Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
  • F41A27/00—Gun mountings permitting traversing or elevating movement, e.g. gun carriages
  • F41A27/28—Electrically-operated systems

Definitions

• the invention relates to a targeting system for a rocket launcher, in particular a targeting system for aligning the rockets when firing at a predetermined target.
• the functional elements of a conventional straightening system are shown in Fig. 1.
• the output line 10 of a motor 9 drives the input line 8 of a safety brake device which closes under load.
• the engine in the military missile launchers is a hydraulic engine.
• the rocket launcher installed on a vehicle is referred to below as a load.
• the output shaft 10 of the safety braking device is connected to the load.
• the load itself is not shown in this description.
• the function of the safety braking device is to to keep the load driving down even in the event of failure or incorrect control of the holding brake on the motor (the holding brake on the motor is not shown in FIG. 1) or failure or malfunction of the drive motor and to prevent it from falling uncontrollably. Furthermore, when the unbalanced load is lowered, the brake converts the potential energy into heat that would otherwise heat up the oil.
• an improved type of hydraulic drive is also known, the oil being conveyed into a pressure container when the load is lowered in order to store the potential energy.
• the back pressure of this accumulator is also used to brake the falling load if the motor control fails or the motor malfunctions.
• Hydraulic oil must be disposed of drive efficiency is low, noise is high and oil is flammable.
• this safety brake device for the individual operating states is described in detail below with reference to FIG. 1.
• the invention can also be used with other safety brake devices.
• the output shaft 1 of the braking device is toothed with an inner disk carrier 2 of a disk brake.
• the output shaft 1 and the inner disk carrier 2 can be axially displaced relative to one another, but the two shafts 1 and 2 are connected to one another in the radial direction.
• the multi-disc brake 3 is closed by the bias of a torsion spring 4, which rotates the two shafts 2 and 8, by the action of the inclined surfaces 5 and 5 '.
• the outer plate carrier 6 is supported on a backstop 7, which does not allow rotation in the direction - load downwards. The brake is now effective and the rocket launcher is held in its position.
• the drive shaft 8 is driven by the motor against the load.
• the multi-disc brake is further compressed by the inclined surfaces 5 and 5 ' remains closed as long as the load is pointing downwards.
• the outer disks of the disk brake are supported in a disk carrier 6 against rotation.
• This disk carrier 6 is in turn connected to a freewheel 7.
• This freewheel 7 is freely rotatable in the direction - load upwards. The brake device can thus rotate freely with the motor and raise the load.
• the drive shaft 8 turns the closed brake against the bias of the torsion spring 4 until the inclined surfaces 5 and 5 'release the pressure on the brake discs and the torque of the brake is less than the torque of the load driving downwards.
• the output shaft 1 can only rotate as fast as the shaft 8 is driven. As soon as the load tries to overtake the shaft 8, the brake is over the inclined surface 5 and 5 ! closed and the brake is closed.
• the safe support of the load achieved with this device could also be achieved with a self-locking gear or a self-locking spindle or screw installed in the drive train.
• the advantage of the safety brake according to the prior art described above, compared to such a self-locking transmission, is that the device described has a much better efficiency when lifting the load than, for example, would be the case with a self-locking snail.
• a major disadvantage of the above-described design with the safety brake, as with any self-locking transmission, is, however, that when the load is lowered, the potential energy contained in the load is completely converted into friction energy.
• the brake wears out and the brake heats up. Wear limits the number of operations of the straightening system and thus the service life of the brake.
• the heating of the system also limits the Number of successive downward straightening processes.
• the braking work per unit time of each friction brake is limited, which limits the speed when lowering the load.
• the object of the invention is to provide a straightening system for a rocket launcher which avoids the disadvantages mentioned above.
• the drive for straightening a weapon system uses a self-closing safety brake device and an electric motor arranged on the output shaft of the safety brake device, the electric motor being controlled in such a way that it supports the previous drive when the load is lifted and energy is recovered when the load is lowered allows.
