JPH11355221A - Command telemetry automatic check method and device - Google Patents

Abstract

(57) [Summary] [Problem] To check whether telemetry is correctly changed is repeated off-line and non-real-time so that it can be flexibly performed. SOLUTION: An operation of an operator 3 causes a ground device 2 to be operated.
, The telemetry is returned from the spacecraft 1 to the ground apparatus 2 and stored in the reception telemetry file 2b. The ground apparatus 2 obtains the command transmission number (or command code) and the telemetry collation condition by referring to the command / telemetry collation condition table 2a. Then
The received telemetry file 2b is scanned using the command transmission number (or command code) as a key, a telemetry item referenced by the telemetry collation condition is found, a check is performed based on the collation condition, and the result is notified to the operator 3. Further, a comparison upper limit time set in advance and a difference between the telemetry reception time and the command reception time may be compared to determine a collation failure or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically checking command telemetry in a spacecraft system such as an artificial satellite. Confirmation that the spacecraft is functioning normally in orbit is basically based on whether the telemetry returned from the spacecraft to the ground equipment in response to the command sent from the ground equipment to the spacecraft is correct Is performed by checking. This check is performed for items critical to the spacecraft, such as attitude data, by visually confirming the telemetry returned from the spacecraft each time a command is issued. For telemetry items that are not so fatal and have a large amount of data, such as observation mission data, it is not efficient and time-consuming to visually check whether all telemetry has changed correctly. Take it. It is very likely that a mistake will be made. Therefore, it has been considered to perform such a check automatically.

[0002]

2. Description of the Related Art FIG. 4 is a diagram for explaining a conventional technique. In FIG. 1, reference numeral 10 denotes a spacecraft such as a satellite, and reference numeral 20 denotes a ground device. The ground device 20 is provided with a command / telemetry collation condition table 21 which holds telemetry collation conditions to be checked for each transmitted command. An operator 30 operates the spacecraft, and the ground device 20 transmits a command to the spacecraft 10 by the operation of the operator 30. The spacecraft 10 performs processing according to the transmitted command, collects predetermined information, and transmits the information to the ground apparatus 20 as telemetry.

Conventionally, in order to automatically check whether the telemetry returned from the spacecraft 10 to the ground equipment 20 in response to a command transmitted from the ground equipment 20 to the spacecraft 10 is shown in FIG. As described above, when the operator 30 instructs the ground device 20 to transmit a command,
A method in which the command / telemetry matching condition table 21 is searched to obtain matching conditions, and when the telemetry corresponding to the command is sent back from the spacecraft 10, it is checked whether the telemetry satisfies the conditions. Was taking.

[0004]

In the above-described system, the telemetry check can be performed only at the time of transmitting the command. Therefore, after the command transmission and the corresponding telemetry reception processing have been completed, it is not possible to increase the number of telemetry items to be collated and perform a more detailed check again. This is a problem, for example, when there is a possibility that a fault has occurred on the spacecraft side and the fault is not sufficiently reproducible. The present invention has been made in view of the above circumstances, and an object of the present invention is to correct the telemetry returned from the spacecraft to the ground equipment in response to the command transmitted from the ground equipment to the spacecraft. The purpose of this is to make it possible to flexibly check whether or not there is an off-line or non-real-time operation.

[0005]

FIG. 1 is a diagram illustrating the principle of the present invention. In the figure, 1 is a spacecraft such as an artificial satellite, 2
Is a ground device, 3 is an operator, and the ground device 2 is a command / telemetry collation condition table 2a and a spacecraft 1
It has a reception telemetry file 2b for storing telemetry transmitted to the ground apparatus 2 from the mobile station, and a collating means 2c. In FIG. 1, the inventions according to claims 1 and 2 of the present invention solve the above-mentioned problem as follows. (A) When the ground device 2 transmits a command to the spacecraft 1 by the operation of the operator 3, the spacecraft 1 performs a process according to the transmitted command, collects predetermined information, and performs telemetry on the ground device. Return to 2. (B) The ground apparatus 2 sequentially stores the telemetry transmitted from the spacecraft 1 in the reception telemetry file 2b in the order of reception. (C) The collation means 2c of the ground apparatus 2 automatically checks the telemetry as follows at an arbitrary time pointed by the operator 3 after the command transmission and the telemetry reception are completed. (C1) The command transmission number (or command code) and the telemetry collation condition are obtained by referring to the first entry of the command / telemetry collation condition table 2a. (C2) From the beginning of the received telemetry file 2b, a packet including command information is scanned using the command transmission number (or command code) as a key, and a packet having the same command transmission number (or command code) is found. (C3) Scanning is performed on the packet found in (c2) above using the telemetry item referenced by the telemetry collation condition as a key, and if the referenced telemetry is found, the telemetry is performed according to the command based on the collation condition. Is changed correctly, and the result is notified to the operator 3. (C4) The process moves to the next entry of the command / telemetry collation condition table, and the processes from (c1) to (c3) are repeated until the last entry of the command / telemetry collation condition table 2a.

