WO2021106873A1 - 車両制御装置、車両制御方法、及び車両制御システム - Google Patents
車両制御装置、車両制御方法、及び車両制御システム Download PDFInfo
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- WO2021106873A1 WO2021106873A1 PCT/JP2020/043672 JP2020043672W WO2021106873A1 WO 2021106873 A1 WO2021106873 A1 WO 2021106873A1 JP 2020043672 W JP2020043672 W JP 2020043672W WO 2021106873 A1 WO2021106873 A1 WO 2021106873A1
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- vehicle
- control
- control command
- control device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
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- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
- B60G17/0165—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
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- B60G17/0195—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the regulation being combined with other vehicle control systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Definitions
- the present invention relates to a vehicle control device, a vehicle control method, and a vehicle control system.
- the travel control device of Patent Document 1 sets the target course on the road surface on which the own vehicle travels as the first course based on the map information, and sets the target course on the road surface on which the own vehicle travels based on the rut information.
- the second and third courses are set, the first course is compared with the second and third courses, and the target course on the road surface on which the own vehicle travels is set based on the driving road information and the rut information.
- the present invention has been made in view of the conventional circumstances, and an object of the present invention is a vehicle control device and a vehicle control capable of improving the running stability of a vehicle on a road surface in which a disturbance such as a rut exists.
- the method and the vehicle control system are to be provided.
- the specifications relating to the road condition in front of the vehicle are acquired based on the external world information acquired from the external world recognition unit, and the specifications are obtained based on the specifications relating to the road condition.
- the vehicle behavior control amount for controlling the behavior of the vehicle is acquired based on the estimated state amount of the vehicle and the control amount related to the speed of the vehicle based on the outside world information, and based on the specifications related to the road condition.
- a track tracking control amount for making the vehicle follow the target track is acquired, and the vehicle behavior control amount and the track tracking are obtained.
- a first control command for controlling the suspension device, a second control command for controlling the steering device, and a third control command for controlling the control drive device are output.
- FIG. 1 is a schematic block diagram showing one aspect of the vehicle control system 100.
- the vehicle 200 of FIG. 1 is a vehicle that can be automatically driven, and has a steering device 210, a suspension device 220, a drive device 230, and a braking device 240.
- the steering device 210 is a device capable of electronically controlling the steering angle by a steering actuator such as an electric power steering (in other words, mechanical steering) or a steer-by-wire system.
- the suspension device 220 is a device capable of electronically controlling the vehicle height and damping force by an energy source such as oil pressure or air pressure such as a fully active suspension or an electronically controlled air suspension.
- the drive device 230 is a device capable of electronically controlling the driving force of a motor, an engine, or the like.
- the braking device 240 is a device capable of electronically controlling the braking force such as a friction brake and a regenerative brake.
- the drive device 230 and the braking device 240 constitute a control drive device capable of electronically controlling the control drive force of the vehicle 200.
- the vehicle control system 100 includes an outside world recognition unit 300, a vehicle behavior detection unit 400, and an integrated control controller 500 (vehicle control device).
- the outside world recognition unit 300 acquires the position of the own vehicle and the outside world information from the outside by a stereo camera 310 that captures the surroundings of the vehicle 200, a navigation system 320 that uses GPS (Global Positioning System) and map information together, and inter-vehicle communication. It also has an electronic control unit 330 (AD-ECU, ADAS-ECU) that controls an automatic operation or an advanced driver assistance system.
- AD-ECU electronice control unit 330
- the outside world recognition unit 300 can include LIDAR (Light Detection and Ranging, Laser Imaging Detection and Ranging) and the like. Further, the electronic control unit 340 has a function of acquiring external world information (peripheral information) through analysis of an image taken by the stereo camera 310 or the like.
- the integrated control controller 500 is an electronic control device including a microcomputer 500A as a control unit that requests a control command for controlling the steering device 210, the suspension device 220, the driving device 230, and the braking device 240.
- the integrated control controller 500 acquires information such as vehicle speed command / acceleration command, road surface displacement, road shape, and surrounding environment from the outside world recognition unit 300, and vehicle behavior (for example, yaw rate, lateral G, etc.) from the vehicle behavior detection unit 400.
- Information on front / rear G, wheel speed, etc.) is acquired, and the acquired information is calculated and processed to obtain and output control commands for controlling each of the steering device 210, suspension device 220, drive device 230, and braking device 240. ..
- the integrated control controller 500 detects the road condition in front of the vehicle, such as the curvature of the road, ruts, snowdrifts, bumps, and potholes, which may disturb the behavior of the vehicle 200, as preview information from the stereo camera 310.
- the integrated control controller 500 detects that a disturbance such as a rut exists on the road surface in front of the vehicle
- the steering device 210, the suspension device 220, the drive device 230, and the braking device 240 use the steering device 210, the suspension device 220, the driving device 240, and the front / rear, left / right, left and right of the vehicle 200.
- integrated control for ensuring the running stability of the vehicle 200 on a road surface where disturbances such as ruts exist is performed.
- the integrated control controller 500 controls the front and rear axes by controlling the driving force by the driving device 230 and the braking device 240, that is, by controlling the engine torque, the motor torque / regenerative brake, and the friction brake, and the left and right axes are controlled.
- the control is performed by controlling the steering angle by the steering device 210, and the control of the vertical axis is performed by controlling the vehicle height and damping force by the suspension device 220.
- ruts, snowdrifts, bumps, and potholes are the specifications related to changes in road surface displacement among the specifications related to road conditions, that is, the recognition results regarding the unevenness of the road surface in the road conditions (in other words, the unevenness of the road surface). Identification information).
- the integrated control controller 500 acquires specifications related to the road condition (specifically, information on changes in the curvature of the road surface and the displacement of the road surface) based on the analysis result of the image taken by the stereo camera 310.
- the integrated control controller 500 performs 3-axis control for ensuring the running stability of the vehicle 200 for each road condition (in other words, the disturbance). For each type of).
- FIG. 2 is a diagram showing the control contents of the integrated control controller 500 when the vehicle 200 travels on a rutted road surface.
- a rut is a trace of a wheel (in other words, a groove or a recess) that remains on the road surface after a car has passed, and occurs on a snowy road or an unpaved road. The case of ruts on the road will be described.
- the integrated control controller 500 detects a rut in front of the vehicle 200 based on the preview information from the stereo camera 310, the vehicle 200 travels along the rut at the traveling speed of the vehicle 200 before the vehicle 200 enters the rut. Decelerate to a predetermined appropriate vehicle speed that can ensure stability when the vehicle is used. As a result, the integrated control controller 500 causes the vehicle 200 to enter the rut at a speed equal to or lower than the appropriate vehicle speed.
- the integrated control controller 500 adjusts the vehicle 200 to an appropriate vehicle speed by performing control for reducing the driving force generated by the driving device 230 and / or controlling for increasing the braking force generated by the braking device 240. Decelerate to. That is, when the integrated control controller 500 detects a rut in front of the vehicle, the drive device 230 and the drive device 230 and the vehicle speed are lowered as compared with before detecting the rut, in other words, as compared with when traveling on a road surface without ruts. / Or outputs a deceleration control command (third control command) to the braking device 240.
- the integrated control controller 500 raises the vehicle height when the vehicle 200 travels on a rut, as compared with when the vehicle 200 travels on a road surface without ruts.
- a control command (first control command) for raising the vehicle height is output to the suspension device 220.
- the integrated control controller 500 controls the toe-in when the vehicle 200 travels in a rut. carry out.
- the integrated control controller 500 performs toe-in control when the vehicle 200 travels on the rut so that the toe angle of the front wheels is directed more inward than when the vehicle 200 does not travel on the rut, so that the vehicle 200 travels along the rut. Improves stability when doing. As described above, when the vehicle 200 travels in a rut, the integrated control controller 500 performs deceleration to an appropriate vehicle speed for rut travel, an increase in vehicle height, and three-axis control of toe-in, thereby causing the vehicle 200 to perform three-axis control. Ensure stability when driving on ruts.
- the integrated control controller 500 makes the vehicle 200 move along the center of the rut when the vehicle 200 travels in the rut, in other words, the left and right wheels are fitted in the rut.
- a control command (second control command) for the target trajectory is output to the steering device 210 so as to travel along the line.
- the center of the ruts is the center of the distance between the left and right ruts (see FIG. 2).
- the integrated control controller 500 since the integrated control controller 500 has deep ruts, it is not possible to sufficiently suppress the interference between the vehicle 200 and the snow cover even if the control for raising the vehicle height to the maximum is performed. If it is determined that the vehicle cannot be secured, a correction process is performed to offset the target track in automatic driving by a predetermined distance in the left-right direction from the center of the rut, and the steering device 210 is used to drive the vehicle 200 along the corrected target track.