• the energy for the straightening process is taken from the vehicle battery.
• the battery is discharged when the load is started. Lowering the load requires less energy from the battery than starting it up, but conventionally, no energy could be returned to the battery. Therefore, the battery had to be charged by the vehicle's internal combustion engine after a short time, which led to undesirable noise generation. According to the invention, rapid battery discharge and undesirable noise generation can be avoided.
• the straightening system according to the invention uses a conventional safety brake for the greatest possible safety and also the advantages of electrical drive technology.
• control of the drive motor is designed such that it is only used to open the safety brake when lifting, while the additional electric motor can be controlled such that it causes the torque to lift the load.
• control of the additional electric motor is designed in such a way that it only brings about an additional torque when particularly high torques are required to lift the load.
• control of the drive motor is designed such that it is controlled with the same control law when the load is raised and lowered, while the control of the additional electric motor is designed such that it is controlled with a non-linear control law.
• FIG. 1 is a sectional view of the structure of a drive of a conventional safety brake for a straightening system
• Fig. -2 is a sectional view of an improved drive of a straightening system
• Fig. 3 is a block diagram for controlling a straightening system according to the invention with electric motors.
• FIG. 2 shows a safety brake according to FIG. 1 with a further motor 11, which acts on the output shaft 1 of the brake.
• the idle state carried out in the prior art - holding the load against the weight - is carried out by the same elements as described in connection with FIG. 1.
• the raising of the weapon is carried out by both motors 9 and 11.
• the motor torques are summed up mechanically.
• the load is advantageously lowered as follows:
• the motor 9 must open the safety brake by rotating it.
• the downward movement of the load cannot take place faster than is specified by the rotation of the brake by this motor 9.
• the energy required on the motor 9 is always positive, that is to say the motor requires energy from the power supply to open the brake and, due to the function of the safety brake already described, cannot work in generator mode.
• the driving potential energy of the load is converted into heat in the brake.
• the motor 11 is controlled to operate in generator mode when the load is shut down and at least a portion of the potential energy of the load into the power source i.e. the battery of the straightening system, preferably the vehicle battery, feeds back.
• the power source i.e. the battery of the straightening system, preferably the vehicle battery.
• FIG. 3 shown block diagram used. It describes the main mechanical and electrical functional elements of the drive system as transmission blocks and the interaction of the blocks as connecting lines.
• a target signal 12 for the position of the rockets during launch which e.g. is calculated by a fire control computer, specifies the position of the load.
• the current position 13 of the load is determined with a position transmitter (not shown) and compared with the target signal 12 in order to calculate a position error signal 14.
• the position controller 15 transmits a signal 16, which is dependent on the size of the position deviation 14, as the speed setpoint 16.
• This speed setpoint 16 is compared with the motor speed 17 measured on the motor 9 '.
• the difference between the two signals 16 and 17 is passed on to the speed controller 19 as a speed error signal 18.
• the motor 9 ' is identical to the motor 9 shown in FIGS. 1 and 2.
• the speed controller 19 transmits a signal 20 which is dependent on the error signal 18 to the current controller 21 of the motor 9 '.
• the motor 9 ' generates the motor torque 23 v from the current predetermined by the current controller, which sets the output shaft 24 to rotate at the speed 17 depending on the counter torque acting.
• the control of the motor 9 ' is thus carried out according to the principle of cascade control known in the art.
• the output of the current regulator 22 specifies the current required for the movement of the motor 9 ′. It is irrelevant whether the motor is a three-phase current or a direct current motor.
• the output torque 23 of the motor is determined in each case by an electrical current associated with the motor.
• the torque 23, which the engine outputs, is in the drive shaft of the engine 10 and with this connected mechanical parts 24 converted into a rotation, which is measured as speed 17 and compared as described with the speed setpoint 16 of the motor