In the invention of claim 3 of the present invention, the upper limit time of collation is stored in the command telemetry collation condition table 2a, and the upper limit time of collation, [telemetry reception time]-[command reception time] ] To determine the collation failure and notify the operator 3 or continue the processing from the next packet. That is, in the above (c1), the command / telemetry collation condition table 2a
When referring to this entry, the upper limit of the collation time is also read from the entry of the command / telemetry collation condition table 2a and stored, and when a packet is found in the above (c2), the time information added to this packet is stored. ,
[Telemetry reception time]-[Command reception time] is compared with the upper limit collation time of the command / telemetry collation condition table 2a, and the above processing is performed.

[0007]

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. Compared with the configuration diagram according to the prior art shown in FIG. 4, in this embodiment, a reception telemetry file 22 for storing telemetry received from a spacecraft is added. Further, the command / telemetry collation condition table 21 is referred to by the operator 30.
Is different from the command transmitted from the receiving telemetry file 22 in that the command is retrieved not from the command transmitted from the receiving telemetry file 22. FIG. 3 is a diagram for explaining the operation of the embodiment of the present invention. In the drawing, reference numeral 22 denotes an example of a received telemetry file, in which telemetry transmitted from the spacecraft 10 is sequentially stored in the order received by the ground apparatus 20. Normally, telemetry from the spacecraft 10 is compiled into data (packets) for each type of telemetry and transmitted to the ground apparatus 20. The type of the packet can be identified by the information included in the header H at the head of the packet.

In this embodiment, it is necessary that the packet transmitted from the spacecraft 10 includes command information on the command transmitted from the ground apparatus. This information may be any of a command transmission number indicating the order of the transmitted command from the beginning, or the transmitted command code itself (= answer back). Also, when checking the reception time,
Each packet must include the time that elapses on the spacecraft. This time information is determined based on a fixed reference, such as the time at which the spacecraft finished editing the telemetry, and there is no further restriction as long as the time monotonically increases for all packets.

Reference numeral 21 denotes a command telemetry collation condition table. This table is created in advance by an operator, and one entry corresponds to one command, and entries are sequentially created in the order in which the commands are transmitted to the spacecraft. Each entry is a command transmission number indicating the number of the command transmitted from the beginning, the code of the transmitted command, telemetry items and values to be checked after transmitting the command, and telemetry collation conditions indicating conditions Field. In addition, the command transmission number and the code of the transmitted command may be any one. When the reception time is collated, the command / telemetry collation condition table 21 is provided with a collation upper limit time field for designating an approximate time from when the reception of the command is detected to when the collation processing for the command is terminated. is necessary.

Next, the command telemetry check according to the present embodiment will be described with reference to FIGS. a) The ground device 20 transmits a command to the spacecraft 10 by the operation of the operator 30. b) The spacecraft 10 performs processing according to the transmitted command, collects predetermined information, and returns it to the ground equipment 20 as telemetry. c) The ground equipment 20 sequentially stores the telemetry transmitted from the spacecraft 10 in the reception telemetry file 22 in the order of reception.

D) The ground device 20 automatically checks the telemetry according to the following procedure at an arbitrary point in time specified by the operator 30 after the command transmission and the telemetry reception are completed. With reference to the first entry of the command telemetry collation condition table 21, a command transmission number (or command code) and a telemetry collation condition are obtained. When the reception time is to be verified, the upper limit of the verification time is also read from the command / telemetry verification condition table 21 and stored. From the beginning of the reception telemetry file 22, a packet including command information is scanned using the command transmission number (or command code) as a key, and a packet having the same command transmission number (or command code) is found. Further, when the reception time is compared, the time information added to this packet is stored as “command reception time”. The subsequent packets found above are scanned using the telemetry item referenced by the telemetry collation conditions as a key. Then, if the referenced telemetry is found, the telemetry value is checked according to the condition (equal value, not matching, etc.),
The result is notified to the operator 30, and the process proceeds to.