- a control command for the steering angle (second control command) is output to. That is, the integrated control controller 500 acquires the target trajectory based on the specifications related to the disturbance (identification information of the rudder) and the specifications related to the road shape (in other words, the information related to the road shape) in the road surface condition. , A control command (second control command) related to steering is output to the steering device 210 so that the vehicle 200 travels along the target track.
- FIG. 3 shows the control contents of the integrated control controller 500 when the vehicle 200 travels in the snowdrift.
- a snowdrift is a place where snow or fallen leaves are blown by the wind and is deposited on the road or a deposit (convex portion) on the road.
- snow is blown as an example. The case of the snowdrift will be described.
- the traveling speed of the vehicle 200 is set when the vehicle 200 travels in the snowdrift before the vehicle 200 enters the snowdrift. Decelerate to a predetermined appropriate vehicle speed that can ensure stability. As a result, the integrated control controller 500 causes the vehicle 200 to enter the snowdrift at a speed equal to or lower than the appropriate vehicle speed.
- the integrated control controller 500 adjusts the vehicle 200 to an appropriate vehicle speed by performing control for reducing the driving force generated by the driving device 230 and / or controlling for increasing the braking force generated by the braking device 240. Decelerate to. That is, when the integrated control controller 500 detects a snowdrift in front of the vehicle, the vehicle speed is lower than before the snowdrift is detected, in other words, when the vehicle travels on a road surface without a snowdrift. / Or outputs a deceleration control command (third control command) to the braking device 240.
- the integrated control controller 500 raises the vehicle height when the vehicle 200 travels in the snowdrift as compared with when traveling on a road surface without the snowdrift.
- a control command (first control command) for raising the vehicle height is output to the suspension device 220.
- the integrated control controller 500 gives a steering angle control command to the steering device 210 so that when the vehicle 200 travels in the snowdrift, the yaw moment is generated in the direction opposite to the yaw moment generated by the runway resistance due to the snowdrift.
- the second control command) is output to cancel the yaw moment generated by the track resistance of the snowdrift.
- FIG. 4 shows control of a target trajectory for running the vehicle 200 while avoiding snowdrifts.
- the integrated control controller 500 detects a snowdrift in front of the vehicle 200, if an avoidance condition such as no oncoming vehicle is satisfied, the integrated control controller 500 corrects the target trajectory so as to avoid the snowdrift, and follows the corrected target track.
- the vehicle 200 can be driven. That is, the integrated control controller 500 acquires the target trajectory based on the specifications related to the disturbance in the road surface condition (identification information of the snowdrift) and the specifications related to the road shape (in other words, the information related to the road shape).
- a control command (second control command) related to steering is output to the steering device 210 so that the vehicle 200 travels along the target track.
- FIG. 5 shows the control contents of the integrated control controller 500 when a pothole is detected in front of the vehicle 200.
- the pothole is a hole (or recess) having a length of about 0.1 m to 1 m formed on a paved road surface (for example, asphalt pavement).
- the integrated control controller 500 detects a pothole in front of the vehicle 200 based on the preview information from the stereo camera 310, the vehicle 200 determines the traveling speed of the vehicle 200 and the vehicle 200 determines the pothole before the vehicle 200 enters the pothole. Decelerate to a predetermined appropriate vehicle speed that can ensure stability when driving. As a result, the integrated control controller 500 causes the vehicle 200 to enter the pothole at a speed equal to or lower than the appropriate vehicle speed.
- the integrated control controller 500 adjusts the vehicle 200 to an appropriate vehicle speed by performing control for reducing the driving force generated by the driving device 230 and / or controlling for increasing the braking force generated by the braking device 240. Decelerate to. That is, when the integrated control controller 500 detects a pothole in front of the vehicle, the integrated control controller 500 is driven so that the vehicle speed is lower than before detecting the pothole, in other words, when traveling on a road surface without a pothole.
- a deceleration control command (third control command) is output to the device 230 and / or the braking device 240.
- the integrated control controller 500 outputs a control command for the vehicle height and / or damping force to the suspension device 220 in order to prevent the wheels of the vehicle 200 from falling into the pothole and applying an impact to the vehicle body.
- the integrated control controller 500 tightens the lifting control command (first control command) and / or the damper (in other words, the shock absorber) for the wheels predicted to travel on the pothole, in other words.
- a control command (first control command) for increasing the damping force which is the resistance force generated by the damper, is output to the suspension device 220.
- the integrated control controller 500 can drive the vehicle 200 on a track that avoids the pothole, the integrated control controller 500 corrects the vehicle 200 to a target track that avoids the pothole so that the vehicle 200 runs along the target track. It is possible to output a steering angle control command (second control command) to the steering device 210. That is, the integrated control controller 500 is based on the specifications related to the disturbance in the road surface condition (specifically, the identification information of the pothole) and the specifications related to the road shape (in other words, the information related to the road shape).
- the target track is acquired, and a control command (second control command) related to steering is output to the steering device 210 so that the vehicle 200 travels along the target track.
- FIG. 6 shows the control contents of the integrated control controller 500 when a bump is detected in front of the vehicle 200.
- a bump is a raised object (for example, a speed bump or a speed cushion) that is intentionally installed to encourage the driver to decelerate by indicating a place where a part of the road is raised due to a construction mark or the like. Can be excluded.
- the traveling speed of the vehicle 200 is set when the vehicle 200 travels on the bump before the vehicle 200 enters the bump. Decelerate to a predetermined appropriate vehicle speed that can ensure stability. As a result, the integrated control controller 500 causes the vehicle 200 to enter the bump at a speed equal to or lower than the appropriate vehicle speed.
- the integrated control controller 500 adjusts the vehicle 200 to an appropriate vehicle speed by performing control for reducing the driving force generated by the driving device 230 and / or controlling for increasing the braking force generated by the braking device 240. Decelerate to. That is, when the integrated control controller 500 detects a bump in front of the vehicle, the drive device 230 and the drive device 230 and the vehicle speed are lowered so that the vehicle speed is lower than before the bump is detected, in other words, when the vehicle travels on a road surface without bumps. / Or outputs a deceleration control command (third control command) to the braking device 240.
- the integrated control controller 500 outputs a control command for the vehicle height and / or damping force to the suspension device 220 in order to suppress the vertical vibration of the vehicle 200 when the wheels of the vehicle 200 ride on the bumps.
- the integrated control controller 500 softens the lifting control command (first control command) or the damper (in other words, the shock absorber) for the wheel predicted to ride on the bump, in other words, the damper A control command (first control command) for lowering the damping force, which is the generated resistance force, is output to the suspension device 220.
- the integrated control controller 500 corrects the vehicle 200 to a target track that avoids bumps, and steers the vehicle 200 so that the vehicle 200 travels along the target track. It is possible to output a steering angle control command (second control command) to the device 210. That is, the integrated control controller 500 acquires the target trajectory based on the specifications related to the disturbance in the road surface condition (bump identification information) and the specifications related to the road shape (in other words, information related to the road shape). , A control command (second control command) related to steering is output to the steering device 210 so that the vehicle 200 travels along the target track.
- FIG. 7 shows the control contents of the integrated control controller 500 when a curved road (in other words, the curvature of the road surface) is detected in front of the vehicle 200.
- the integrated control controller 500 detects a curved road in front of the vehicle 200 based on preview information and map information from the stereo camera 310, the traveling speed of the vehicle 200 is set to the vehicle 200 before the vehicle 200 enters the curved road. Decelerates to a predetermined appropriate vehicle speed that can ensure stability when driving on a curved road. As a result, the integrated control controller 500 causes the vehicle 200 to enter the curved road at a speed equal to or lower than the appropriate vehicle speed.
- the integrated control controller 500 adjusts the vehicle 200 to an appropriate vehicle speed by performing control for reducing the driving force generated by the driving device 230 and / or controlling for increasing the braking force generated by the braking device 240. Decelerate to. That is, when the integrated control controller 500 detects a curved road in front of the vehicle, the vehicle speed is lower than before detecting the curved road, in other words, the vehicle speed is lower than when traveling on a straight road. / Or outputs a deceleration control command (third control command) to the braking device 240.
- the integrated control controller 500 gives a vehicle height adjustment control command (first control command) to the suspension device 220 so that the vehicle height on the inside of the turn is lower than the height of the vehicle on the outside of the turn among the left and right vehicle heights of the vehicle 200.
- first control command a vehicle height adjustment control command
- the integrated control controller 500 reduces the vehicle height inside the turn and raises the vehicle height outside the turn from the state where the left and right vehicle heights are controlled to be the same, thereby performing vehicle height control inside the turn.
- the vehicle height of is lower than the vehicle height on the outside of the turn.
- the integrated control controller 500 includes a state estimation unit 510 and an integrated control execution unit 520, and further, the integrated control execution unit 520 includes a vehicle behavior control unit 530, a track tracking control unit 540, and a distribution control unit 550.
