CN113794522B - System and method for testing capture time index of spacecraft measurement and control transponder - Google Patents
System and method for testing capture time index of spacecraft measurement and control transponder Download PDFInfo
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- CN113794522B CN113794522B CN202110975741.1A CN202110975741A CN113794522B CN 113794522 B CN113794522 B CN 113794522B CN 202110975741 A CN202110975741 A CN 202110975741A CN 113794522 B CN113794522 B CN 113794522B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/59—Responders; Transponders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
Abstract
The application provides a system and a method for testing capturing time indexes of a spacecraft measurement and control transponder.A measurement and control baseband device generates an uplink intermediate frequency remote control signal which is sent to an up-converter, and the up-converter converts the uplink intermediate frequency remote control signal and sends the uplink intermediate frequency remote control signal to an uplink radio frequency link; the uplink radio frequency link attenuates the power of the uplink remote control signal and sends the power to the spacecraft measurement and control transponder; the downlink radio frequency link receives a downlink telemetry signal sent by the spacecraft measurement and control transponder, attenuates the downlink telemetry signal and sends the downlink telemetry signal to the down converter; the down converter down converts the attenuated down telemetry signal into a down intermediate frequency telemetry signal and outputs the down intermediate frequency telemetry signal to the measurement and control baseband equipment; the telemetry analysis device is used for receiving the telemetry data frame demodulated by the measurement and control baseband device, analyzing the telemetry data frame, extracting the locking state telemetry and sending the locking state telemetry to the capturing time measurement device; the capture time measuring device is used for measuring the capture time of the spacecraft measurement and control transponder. The application is beneficial to simplifying manual operation and improving test efficiency and measurement accuracy.
Description
Technical Field
The application relates to the technical field of spacecraft testing, in particular to a system and a method for testing capturing time indexes of a spacecraft measurement and control transponder.
Background
The capturing time is one of important technical indexes of the spacecraft measurement and control transponder, and is the time length from the receiving of the remote control signal to the completion of the locking state of the spacecraft measurement and control transponder. In the past, the measurement of the capture time index of the spacecraft measurement and control transponder needs to be completed through a series of complicated operations such as manually starting the remote control signal output, starting the stopwatch, observing the locking state telemetry of the measurement and control transponder, stopping the stopwatch, stopping the remote control signal output, and the like, has low automation degree and test efficiency, and is easy to introduce time errors caused by manual operation and state judgment. The application is designed for improving the test efficiency and the measurement accuracy of the capture time of the spacecraft measurement and control transponder.
Through the search of the prior art, the patent of the application with the authorized bulletin number of CN 203950040U and the patent name of a quick capture structure of satellite-borne spread spectrum transponder pseudo code discloses a quick capture structure of satellite-borne spread spectrum transponder pseudo code, which at least comprises: the scheme is to design a pseudocode capturing structure of a satellite-borne spread spectrum transponder and does not relate to a testing method of capturing time of the transponder. The application patent with the application publication number of CN 105306095A and the patent name of a method and a system for rapidly capturing a relay satellite measurement and control system signal discloses a method and a system for rapidly capturing a relay satellite measurement and control system signal, wherein the method comprises the steps of S1 analog-to-digital conversion, and bandpass sampling of an analog intermediate frequency signal by a comprehensive digital baseband device through a high-speed analog-to-digital converter to obtain a digital intermediate frequency signal; s2, downsampling treatment; s3, realizing that the capturing processing time is smaller than the data sampling time, controlling the two memories to realize seamless caching of the data stream, wherein the caching depth is the number of sampling points for coherent integration, and the switching interval between the two memories is the sampling time for capturing data; s4, searching a dynamic range of the signal is achieved, the frequency searching unit outputs a frequency searching unit result according to a data sampling period, the frequency searching convergence Doppler frequency range is adopted for 2 rounds, and the code phase offset of the cache data is obtained in the phase searching of the 3 rd round. The scheme describes a method and a system for capturing signals of a relay satellite measurement and control system, and does not relate to a test system and a method for measuring and controlling the capturing time of a transponder. The application discloses a rapid capturing method for deep space measurement and control signals, which is disclosed in the patent with the application publication number of CN 105429918A, and has the patent name of a rapid capturing method for deep space measurement and control signals, and the method is as follows: firstly, carrying out digital down-conversion and down-sampling treatment on a deep space measurement and control signal so that the sampling rate meets the sampling theorem, carrying out FFT (fast Fourier transform) on the down-sampled signal, and carrying out signal detection in a frequency domain; secondly, a multiphase filtering channelized receiver is adopted to further carry out parallel down-conversion and down-sampling processing on the measurement and control signal, and the measurement and control signal with a larger uncertainty range is divided into a plurality of parallel sub-bands; and finally, for each parallel sub-band, a frequency domain compensation method based on FFT is adopted to finish the rapid acquisition of the frequency of the measurement and control signal, and the frequency estimation output is sent to a phase-locked loop. The scheme does not relate to a method for testing the capture time of the measurement and control transponder.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a spacecraft measurement and control transponder capturing time index test system and method.