• the current setpoint signal 20 is also forwarded in the system according to this invention via a non-linear signal transmission block 25 to the control circuit of the second motor 11 '.
• a signal 26 is formed depending on the size and sign of the current setpoint 20 '.
• a signal 26 proportional to the signal 20' with the same sign as the current setpoint 20 ' is formed.
• no signal is forwarded, then a proportional negative signal.
• a torque driving upward in the direction of the load is generated.
• a current value 28 that is proportional to the signal 20 is offered to the current controller 28 of the second motor 11.
• This positive current setpoint 26, as defined by the motor 11 ', causes a torque on the load which acts in the same direction upwards as the torque of the motor 9'.
• the transmission blocks of the control circuit for the motor 11 ' namely the current regulator 28, the motor 11' and the mechanical parts 29 connected to the motor 11 ', effect the rotation of the motor, just like the control circuit described for the motor 10'.
• the speed of the motor 11 ' is also measured and the speed signal 32 is offered to the speed controller 30 with a negative sign.
• the speed controller 30 is not offered a speed setpoint, ie the setpoint is always zero.
• the speed controller 30 does not pass on an output value 29 to the current controller 28 at positive speeds, that is, when the motor rotates in the direction of the load upwards. This ensures that the current controller 28 in this direction of rotation the setpoint is specified only by the setpoint 26, which is derived from the current setpoint of the current controller 19.
• the rotation of the motor 11 ' is converted into a torque 34 via the mechanical parts 33.
• the rotation of the motor 9 ' is also converted into a torque 36 via mechanical parts 35.
• Both torques form a common torque 37 driving the load.
• the summed torques 37 of the two motors accelerate the load when the sum of these torques is greater than the driving torques 38 of the load.
• the magnitude of the driving torques of the load 38 depends on the position of the load and on the number of rockets on the rocket launcher, as indicated in the transmission block 39.
• the structure of the control according to this functional model takes into account all load conditions.
• the behavior of the control is described below for the individual operating states.
• a current is specified for both motors 9 'and 11', which increases until the load moves upwards.
• the speed controller 30 of the motor 11 'does not intervene in the control, since the output 29 is zero for this operating state.
• Both motors obey the setpoint value, which is generated by the controllers 15 and 19 of the motor 9 as a result of the control deviations 14 and 16.
• the motor 9 ' is given a current which is sufficient to open the safety brake and to rotate it in the load- ⁇ -down direction.
• the load follows the speed of the motor 9 'and cannot overtake it.
• the motor 11 ' is not on the signal 26 controlled as long as the load follows the engine speed.
• the output value of the transmission block 25 remains zero.
• the motor 11 ' is driven via the mechanical connection with the load in the direction of the load after.
• the speed of the engine 1 1 ' is measured and fed to the speed controller 30 via the signal 32.
• the speed controller 30 tries to regulate the speed to zero since there is no setpoint for the speed.
• a counter torque to the driving load is built up as a function of the speed in the motor 11 '.
• the engine 1 1 ' works in generator mode, i.e. electrical energy is fed back into the battery and the load is also slowed down.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Gyroscopes (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
• Studio Devices (AREA)
• Toys (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Motorcycle And Bicycle Frame (AREA)
• Photoreceptors In Electrophotography (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=27588229

Family Applications (1)

Country Status (8)

Families Citing this family (4)

Family Cites Families (16)

• 2002
  • 2002-02-01 DE DE10204052A patent/DE10204052A1/de not_active Withdrawn
• 2003
  • 2003-01-28 DE DE50307954T patent/DE50307954D1/de not_active Expired - Lifetime
  • 2003-01-28 US US10/483,588 patent/US7143681B2/en not_active Expired - Fee Related
  • 2003-01-28 EP EP03704261A patent/EP1470384B1/fr not_active Expired - Lifetime
  • 2003-01-28 WO PCT/DE2003/000220 patent/WO2003064958A1/fr not_active Ceased
  • 2003-01-28 AT AT03704261T patent/ATE370381T1/de not_active IP Right Cessation
  • 2003-01-28 DK DK03704261T patent/DK1470384T3/da active
  • 2003-01-28 ES ES03704261T patent/ES2290428T3/es not_active Expired - Lifetime
  • 2003-09-24 NO NO20034262A patent/NO327469B1/no not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events