- the state estimation unit 510 includes a road surface determination unit 511, a vehicle state quantity estimation unit 512, and a track generation unit 513.
- the road surface determination unit 511 acquires road surface displacement, road shape, peripheral information, etc. from the outside world recognition unit 300, and specifies information such as ruts, snowdrifts, potholes, bumps, etc., that is, specifications related to the road condition including disturbance information. Is calculated and output.
- the vehicle state quantity estimation unit 512 acquires road condition information and the like output by the road surface determination unit 511, and estimates the vehicle condition quantity including the estimated vehicle speed, side slip angle, vehicle height, self-position, and the like.
- the estimated vehicle speed is the vehicle speed data obtained based on the wheel speed information.
- the track generation unit 513 acquires road shape and surrounding information from the outside world recognition unit 300, and also acquires road condition information including disturbance information (for example, identification information such as ruts) from the road surface determination unit 511.
- the track generation unit 513 generates a target track that avoids the disturbance according to conditions such as a state of disturbance such as a snowdrift and the presence or absence of an oncoming vehicle. Further, the track generation unit 513 generates a target track so that the position of the center of gravity of the vehicle 200 moves along the center of the rut when the vehicle 200 travels on the rut, and further, travels along the rut. If it is determined that the vehicle height is not sufficient to enable it, a target track offset from the center of the rut by a predetermined distance in the left-right direction is generated.
- the road surface determination unit 511 determines the road surface condition in front of the vehicle 200 based on the specifications related to the road surface displacement and the specifications related to the road shape, and the track generation unit 513 determines various disturbances related to the road surface condition. Obtain the target trajectory based on the original and the specifications related to the road shape.
- the vehicle behavior control unit 530 of the integrated control execution unit 520 includes a vehicle speed control unit 531 and an attitude control unit 532.
- the vehicle speed control unit 531 acquires information on vehicle speed commands and acceleration commands in automatic driving (advanced driving support) from the outside world recognition unit 300, in other words, information on the control amount related to the speed of the vehicle 200, and estimates the vehicle state amount.
- Information on the estimated vehicle speed is acquired from the unit 512, and further, information on the target vehicle speed according to the disturbance of the road surface is acquired from the attitude control unit 532.
- the vehicle speed control unit 531 determines whether or not there is a deceleration request before entering a disturbance such as a rut from the information of the target vehicle speed according to the disturbance of the road surface and the information of the vehicle speed command in the automatic driving, and determines the final target. Determine the vehicle speed. Further, the vehicle speed control unit 531 obtains the target front-rear acceleration based on the comparison between the final target vehicle speed and the estimated vehicle speed, and outputs the information of the obtained target front-rear acceleration.
- a disturbance such as a rut
- the attitude control unit 532 acquires the information of the target track from the track generation unit 513, and acquires the vehicle state amount information including the approach state of the road surface to the disturbance from the vehicle state amount estimation unit 512, and obtains the information of the vehicle state amount in these. Based on this, the target vehicle height, target roll moment, target lateral acceleration, etc. are calculated and output. That is, when the vehicle 200 travels on a disturbed portion of the road surface such as a rut or a snowdrift, the attitude control unit 532 changes the target vehicle height so as to raise the vehicle height, and the yaw generated by the runway resistance due to the snowdrift.
- the target lateral acceleration is set so as to generate a yaw moment in the direction opposite to the moment.
- the attitude control unit 532 outputs a toe-in request when the vehicle 200 travels on a rut, and outputs a damping force and / or a vehicle height adjustment request when the vehicle 200 travels on a bump or a pothole. Further, when the vehicle 200 travels on a curved road, it outputs a request for left and right vehicle height adjustment.
- the vehicle behavior control unit 530 including the vehicle speed control unit 531 and the attitude control unit 532 controls the vehicle state quantity including the estimated vehicle speed of the vehicle 200, the target track, and the speed of the vehicle 200 (specifically, in detail, The vehicle behavior control amount is acquired based on the vehicle speed command and acceleration command).
- the track tracking control unit 540 acquires information on its own position (own vehicle position) from the vehicle state quantity estimation unit 512 and information on the target track from the track generation unit 513, and traces the vehicle 200 to the target track. Information on the target lateral acceleration (trajectory tracking control amount) of is obtained and output. That is, the track tracking control unit 540 acquires the track tracking control amount based on the self-position of the vehicle 200 and the target track among the estimated state quantities of the vehicle 200.
- the distribution control unit 550 includes a front / rear / pitch control unit 551, an up / down / roll control unit 552, and a left / right / yaw control unit 553, and constitutes a drive device 230, a braking device 240, a suspension device 220, and steering.
- a control command is output to each of the devices 210.
- the front-rear / pitch control unit 551 acquires information on the target front-rear acceleration from the vehicle speed control unit 531, and based on the comparison between the target front-rear acceleration and the actual front-rear acceleration, the control command (third control) for realizing the target front-rear acceleration.
- a drive torque control command is output to the drive device 230, and a braking torque control command is output to the braking device 240.
- the vertical / roll control unit 552 acquires information such as a target vehicle height, a target roll moment, and a target damping force from the attitude control unit 532, and based on these, a control command (first control) for adjusting the vehicle height and damping force. Command) is output to the suspension device 220.
- the left / right / yaw control unit 553 acquires information on the target lateral acceleration from the attitude control unit 532 and the trajectory tracking control unit 540, and issues a control command (second control command) for adjusting the rudder angle based on the information of the steering device 210. Output to.
- the distribution control unit 550 controls the suspension device 220 based on the vehicle behavior control amount from the vehicle behavior control unit 530 and the track follow control amount from the track follow control unit 540. It outputs a command, a second control command for controlling the steering device 210, and a third control command for controlling the control drive device (drive device 230 and braking device 240).
- FIG. 9 is a flowchart showing the procedure of control processing of each of the steering device 210, the suspension device 220, the driving device 230, and the braking device 240 by the integrated control controller 500.
- the integrated control controller 500 determines whether or not the steering device 210, the driving device 230, the braking device 240, and the external world recognition unit 300 are normal, and if any of them is abnormal, the automatic operation and the advanced operation are performed. Since support cannot be provided, the arithmetic processing is terminated without performing various controls.
- step S1100 determines whether or not a rut has been detected in front of the vehicle 200. To do.
- step S1200 determines whether or not a snowdrift is detected in front of the vehicle 200.
- the integrated control controller 500 causes the vehicle 200 to travel along the target track in step S1300. Perform orbit tracking control. Further, the integrated control controller 500 proceeds to step S1400 to perform control (control 1) when the vehicle 200 travels on the rutted road surface.
- step S1401 the integrated control controller 500 implements control drive control for decelerating the vehicle 200 to a predetermined appropriate vehicle speed suitable for rut running before the vehicle 200 enters the rut. That is, in step S1401, the integrated control controller 500 outputs a control command (third control command) for decelerating the vehicle 200 to an appropriate vehicle speed for rut running to the drive device 230 and / or the braking device 240 (FIG. FIG. 2).
- step S1402 determines in step S1402 whether or not the suspension device 220 is normal. Then, if the suspension device 220 is normal, the integrated control controller 500 proceeds to step S1403 and adjusts the vehicle height so that the lower surface of the vehicle 200 does not rub against the snow when traveling with the wheels fitted in the ruts. Control to implement.
- the integrated control controller 500 when the suspension device 220 is normal, the integrated control controller 500 outputs a control command (first control command) for raising the vehicle height of the vehicle 200 to the suspension device 220 in step S1403 (see FIG. 2). ..
- the integrated control controller 500 cancels the vehicle height adjustment by bypassing step S1403 and proceeding to step S1404.
- step S1404 the integrated control controller 500 determines whether or not the vehicle height is secured so that the lower surface of the vehicle 200 is not rubbed by snow. Then, if the vehicle height required for rut running is secured, the integrated control controller 500 bypasses step S1405 and step S1406 and proceeds to step S1407, so that the wheels of the vehicle 200 are fitted into the ruts. Try to run.
- step S1405. Set to offset the target trajectory from the center of the rut. That is, if the vehicle travels in a state where the wheels of the vehicle 200 are fitted in the ruts, the lower surface of the vehicle 200 may be rubbed by snow due to insufficient vehicle height. Therefore, the integrated control controller 500 does not fit the wheels of the vehicle 200 in the ruts. Correct the target trajectory so that it runs on the wheel.
- the integrated control controller 500 outputs a steering angle command (second control command) such that the vehicle 200 traces the corrected target trajectory to the steering device 210. If the target trajectory is corrected in step S1405, the vehicle 200 will travel on a road surface having a large track resistance that the preceding vehicle does not pass through. Therefore, the integrated control controller 500 increases the drive torque in the next step S1406. ..