The application provides a spacecraft measurement and control transponder capture time index test system, which comprises an uplink radio frequency link, a downlink radio frequency link, an up-converter, a down-converter, measurement and control baseband equipment, telemetry analysis equipment and capture time measurement equipment, wherein:
the uplink intermediate frequency remote control signal generated by the measurement and control baseband equipment is sent to an up-converter, and the up-converter converts the uplink intermediate frequency remote control signal and sends the uplink intermediate frequency remote control signal to an uplink radio frequency link; the uplink radio frequency link attenuates the power of the uplink remote control signal and sends the power to the spacecraft measurement and control transponder;
the downlink radio frequency link receives a downlink telemetry signal sent by the spacecraft measurement and control transponder, attenuates the downlink telemetry signal and sends the downlink telemetry signal to the down converter; the down converter down converts the attenuated down telemetry signal into a down intermediate frequency telemetry signal and outputs the down intermediate frequency telemetry signal to the measurement and control baseband equipment;
the telemetry analysis equipment receives the telemetry data frame demodulated by the measurement and control baseband equipment, analyzes the telemetry data frame, extracts the locking state telemetry of the spacecraft measurement and control transponder from the telemetry data frame, and sends the locking state telemetry to the capture time measurement equipment;
the capture time measuring device is used for measuring the capture time of the spacecraft measurement and control transponder and sending a remote control request to the measurement and control baseband device.
Preferably, the measurement and control baseband device supports remote control signal generation and telemetry signal demodulation of two measurement and control modes: a unified carrier measurement and control mode and a direct sequence spread spectrum measurement and control mode; and the two measurement and control modes are multiplexed in a time-sharing way.
Preferably, the measurement and control baseband device can receive a control request sent by the capture time measurement device through the measurement and control local area network, wherein the control request type comprises starting of remote control signal output and stopping of remote control signal output, and the measurement and control baseband device performs corresponding setting according to the control request type:
when the type of the received control request is that the remote control signal output is started, starting to output the remote control signal, and if a Doppler frequency scanning state is to be applied to the remote control signal, presetting a number frequency scanning range and a frequency scanning rate;
and stopping outputting the remote control signal when the received control request type is that the remote control signal output is stopped.
Preferably, the telemetry analysis device extracts the telemetry of the locking state of the measurement and control transponder from the telemetry data frame by the following steps:
presetting a telemetry data packet type identifier of a telemetry channel in a locked state of a measurement and control transponder, and setting the position and telemetry bit width of the telemetry channel in the locked state of the measurement and control transponder in a telemetry data packet data area of a corresponding type;
after the telemetry analysis equipment receives the telemetry data frame, various independent telemetry data packets are extracted from the effective data area of the telemetry data frame according to the telemetry data packet format and the telemetry data frame format; then searching a telemetry data packet corresponding to the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to a preset telemetry data packet type identifier; and finally, extracting the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to the preset telemetry channel position and the data bit width of the locking state of the measurement and control transponder.