For example, in FIG. 3, the collation condition of the command 2 is “data in a specific area of the telemetry 20 is“ 2 ”.
0 "and the data in a specific area of the telemetry 21 is not equal to" 21 ", and the reception telemetry file 22 is scanned to find the telemetry 20 and the telemetry 21, and these telemetry 20, 21
Check whether the above conditions are satisfied, and notify the operator 30 of the result. Further, when the reception time is compared, at the time of scanning the packet, the time information added to each packet is read as "telemetry reception time", and [telemetry reception time]-[command reception time]> In the case of [upper-match time], even if a packet including the referenced telemetry item has not been found yet, it is determined that the matching has failed, the operator is notified, and the process proceeds to. For example, the reception times of the telemetry 20 and 21 corresponding to the command 2 are “time 5” and “time 6”.
Further, since the upper limit time of collation of the command 2 is “16”, if [time 6] − [time 3]> 16, it is determined that the collation has failed and the operator is notified. Also, if the telemetry corresponding to the command 2 is not found even at [time 2] +16, it is determined that the collation has failed and the operator 3
Notify 0.

If the packet referred to is found as required, but the matching condition is not satisfied,
If [telemetry reception time]-[command reception time] <[collation upper limit time], it is possible to determine that collation has not failed, return to the top, and continue processing from the next packet. is there. That is, usually, telemetry is repeatedly returned from the spacecraft 10 a plurality of times, and the telemetry received immediately after transmitting the command may be the telemetry corresponding to the command transmitted before that. Therefore, as described above, if [telemetry reception time]-[command reception time] <[collation upper limit time], the process returns to the beginning of the sequence and performs collation repeatedly until the telemetry corresponding to the transmitted command is returned. You may wait.

Moving to the next entry in the command / telemetry collation condition table,
Repeat until the last entry of the command / telemetry collation condition table 21. According to the above procedure, it is possible to check whether or not the telemetry has been correctly changed in response to the command only from the telemetry transmitted from the spacecraft. Also, by comparing the reception time with the upper limit of the matching time, if a packet containing a telemetry item to be matched cannot be found, or if a command is received and it takes time for the effect to appear in the telemetry. In this case, a flexible check can be performed.

[0015]

As described above, according to the present invention, the telemetry transmitted from the spacecraft to the ground equipment is stored in the reception telemetry file, and the command transmission number or the answer of the command included in the command telemetry is stored. Using the back, from the received telemetry file, the telemetry corresponding to the command transmitted from the ground equipment to the spacecraft is detected, and it is checked whether the detected telemetry is correctly changed according to the command. In response to commands sent from the ground equipment to the spacecraft, it is possible to flexibly check whether the telemetry returned from the spacecraft to the ground equipment is correctly changed in off-line / non-real-time and flexibly . Further, by using the elapsed time on the spacecraft included in the telemetry transmitted from the spacecraft to the ground device, a time from when the spacecraft detects the reception of the command to when the matching of the corresponding telemetry is completed is obtained. By collating the calculated time with the maximum collation time, if a packet containing a telemetry item to be collated is not found, or if it takes a long time for the effect to appear in telemetry after receiving a command Also, a flexible check can be performed.

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is a configuration diagram of a system according to the present embodiment.

FIG. 3 is a diagram illustrating the operation of the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a conventional system.

[Description of Signs] 1,10 Spacecraft 2,20 Ground Equipment 2a, 21 Command / Telemetry Matching Condition Table 2b, 22 Received Telemetry File 2c Matching Means 3,30 Operator

Claims (3)

[Claims] An automatic command / telemetry check method in a system including a spacecraft such as an artificial satellite and a ground device for operating the spacecraft, wherein a telemetry transmitted from the spacecraft to the ground device is stored in a reception telemetry file. Then, using the command transmission number or the answerback of the command included in the command telemetry, from the reception telemetry file,
An automatic command / telemetry checking method, comprising detecting telemetry corresponding to a command transmitted from a ground device to a spacecraft, and checking whether the detected telemetry is correctly changed according to the command. 2. A system comprising a spacecraft such as an artificial satellite and a terrestrial device for operating the spacecraft, wherein the terrestrial device stores a command telemetry collation condition table and telemetry transmitted from the spacecraft to the terrestrial device. The receiving telemetry file is provided with matching means for checking whether the received telemetry satisfies the conditions. The checking means uses a command transmission number or an answerback of a command included in the command telemetry to execute the above. From the received telemetry file, telemetry corresponding to the command transmitted from the ground equipment to the spacecraft is detected, and the detected telemetry is compared with the matching conditions in the command / telemetry matching condition table, so that the telemetry changes correctly according to the command A feature that checks whether the De telemetry automatic checking device. 3. A command / telemetry collation condition table stores a collation upper limit time, and the collation means uses an elapsed time on the spacecraft included in the telemetry transmitted from the spacecraft to the ground apparatus, 3. The automatic command telemetry checking device according to claim 2, wherein a time from when the spacecraft detects the reception of the command to when the matching of the corresponding telemetry is completed is obtained, and the obtained time is compared with the matching upper limit time.