- the integrated control controller 500 can secure the vehicle height required for rut running, and when the vehicle 200 is run along the rut, the process proceeds to step S1407, and the steering device 210 can adjust the toe angle independently on the left and right. If it is determined whether or not the system is a by-wire system and the toe angle can be adjusted independently on the left and right, the process proceeds to step S1408.
- the integrated control controller 500 is a toe-in control command (first) in which the toe angle of the front wheels is directed more inward than when the wheels are not running in order to improve the stability when the wheels are fitted in the ruts. 2 Control command) is output to the steering device 210 (see FIG. 2).
- step S1200 of the flowchart of FIG. 9 that is, when it detects a rut and a snowdrift in front of the vehicle 200
- the integrated control controller 500 proceeds to step S1500 and moves the vehicle 200 along the target track. Carry out track-following control to drive. Further, the integrated control controller 500 performs control (control 2) for traveling on a snowy road in which ruts and snowdrifts are present in the next step S1600.
- step S1601-step S1608 is the same as that of step S1401-step S1408 described above, and thus detailed description thereof will be omitted.
- the integrated control controller 500 performs deceleration control, vehicle height control, target trajectory correction control, and toe angle control in step S1601-step S1608, and then proceeds to step S1609. Then, the integrated control controller 500 generates a yaw moment in the direction opposite to the yaw moment generated by the runway resistance due to the snowdrift when the vehicle 200 travels in the snowdrift in step S1609 and in step S1609.
- a control command for the steering angle (second control command) is output to offset the yaw moment generated by the runway resistance due to snowdrift (see FIG. 3).
- step S1700 determines whether or not a snowdrift has been detected. Then, when the integrated control controller 500 detects a snowdrift in front of the vehicle, the integrated control controller 500 proceeds to step S1800 to perform track tracking control for traveling the vehicle 200 along the target track, and further, in the next step S1900, the vehicle 200 Controls (control 3) when the vehicle travels in the snowdrift.
- the flowchart of FIG. 12 shows the details of the processing content (control 3) of step S1900.
- step S1901 the integrated control controller 500 implements control drive control for decelerating to a predetermined appropriate vehicle speed suitable for snowdrift running before the vehicle 200 enters the snowdrift. That is, in step S1901, the integrated control controller 500 outputs a control command (third control command) for decelerating the vehicle 200 to an appropriate vehicle speed for snowdrift running to the drive device 230 and / or the braking device 240.
- a control command third control command
- step S1902 the integrated control controller 500 proceeds to step S1902 to determine whether or not it is possible to drive the vehicle 200 while avoiding (bypassing) the snowdrift, such as the presence or absence of an oncoming vehicle, the size and position of the snowdrift, and the like. Judgment is based on driving conditions. Then, when it is possible to avoid the snowdrift, the integrated control controller 500 proceeds to step S1903, and corrects the target trajectory (in other words, the target traveling trajectory) of the vehicle 200 to a track that avoids the snowdrift (FIG. 4), a steering angle command (second control command) for the vehicle 200 to trace the corrected target trajectory is output to the steering device 210.
- the target trajectory in other words, the target traveling trajectory
- a steering angle command second control command
- the integrated control controller 500 proceeds to step S1904 and determines whether or not the suspension device 220 is normal. Then, when the suspension device 220 is normal, the integrated control controller 500 proceeds to step S1905 and performs vehicle height control to raise the vehicle height of the vehicle 200 more than before entering the snowdrift to improve the running stability (). (See FIG. 3).
- the integrated control controller 500 outputs a vehicle height control command (first control command) for raising the vehicle height of the vehicle 200 to the suspension device 220 when the vehicle 200 travels in the snowdrift.
- first control command a vehicle height control command for raising the vehicle height of the vehicle 200 to the suspension device 220 when the vehicle 200 travels in the snowdrift.
- the integrated control controller 500 bypasses step S1905 and proceeds to step S1906 to cancel the vehicle height adjustment.
- step S1906 the integrated control controller 500 controls the steering angle of the steering device 210 so that when the vehicle 200 travels in the snowdrift, the yaw moment is generated in the direction opposite to the yaw moment generated by the runway resistance due to the snowdrift.
- a command (second control command) is output to cancel the yaw moment generated by the runway resistance due to the snowdrift (see FIG. 3).
- step S1700 of the flowchart of FIG. 9 the integrated control controller 500 proceeds to step S2000 and determines whether or not a pothole has been detected. Then, when the integrated control controller 500 detects the pothole, the integrated control controller 500 proceeds to step S2100 to perform track tracking control for traveling the vehicle 200 along the target track.
- control controller 500 executes control (control 4) when the vehicle 200 travels in the pothole in the next step S2200.
- control control 4
- the flowchart of FIG. 13 shows the details of the processing content (control 4) of step S2200.
- step S2201 the integrated control controller 500 implements control drive control for decelerating the vehicle 200 to a predetermined appropriate vehicle speed suitable for pothole driving before the vehicle 200 enters the pothole. That is, in step S2201, the integrated control controller 500 outputs a control command (third control command) for decelerating the vehicle 200 to an appropriate vehicle speed for pothole traveling to the drive device 230 and / or the braking device 240.
- a control command third control command
- step S2202 determines whether or not it is possible to drive the vehicle 200 while avoiding (bypassing) the pothole, as to whether or not there is an oncoming vehicle, the size and position of the pothole. Judgment is made based on driving conditions such as. Then, when it is possible to avoid the pothole, the integrated control controller 500 proceeds to step S2203, corrects the target track of the vehicle 200 to a track that avoids the pothole (see FIG. 5), and after the correction. A steering angle command (second control command) for the vehicle 200 to trace the target trajectory is output to the steering device 210.
- step S2203 corrects the target track of the vehicle 200 to a track that avoids the pothole (see FIG. 5), and after the correction.
- a steering angle command (second control command) for the vehicle 200 to trace the target trajectory is output to the steering device 210.
- the integrated control controller 500 proceeds to step S2204 and determines whether or not the suspension device 220 is normal. Then, when the suspension device 220 is normal, the integrated control controller 500 proceeds to step S2205 and performs vehicle height control for lifting the wheels entering the pothole (see FIG. 5).
- the integrated control controller 500 implements damping force control for hardening the dampers of the wheels entering the pothole, in other words, increasing the damping force (see FIG. 5).
- the integrated control controller 500 may perform either the vehicle height control in step S2205 or the damping force control in step S2206 when the suspension device 220 is a fully active suspension whose vehicle height can be adjusted. it can.
- the integrated control controller 500 can cancel the process of step S2205 and carry out step S2206. In this way, the integrated control controller 500 outputs a control command (first control command) for preventing the wheels from falling into the pothole when the vehicle 200 travels in the pothole, thereby outputting the control command (first control command) to the suspension device 220. , Improves stability when the vehicle 200 travels in a pothole.
- step S2300 determines whether or not a bump has been detected. Then, when the integrated control controller 500 detects a bump, the integrated control controller 500 proceeds to step S2400 to perform track tracking control for traveling the vehicle 200 along the target track.
- control controller 500 executes control (control 5) when the vehicle 200 travels on the bump in the next step S2500.
- control control 5
- the flowchart of FIG. 14 shows the details of the processing content (control 5) of step S2500.
- step S2501 the integrated control controller 500 performs control drive control for decelerating the vehicle 200 to a predetermined appropriate vehicle speed suitable for bump running before the vehicle 200 enters the bump. That is, in step S2501, the integrated control controller 500 outputs a control command (third control command) for decelerating the vehicle 200 to an appropriate vehicle speed for bump traveling to the drive device 230 and / or the braking device 240.
- a control command third control command
- step S2502 the integrated control controller 500 proceeds to step S2502 to determine whether or not the vehicle 200 can be driven by avoiding (bypassing) the bumps, such as the presence or absence of an oncoming vehicle, the size and position of the bumps, and the like. Judgment is based on driving conditions. Then, when it is possible to avoid the bumps, the integrated control controller 500 proceeds to step S2503, corrects the target trajectory of the vehicle 200 to a track that avoids the bumps (see FIG. 6), and corrects the target trajectory. Is output to the steering device 210 so that the vehicle 200 traces the steering angle command (second control command).
- the integrated control controller 500 proceeds to step S2504 and determines whether or not the suspension device 220 is normal. Then, when the suspension device 220 is normal, the integrated control controller 500 proceeds to step S2505 and performs vehicle height control for lifting the wheels entering the bump (see FIG. 6).
- the integrated control controller 500 performs damping force control for softening the damper of the wheel entering the bump, in other words, lowering the damping force (see FIG. 6).
- the integrated control controller 500 may perform either the vehicle height control in step S2505 or the damping force control in step S2506 when the suspension device 220 is a fully active suspension whose vehicle height can be adjusted. it can.
- the integrated control controller 500 can cancel the process of step S2505 and carry out step S2506. In this way, the integrated control controller 500 outputs a control command (first control command) for suppressing the impact from being transmitted to the vehicle body when the vehicle 200 travels on the bump, thereby outputting the vehicle to the suspension device 220. Improves stability when the 200 runs on the bump.
- step S2600 determines whether or not a curved road has been detected. Then, when the integrated control controller 500 detects a curved road, the integrated control controller 500 proceeds to step S2700 to perform track-following control for driving the vehicle 200 along the target track.
- control controller 500 executes control (control 6) when the vehicle 200 travels on a curved road in the next step S2800.
- control 6) when the vehicle 200 travels on a curved road in the next step S2800.
- the flowchart of FIG. 15 shows the details of the processing content (control 6) of step S2800.
- step S2801 the integrated control controller 500 performs control drive control for decelerating to a predetermined appropriate vehicle speed suitable for curve traveling (turning traveling) before the vehicle 200 enters the curved road (see FIG. 7). That is, in step S2801, the integrated control controller 500 outputs a control command (third control command) for decelerating the vehicle 200 to an appropriate vehicle speed for traveling on a curved road to the drive device 230 and / or the braking device 240.
- a control command third control command
- step S2802 the integrated control controller 500 proceeds to step S2802 to determine whether or not the suspension device 220 is normal. Then, when the suspension device 220 is normal, the integrated control controller 500 proceeds to step S2803 to suppress the lateral acceleration (lateral acceleration) felt by the driver (occupant) when the vehicle 200 travels on a curved road. Carry out vehicle height control.
- step S2803 the integrated control controller 500 outputs a vehicle height adjustment control command (first control command) to the suspension device 220 so that the vehicle height inside the turn is lower than the vehicle height outside the turn on the curved road.
- first control command a vehicle height adjustment control command
- the integrated control controller 500 can predict the lateral acceleration generated during the curve traveling and adjust the difference in vehicle height between the inner and outer wheels of the turn based on the prediction result.
- step S2600 of the flowchart of FIG. 9 that is, all of ruts, snowdrifts, potholes, bumps, and curved roads. If a flat and substantially straight road extends in front of the vehicle 200 without detecting the above, the process proceeds to step S2900, and track tracking control for driving the vehicle 200 along the target track is performed.
- the integrated control controller 500 has the snowdrift or bump. Even if it is possible to avoid disturbances such as potholes, the vehicle 200 can be driven without changing the target trajectory. Further, even when the vehicle height of the vehicle 200 can be adjusted to a sufficient height on the rut road surface, the target trajectory of the vehicle 200 is offset to the left and right by a predetermined distance from the center of the rut (the center of the distance between the left and right ruts). Can be made to.
- the vehicle 200 covers a portion where the height of the snowdrift or bump is lower than the predetermined value, or a portion where the depth of the pot hole is shallower than the predetermined value or the size is smaller than the predetermined value.
- the target trajectory of the vehicle 200 can be changed so as to travel.
- the integrated control controller 500 can change the appropriate vehicle speed targeted in the deceleration control before entering the disturbance according to the height of snowdrifts and bumps, or the depth of ruts and potholes.
- the integrated control controller 500 sets the adjustment allowance for the lifting amount and the damping force in the wheel lifting control and the damping force adjustment control when the vehicle 200 travels on the pothole or the bump, by adjusting the depth and size of the pothole. It can be changed according to the height of the bump. Further, the integrated control controller 500 gives a steering angle control command (No. 1) to the steering device 210 so that the yaw moment is generated in the direction opposite to the yaw moment generated when one of the left and right wheels travels on a bump or a pot hole. 2 Control command) can be output.
- the integrated control controller 500 when the integrated control controller 500 detects a bump (for example, a speed bump or a speed cushion) intentionally installed in front of the vehicle 200 to encourage the driver to decelerate, the integrated control controller 500 lifts a wheel that overcomes the bump.
- a control command (first control command) can be output to the suspension device 220 so as to weaken the damping force of the damper of the wheel overcoming the bump.
- the partial unevenness of the road surface on which vehicle control is performed is ruts, snowdrifts, potholes, and bumps, but the disturbance is not limited to these.
- the integrated control controller 500 detects a falling object on a road having a height of a predetermined value or less, a floor plate placed on the road for road construction, etc. as a convex portion as a disturbance, and before entering the disturbance.
- the suspension device 220 is controlled to lift the wheels and / or to weaken the damping force, or is changed to a target trajectory to avoid the convex portion. Steering control can be performed.
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Abstract
Description
図1は、車両制御システム100の一態様を示す概略ブロック図である。
操舵装置210は、電動パワーステアリング(換言すれば、機械式ステアリング)やステアバイワイヤシステムなどの転舵アクチュエータによって転舵角の電子制御が可能な装置である。
駆動装置230は、モータやエンジンなどの駆動力の電子制御が可能な装置である。
なお、駆動装置230及び制動装置240は、車両200の制駆動力を電子制御可能な制駆動装置を構成する。
外界認識部300は、車両200の周囲を撮影するステレオカメラ310、GPS(Global Positioning System)と地図情報とを併用するナビゲーションシステム320、車両間通信などによって外部から自車位置や外界情報などを取得する通信システム330、更に、自動運転若しくは先進運転支援システムを制御する電子制御ユニット340(AD-ECU、ADAS-ECU)などを有する。
また、電子制御ユニット340は、ステレオカメラ310が撮影した画像の解析などを通じて外界情報(周辺情報)を取得する機能を有する。
統合制御コントローラ500は、外界認識部300から車速指令/加速指令、路面変位、道路形状、周辺環境などの情報を取得し、また、車両挙動検出部400から車両挙動(例えば、ヨーレート、横G、前後G、車輪速など)の情報を取得し、取得した情報を演算処理することで操舵装置210、懸架装置220、駆動装置230、制動装置240それぞれを制御するための制御指令を求めて出力する。
そして、統合制御コントローラ500は、車両前方の路面に轍などの外乱が存在することを検知すると、操舵装置210、懸架装置220、駆動装置230、及び制動装置240によって、車両200の前後、左右、上下の3軸を制御することで、軌道追従制御に加えて、轍などの外乱が存在する路面において車両200の走行安定性を確保するための統合制御を実施する。
なお、轍、吹き溜まり、バンプ、ポットホールは、道路状態に関する諸元のうち、路面変位の変化に関する諸元、つまり、道路状態のうちの路面の凹凸に関する認識結果(換言すれば、路面の凹凸に関する識別情報)である。
以下では、車両前方の路面に轍などの外乱が存在する場合に、統合制御コントローラ500が車両200の走行安定性を確保するために実施する3軸制御を、道路状態毎(換言すれば、外乱の種別毎)に概説する。
なお、轍とは、自動車が通った後に路面に残る車輪の跡(換言すれば、溝や凹部)であり、積雪路或いは未舗装路などで生じるが、以下の実施形態では、一例として、積雪路における轍の場合について説明する。
これにより、統合制御コントローラ500は、車両200を、適正車速以下の状態で轍に進入させる。
つまり、統合制御コントローラ500は、車両前方に轍を検知すると、轍を検知する前よりも、換言すれば、轍がない路面を走行するときよりも、車速が低下するように、駆動装置230及び/又は制動装置240に減速の制御指令(第3制御指令)を出力する。
更に、操舵装置210がステアバイワイヤシステムであって前輪の左右輪のトー角(つまり、フロントトー)が調整可能な場合、統合制御コントローラ500は、車両200が轍を走行する際に、トーイン制御を実施する。
以上のように、統合制御コントローラ500は、車両200が轍を走行する際に、轍走行用の適正車速までの減速、車高の増加、トーインの3軸制御を実施することで、車両200が轍を走行する際の安定性を確保する。
なお、轍の中心とは、左右の轍の間隔の中央である(図2参照)。
つまり、統合制御コントローラ500は、路面状態のうちの外乱に関する諸元(轍の識別情報)と、道路形状に関する諸元(換言すれば、道路形状に関する情報)と、に基づいて目標軌道を取得し、車両200を目標軌道に沿って走行させるように、操舵装置210に転舵に関する制御指令(第2制御指令)を出力する。
なお、吹き溜まりとは、雪や落ち葉などが風で吹き寄せられて、道路上に堆積している場所又は道路上の堆積物(凸部)であるが、以下の実施形態では、一例として、雪が吹き寄せられた吹き溜まりの場合について説明する。
これにより、統合制御コントローラ500は、車両200を、適正車速以下の状態で吹き溜まりに進入させる。
つまり、統合制御コントローラ500は、車両前方に吹き溜まりを検知すると、吹き溜まりを検知する前よりも、換言すれば、吹き溜まりがない路面を走行するときよりも、車速が低下するように、駆動装置230及び/又は制動装置240に減速の制御指令(第3制御指令)を出力する。
なお、車両200が吹き溜まりを走行する際に、左右輪の一方が吹き溜まりを走行すると、左右輪の一方の走路抵抗が他方よりも大きくなって、車両200にヨーモーメントが発生する。
以上のように、統合制御コントローラ500は、車両200が吹き溜まりを走行する際に、換言すれば、車両200が吹き溜まりを乗り越える際に、吹き溜まり走行用の適正車速までの減速、車高の増加、ヨーモーメントを抑制するための転舵の3軸制御を実施することで、車両200が吹き溜まりを走行する際の安定性を確保する。
統合制御コントローラ500は、車両200の前方に吹き溜まりを検知したときに、対向車がいないなどの回避条件が成立する場合は、吹き溜まりを避けるように目標軌道を修正し、修正した目標軌道に沿って車両200を走行させることができる。
つまり、統合制御コントローラ500は、路面状態のうちの外乱に関する諸元(吹き溜まりの識別情報)と、道路形状に関する諸元(換言すれば、道路形状に関する情報)と、に基づいて目標軌道を取得し、車両200を目標軌道に沿って走行させるように、操舵装置210に転舵に関する制御指令(第2制御指令)を出力する。
なお、ポットホールとは、舗装路面(例えば、アスファルト舗装)に生じた長さ0.1m~1m程度の穴(あるいは凹部)である。
これにより、統合制御コントローラ500は、車両200を、適正車速以下の状態でポットホールに進入させる。
つまり、統合制御コントローラ500は、車両前方にポットホールを検知すると、ポットホールを検知する前よりも、換言すれば、ポットホールがない路面を走行するときよりも、車速が低下するように、駆動装置230及び/又は制動装置240に減速の制御指令(第3制御指令)を出力する。
ここで、統合制御コントローラ500は、ポットホール上を走行すると予測される車輪について、持ち上げる制御指令(第1制御指令)、及び/又は、ダンパ(換言すれば、ショックアブソーバー)を堅くする、換言すれば、ダンパが発生する抵抗力である減衰力を高くする制御指令(第1制御指令)を、懸架装置220に出力する。
つまり、統合制御コントローラ500は、路面状態のうちの外乱に関する諸元(詳細には、ポットホールの識別情報)と、道路形状に関する諸元(換言すれば、道路形状に関する情報)と、に基づいて目標軌道を取得し、車両200を目標軌道に沿って走行させるように、操舵装置210に転舵に関する制御指令(第2制御指令)を出力する。
なお、バンプとは、道路の一部が工事跡などで隆起している場所などを示し、運転者に減速を促すために意図的に設置された隆起物(例えば、スピードバンプやスピードクッション)を除外することができる。
これにより、統合制御コントローラ500は、車両200を、適正車速以下の状態でバンプに進入させる。
つまり、統合制御コントローラ500は、車両前方にバンプを検知すると、バンプを検知する前よりも、換言すれば、バンプがない路面を走行するときよりも、車速が低下するように、駆動装置230及び/又は制動装置240に減速の制御指令(第3制御指令)を出力する。
ここで、統合制御コントローラ500は、バンプに乗り上げると予測される車輪について、持ち上げる制御指令(第1制御指令)、若しくは、ダンパ(換言すれば、ショックアブソーバー)を柔らかくする、換言すれば、ダンパが発生する抵抗力である減衰力を低くする制御指令(第1制御指令)を、懸架装置220に出力する。
つまり、統合制御コントローラ500は、路面状態のうちの外乱に関する諸元(バンプの識別情報)と、道路形状に関する諸元(換言すれば、道路形状に関する情報)と、に基づいて目標軌道を取得し、車両200を目標軌道に沿って走行させるように、操舵装置210に転舵に関する制御指令(第2制御指令)を出力する。
統合制御コントローラ500は、ステレオカメラ310からのプレビュー情報や地図情報などに基づき車両200の前方にカーブ路を検知すると、車両200がカーブ路に進入する前に、車両200の走行速度を、車両200がカーブ路を走行するときに安定性を確保できる所定の適正車速にまで減速させる。
これにより、統合制御コントローラ500は、車両200を、適正車速以下の状態でカーブ路に進入させる。
つまり、統合制御コントローラ500は、車両前方にカーブ路を検知すると、カーブ路を検知する前よりも、換言すれば、直線路を走行するときよりも、車速が低下するように、駆動装置230及び/又は制動装置240に減速の制御指令(第3制御指令)を出力する。
例えば、統合制御コントローラ500は、左右の車高が同じに制御されている状態から、旋回内側の車高を下げ、また、旋回外側の車高を上げる車高制御を実施することで、旋回内側の車高を旋回外側の車高より低くする。
統合制御コントローラ500は、状態推定部510及び統合制御実行部520を有し、更に、統合制御実行部520は、車両挙動制御部530、軌道追従制御部540及び分配制御部550を備える。
路面判断部511は、外界認識部300から路面変位、道路形状及び周辺情報などを取得し、前述した轍、吹き溜まり、ポットホール、バンプなど識別情報、つまり、外乱情報を含む、道路状態に関する諸元を求めて出力する。
なお、推定車速とは、車輪速の情報に基づき求められた車速のデータである。
軌道生成部513は、外界認識部300から道路形状や周辺情報を取得するとともに、路面判断部511から外乱情報(例えば、轍などの識別情報)を含む道路状態情報を取得する。
また、軌道生成部513は、車両200が轍を走行する際には、車両200の重心位置が轍の中心に沿って移動するように目標軌道を生成し、更に、轍に沿っての走行を可能にするだけの車高を確保できないと判断した場合は、轍の中心から左右方向に所定距離だけオフセットした目標軌道を生成する。
つまり、路面判断部511は、路面変位に関する諸元と道路形状に関する諸元とに基づいて車両200が走行する前方の路面状態を判断し、軌道生成部513は、路面状態のうちの外乱に関する諸元と、道路形状に関する諸元とに基づいて目標軌道を取得する。
車速制御部531は、外界認識部300から自動運転(先進運転支援)における車速指令及び加速度指令の情報、換言すれば、車両200の速度に関する制御量の情報を取得し、また、車両状態量推定部512から推定車速の情報を取得し、更に、姿勢制御部532から路面の外乱に応じた目標車速の情報を取得する。
更に、車速制御部531は、最終的な目標車速と推定車速との比較に基づき目標前後加速度を求め、求めた目標前後加速度の情報を出力する。
つまり、姿勢制御部532は、車両200が轍や吹き溜まりなどの路面の外乱部分を走行する際には、車高を上げるように目標車高を変更し、また、吹き溜まりによる走路抵抗で発生するヨーモーメントと逆方向のヨーモーメントを発生させるように目標横加速度を設定する。
このように、車速制御部531及び姿勢制御部532からなる車両挙動制御部530は、車両200の推定車速を含む車両状態量と、目標軌道と、車両200の速度に関する制御量(詳細には、車速指令、加速度指令)と、に基づいて車両挙動制御量を取得する。
つまり、軌道追従制御部540は、車両200の推定状態量のうちの車両200の自己位置と、目標軌道とに基づいて軌道追従制御量を取得する。
前後/ピッチ制御部551は、車速制御部531から目標前後加速度の情報を取得し、目標前後加速度と実際の前後加速度との比較に基づき、目標前後加速度を実現するための制御指令(第3制御指令)として、駆動トルクの制御指令を駆動装置230に出力し、制動トルクの制御指令を制動装置240に出力する。
左右/ヨー制御部553は、姿勢制御部532及び軌道追従制御部540から目標横加速度の情報を取得し、これらに基づき舵角を調整するための制御指令(第2制御指令)を操舵装置210に出力する。
統合制御コントローラ500は、ステップS1000で、操舵装置210、駆動装置230、制動装置240及び外界認識部300が正常であるか否かを判断し、いずれかに異常があれば、自動運転及び先進運転支援を実施できないので、各種制御を実施することなく演算処理を終了させる。
統合制御コントローラ500は、車両200の前方に轍を検知すると、次いで、ステップS1200に進み、車両200の前方に吹き溜まりを検知したか否かを判断する。
更に、統合制御コントローラ500は、ステップS1400に進み、車両200が轍路面を走行するときの制御(制御1)を実施する。
統合制御コントローラ500は、ステップS1401で、車両200が轍に進入する前に、轍走行に適した所定の適正車速にまで減速させる制駆動制御を実施する。
つまり、統合制御コントローラ500は、ステップS1401で、車両200を轍走行用の適正車速にまで減速させるための制御指令(第3制御指令)を駆動装置230及び/又は制動装置240に出力する(図2参照)。
そして、統合制御コントローラ500は、懸架装置220が正常であれば、ステップS1403に進んで、車輪が轍に嵌った状態で走行するときに車両200の下面が雪で擦らないように車高を調整する制御を実施する。
一方、懸架装置220に異常が発生している場合、統合制御コントローラ500は、ステップS1403を迂回してステップS1404に進むことで、車高調整をキャンセルする。
そして、轍走行に要求される車高が確保されていれば、統合制御コントローラ500は、ステップS1405及びステップS1406を迂回してステップS1407に進むことで、車両200の車輪が轍に嵌った状態で走行させるようにする。
つまり、車両200の車輪が轍に嵌った状態で走行すると、車高不足によって車両200の下面が雪で擦れる可能性があるので、統合制御コントローラ500は、車両200の車輪が轍に嵌らずに走行するように目標軌道を修正する。
ステップS1405で目標軌道を修正すると、車両200は、先行車が通っていない走路抵抗の大きな路面上を走行することになるので、統合制御コントローラ500は、次のステップS1406で、駆動トルクを増加させる。
統合制御コントローラ500は、ステップS1408で、車輪が轍に嵌って走行するときの安定性を向上させるために、轍を走行しない場合よりも前輪のトー角をより内側に向けるトーインの制御指令(第2制御指令)を操舵装置210に出力する(図2参照)。
更に、統合制御コントローラ500は、次のステップS1600で、轍及び吹き溜まりが存在する雪道を走行するための制御(制御2)を実施する。
図11のフローチャートにおいて、ステップS1601-ステップS1608の各処理は、前述したステップS1401-ステップS1408と同様であるので、詳細な説明は省略する。
そして、統合制御コントローラ500は、ステップS1609で、ステップS1609で、車両200が吹き溜まりを走行する際に、吹き溜まりによる走路抵抗で発生するヨーモーメントと逆方向にヨーモーメントを発生させるように、操舵装置210に転舵角の制御指令(第2制御指令)を出力し、吹き溜まりによる走路抵抗で発生するヨーモーメントを相殺させる(図3参照)。
そして、統合制御コントローラ500は、車両前方に吹き溜まりを検知した場合、ステップS1800に進んで、目標軌道に沿って車両200を走行させる軌道追従制御を実施し、更に、次のステップS1900で、車両200が吹き溜まりを走行するときの制御(制御3)を実施する。
図12のフローチャートは、ステップS1900の処理内容(制御3)の詳細を示す。
つまり、統合制御コントローラ500は、ステップS1901で、車両200を吹き溜まり走行用の適正車速まで減速させるための制御指令(第3制御指令)を駆動装置230及び/又は制動装置240に出力する。
そして、吹き溜まりを回避することが可能である場合、統合制御コントローラ500は、ステップS1903に進み、車両200の目標軌道(換言すれば、目標走行軌跡)を、吹き溜まりを回避する軌道に修正し(図4参照)、修正後の目標軌道を車両200がトレースするような舵角指令(第2制御指令)を操舵装置210に出力する。
そして、懸架装置220が正常である場合、統合制御コントローラ500は、ステップS1905に進み、車両200の車高を吹き溜まりに進入する前よりも上げる車高制御を実施して走行安定性を向上させる(図3参照)。
一方、懸架装置220が異常で車高調整が不能である場合、統合制御コントローラ500は、ステップS1905を迂回してステップS1906に進み、車高調整をキャンセルする。
そして、統合制御コントローラ500は、ポットホールを検知した場合、ステップS2100に進んで、目標軌道に沿って車両200を走行させる軌道追従制御を実施する。
図13のフローチャートは、ステップS2200の処理内容(制御4)の詳細を示す。
つまり、統合制御コントローラ500は、ステップS2201で、車両200をポットホール走行用の適正車速まで減速させるための制御指令(第3制御指令)を駆動装置230及び/又は制動装置240に出力する。
そして、ポットホールを回避することが可能である場合、統合制御コントローラ500は、ステップS2203に進み、車両200の目標軌道を、ポットホールを回避する軌道に修正し(図5参照)、修正後の目標軌道を車両200がトレースするような舵角指令(第2制御指令)を操舵装置210に出力する。
そして、懸架装置220が正常である場合、統合制御コントローラ500は、ステップS2205に進み、ポットホールに進入する車輪を持ち上げる車高制御を実施する(図5参照)。
なお、統合制御コントローラ500は、懸架装置220が車高調整可能であるフルアクティブサスペンションであるときに、ステップS2205の車高制御と、ステップS2206の減衰力制御とのいずれか一方を実施することができる。
このように、統合制御コントローラ500は、車両200がポットホールを走行する際に、車輪がポットホールに落ちることを抑止するための制御指令(第1制御指令)を懸架装置220に出力することで、車両200がポットホールを走行する際の安定性を向上させる。
そして、統合制御コントローラ500は、バンプを検知した場合、ステップS2400に進んで、目標軌道に沿って車両200を走行させる軌道追従制御を実施する。
図14のフローチャートは、ステップS2500の処理内容(制御5)の詳細を示す。
つまり、統合制御コントローラ500は、ステップS2501で、車両200をバンプ走行用の適正車速まで減速させるための制御指令(第3制御指令)を駆動装置230及び/又は制動装置240に出力する。
そして、バンプを回避することが可能である場合、統合制御コントローラ500は、ステップS2503に進み、車両200の目標軌道を、バンプを回避する軌道に修正し(図6参照)、修正後の目標軌道を車両200がトレースするような舵角指令(第2制御指令)を操舵装置210に出力する。
そして、懸架装置220が正常である場合、統合制御コントローラ500は、ステップS2505に進み、バンプに進入する車輪を持ち上げる車高制御を実施する(図6参照)。
なお、統合制御コントローラ500は、懸架装置220が車高調整可能であるフルアクティブサスペンションであるときに、ステップS2505の車高制御と、ステップS2506の減衰力制御とのいずれか一方を実施することができる。
このように、統合制御コントローラ500は、車両200がバンプを走行する際に、車体に衝撃が伝わることを抑止するための制御指令(第1制御指令)を懸架装置220に出力することで、車両200がバンプを走行する際の安定性を向上させる。
そして、統合制御コントローラ500は、カーブ路を検知した場合、ステップS2700に進んで、目標軌道に沿って車両200を走行させる軌道追従制御を実施する。
図15のフローチャートは、ステップS2800の処理内容(制御6)の詳細を示す。
つまり、統合制御コントローラ500は、ステップS2801で、車両200をカーブ路走行用の適正車速まで減速させるための制御指令(第3制御指令)を駆動装置230及び/又は制動装置240に出力する。
そして、懸架装置220が正常である場合、統合制御コントローラ500は、ステップS2803に進み、車両200がカーブ路を走行する際に、運転者(乗員)が感じる左右加速度(横加速度)を抑制するための車高制御を実施する。
ここで、統合制御コントローラ500は、カーブ走行中に発生する横加速度を予測し、予測結果に基づき旋回内外輪の車高の差を調整することができる。
また、好ましい実施形態を参照して本発明の内容を具体的に説明したが、本発明の基本的技術思想及び教示に基づいて、当業者であれば、種々の変形態様を採り得ることは自明である。
また、轍路面において、車両200の車高を十分な高さに調整できるときであっても、車両200の目標軌道を轍の中心(左右の轍の間隔の中央)から所定距離だけ左右にオフセットさせることができる。
また、統合制御コントローラ500は、外乱に進入する前の減速制御において目標とする適正車速を、吹き溜まりやバンプの高さ、或いは、轍やポットホールの深さに応じて変更することができる。
また、統合制御コントローラ500は、左右輪の一方がバンプやポットホールを走行することで発生するヨーモーメントと逆方向にヨーモーメントを発生させるように、操舵装置210に転舵角の制御指令(第2制御指令)を出力することができる。
例えば、統合制御コントローラ500は、高さが所定以下である道路上の落下物、道路工事のために路上に置かれた敷板などを外乱としての凸部として検知し、これらの外乱に進入する前に減速制御し、また、これらの外乱を車両200が乗り越えるときに、懸架装置220について車輪を持ち上げる制御及び/又は減衰力を弱める制御を実施したり、凸部を回避する目標軌道に変更して操舵制御を実施したりすることができる。
Claims (19)
- 車両に設けられた懸架装置、操舵装置、及び制駆動装置を制御するための制御指令を求めるコントロール部を備える車両制御装置であって、
前記コントロール部は、
外界認識部から取得した外界情報に基づいて、前記車両が走行する前方の道路状態に関する諸元を取得し、
前記道路状態に関する諸元に基づき求められた前記車両の推定状態量と、前記外界情報に基づく前記車両の速度に関する制御量と、に基づいて前記車両の挙動を制御するための車両挙動制御量を取得し、
前記道路状態に関する諸元に基づき求められた前記車両が走行する目標軌道と、前記推定状態量と、に基づいて前記目標軌道に前記車両を追従させるための軌道追従制御量を取得し、
前記車両挙動制御量と、前記軌道追従制御量と、に基づいて、前記懸架装置を制御するための第1制御指令と、前記操舵装置を制御するための第2制御指令と、前記制駆動装置を制御するための第3制御指令と、を出力する、
車両制御装置。 - 請求項1に記載の車両制御装置であって、
前記コントロール部は、
前記道路状態に関する諸元のうち、路面変位の変化に関する諸元を取得した場合、前記車両が減速するように前記第3制御指令を出力する、
車両制御装置。 - 請求項2に記載の車両制御装置であって、
前記コントロール部は、
前記路面変位の変化に関する諸元のうち、轍に関する諸元を取得した場合、前記車両が前記轍に進入する前に前記車両が減速するように前記第3制御指令を出力する、
車両制御装置。 - 請求項3に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記轍を走行する際に、前記車両の重心位置が前記轍の中心に沿って移動するように前記第2制御指令を出力する、
車両制御装置。 - 請求項4に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記轍を走行する際に、前記車両の車高を上げるように前記第1制御指令を出力する、
車両制御装置。 - 請求項5に記載の車両制御装置であって、
前記コントロール部は、
前記第1制御指令にて所定車高を確保できないと判断された場合、前記目標軌道が前記轍の中心より所定距離オフセットするように前記第2制御指令を出力する、
車両制御装置。 - 請求項4に記載の車両制御装置であって、
前記操舵装置はステアバイワイヤシステムであり、
前記車両が前記轍を走行する際に、前記車両の左右輪のトー角を調整するように前記第2制御指令を出力する、
車両制御装置。 - 請求項2に記載の車両制御装置であって、
前記コントロール部は、
前記路面変位の変化に関する諸元のうち、吹き溜まりに関する諸元を取得した場合、前記車両が前記吹き溜まりに進入する前に前記車両が減速するように前記第3制御指令を出力する、
車両制御装置。 - 請求項8に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記吹き溜まりを走行する際に、前記車両の車高を上げるように前記第1制御指令を出力する、
車両制御装置。 - 請求項8に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記吹き溜まりを走行する際に、前記吹き溜まりによる走路抵抗で発生するヨーモーメントと逆方向のヨーモーメントが発生するように前記第2制御指令を出力する、
車両制御装置。 - 請求項8に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記吹き溜まりを回避できる場合、前記目標軌道を修正する、
車両制御装置。 - 請求項2に記載の車両制御装置であって、
前記コントロール部は、
前記路面変位の変化に関する諸元のうち、バンプ又はポットホールに関する諸元を取得した場合、前記車両が前記バンプ又は前記ポットホールに進入する前に前記車両が減速するように前記第3制御指令を出力する、
車両制御装置。 - 請求項12に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記バンプ又は前記ポットホールを走行する際に、減衰力が制御されるように前記第1制御指令を出力する、
車両制御装置。 - 請求項12に記載の車両制御装置であって、
前記コントロール部は、
前記車両が前記バンプ又は前記ポットホールを回避できる場合、前記目標軌道を修正する、
車両制御装置。 - 請求項1に記載の車両制御装置であって、
前記コントロール部は、
前記道路状態に関する諸元のうち、カーブ路における道路曲率に関する諸元を取得した場合、前記車両が前記カーブ路を走行する際に、前記車両の左右の車高のうち、旋回内側の車高が旋回外側の車高より低くなるように前記第1制御指令を出力する、
車両制御装置。 - 請求項1に記載の車両制御装置であって、
前記コントロール部は、
前記道路状態に関する諸元のうち、前記路面変位に関する諸元と前記道路形状に関する諸元とに基づいて前記車両が走行する前方の路面状態を判断し、
前記路面状態のうちの外乱に関する諸元と、前記道路形状に関する諸元と、に基づいて前記目標軌道を取得する、
車両制御装置。 - 請求項16に記載の車両制御装置であって、
前記コントロール部は、
前記路面状態に基づいて前記推定状態量を取得し、
前記推定状態量のうちの前記車両の推定車速を含む状態量と、前記目標軌道と、前記車両の速度に関する制御量と、に基づいて前記車両挙動制御量を取得し、
前記推定状態量のうちの前記車両の自己位置と、前記目標軌道と、に基づいて前記軌道追従制御量を取得する、
車両制御装置。 - 車両に設けられた懸架装置、操舵装置、及び制駆動装置を制御するための制御指令を求める車両制御方法であって、
外界認識部から取得した外界情報に基づいて、前記車両が走行する前方の道路状態に関する諸元を取得し、
前記道路状態に関する諸元に基づき求められた前記車両の推定状態量と、前記外界情報に基づく前記車両の速度に関する制御量と、に基づいて前記車両の挙動を制御するための車両挙動制御量を取得し、
前記道路状態に関する諸元に基づき求められた前記車両が走行する目標軌道と、前記推定状態量と、に基づいて前記目標軌道に前記車両を追従させるための軌道追従制御量を取得し、
前記車両挙動制御量と、前記軌道追従制御量と、に基づいて、前記懸架装置を制御するための第1制御指令と、前記操舵装置を制御するための第2制御指令と、前記制駆動装置を制御するための第3制御指令と、を出力する、
車両制御方法。 - 車両に設けられた懸架装置と、
前記車両に設けられた操舵装置と、
前記車両に設けられた制駆動装置と、
前記車両の外界情報を取得する外界認識装置と、
前記懸架装置、前記操舵装置、及び前記制駆動装置を制御するための制御指令を求めるコントローラであって、
前記外界認識装置から取得した外界情報に基づいて、前記車両が走行する前方の道路状態に関する諸元を取得し、
前記道路状態に関する諸元に基づき求められた前記車両の推定状態量と、前記外界情報に基づく前記車両の速度に関する制御量と、に基づいて前記車両の挙動を制御するための車両挙動制御量を取得し、
前記道路状態に関する諸元に基づき求められた前記車両が走行する目標軌道と、前記推定状態量と、に基づいて前記目標軌道に前記車両を追従させるための軌道追従制御量を取得し、
前記車両挙動制御量と、前記軌道追従制御量と、に基づいて、前記懸架装置を制御するための第1制御指令と、前記操舵装置を制御するための第2制御指令と、前記制駆動装置を制御するための第3制御指令と、を出力する、
コントローラと、
を備える車両制御システム。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/641,562 US12252111B2 (en) | 2019-11-28 | 2020-11-24 | Vehicle control device, vehicle control method, and vehicle control system |
| JP2021561422A JP7320074B2 (ja) | 2019-11-28 | 2020-11-24 | 車両制御装置、車両制御方法、及び車両制御システム |
| CN202080064630.9A CN114390979A (zh) | 2019-11-28 | 2020-11-24 | 车辆控制装置、车辆控制方法及车辆控制系统 |
| EP20891799.7A EP4067126B1 (en) | 2019-11-28 | 2020-11-24 | Vehicle control device, vehicle control method, and vehicle control system |
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| JP2019215350 | 2019-11-28 | ||
| JP2019-215350 | 2019-11-28 |
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| EP (1) | EP4067126B1 (ja) |
| JP (1) | JP7320074B2 (ja) |
| CN (1) | CN114390979A (ja) |
| WO (1) | WO2021106873A1 (ja) |
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| JP2024056543A (ja) * | 2022-10-11 | 2024-04-23 | 日立Astemo株式会社 | サスペンション制御装置およびサスペンション制御方法 |
| US20240208290A1 (en) * | 2022-12-27 | 2024-06-27 | Hyundai Mobis Co., Ltd. | Apparatus for and method of controlling vehicle suspension |
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| JP2023057397A (ja) * | 2021-10-11 | 2023-04-21 | トヨタ自動車株式会社 | 車両 |
| JP7635694B2 (ja) | 2021-10-11 | 2025-02-26 | トヨタ自動車株式会社 | 車両 |
| WO2023214023A1 (en) * | 2022-05-05 | 2023-11-09 | Jaguar Land Rover Limited | Control system and method for vehicle suspension |
| GB2632373A (en) * | 2022-05-05 | 2025-02-05 | Jaguar Land Rover Ltd | Control system and method for vehicle suspension |
| GB2632373B (en) * | 2022-05-05 | 2025-07-23 | Jaguar Land Rover Ltd | Control system and method for vehicle suspension |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7320074B2 (ja) | 2023-08-02 |
| US20220332306A1 (en) | 2022-10-20 |
| EP4067126B1 (en) | 2024-08-28 |
| EP4067126A4 (en) | 2022-12-28 |
| CN114390979A (zh) | 2022-04-22 |
| US12252111B2 (en) | 2025-03-18 |
| JPWO2021106873A1 (ja) | 2021-06-03 |
| EP4067126A1 (en) | 2022-10-05 |
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