Preferably, when the telemetry analytic device communicates with the measurement and control baseband device through a local area network, a communication protocol follows a TCP/IP protocol;
the measurement and control baseband equipment is in a server mode, monitors a data request of a telemetry port, and the telemetry analytic equipment initiates a connection request to the telemetry port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment;
after the TCP/IP connection is established, a telemetry data request is sent to the measurement and control baseband equipment, and after the measurement and control baseband equipment receives the telemetry data request, when a telemetry signal is received and a telemetry data frame is demodulated, the telemetry data frame is continuously sent to the telemetry analysis equipment frame by frame.
Preferably, the measurement method of the capturing time measurement device is: in an initial state of remote control unlocking of the measurement and control transponder, measuring a time length from when the measurement and control baseband equipment starts to output a remote control signal to when the remote control transponder is remotely controlled to be locked, wherein the time length is equivalent to a time length from when the measurement and control transponder receives the remote control signal to when the remote control transponder is remotely controlled to be locked, and the time length is the capture time of the measurement and control transponder;
when measuring measurement and control transponder capture time, the capture time measurement device supports single measurement and automatic multiple measurement.
Preferably, the capturing time measurement device, when communicating with the measurement and control baseband device through the local area network, the communication protocol follows the TCP/IP protocol;
the measurement and control baseband equipment is in a server mode, monitors a data request of a remote control port, and the capturing time measurement equipment initiates a connection request to the remote control port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment;
after the TCP/IP connection is established, when the capturing time measuring equipment needs to control the measurement and control baseband equipment to start or stop the remote control signal output, a control request is sent to the measurement and control baseband equipment, after the control request is received by the measurement and control baseband equipment, the starting or stopping operation of the remote control signal output is carried out according to the type of the control request, and response information is returned to the capturing time measuring equipment.
Preferably, the capture time measurement device, when communicating with the telemetry resolution device over a local area network, the communication protocol follows the TCP/IP protocol;
the remote measuring analysis equipment is in a server mode, monitors a data request of a remote measuring port, and the capturing time measurement equipment initiates a connection request to the remote measuring port of the remote measuring analysis equipment in a client mode to establish TCP/IP connection with the remote measuring analysis equipment;
after the TCP/IP connection is established, a telemetry data request is sent to a telemetry analysis device, and after the telemetry analysis device receives the request, the telemetry data is continuously sent to a capture time measurement device when a telemetry data frame is received and the telemetry data of the locked state of the measurement and control transponder is analyzed and extracted from the telemetry data frame.
The application provides a spacecraft measurement and control transponder capture time index test method, which comprises the following steps:
step S1: the capture time measurement equipment, the telemetry analysis equipment and the measurement and control baseband equipment are interconnected through a local area network; the measurement and control baseband equipment, the up-converter and the uplink radio frequency link are interconnected through a radio frequency cable, and the uplink radio frequency link is connected with the spacecraft measurement and control transponder through the radio frequency cable to establish an uplink remote control signal transmission link; connecting a spacecraft measurement and control transponder with a downlink radio frequency link through a radio frequency cable, and interconnecting the downlink radio frequency link, a down-converter and measurement and control baseband equipment through the radio frequency cable to establish a downlink telemetry signal transmission link;
step S2: setting a preparation state before a spacecraft measurement and control transponder captures time index test: starting up each test device and setting working parameters; setting a measurement and control transponder locking state telemetry extraction parameter in telemetry analysis equipment, establishing TCP/IP connection between measurement and control baseband equipment and the telemetry analysis equipment, and establishing a telemetry data frame communication state; establishing TCP/IP connection between a telemetry analysis device and a capturing time measurement device, and establishing a telemetry data communication state of a measurement and control transponder in a locking state; establishing TCP/IP connection between the capturing time measurement equipment and the measurement and control baseband equipment, and establishing a control request data communication state;
step S3: the spacecraft and the measurement and control transponder thereof are powered on, the measurement and control baseband equipment outputs a remote control signal and receives a telemetry signal, and a communication state of an uplink remote control signal and a downlink telemetry signal is established between the spacecraft and the measurement and control transponder;
step S4: in the capture time measuring equipment, resetting the capture time measuring function, sending a remote control signal output stopping request to the measurement and control baseband equipment by the capture time measuring equipment, stopping outputting the remote control signal by the measurement and control baseband equipment, remotely measuring the remote control locking state of the measurement and control transponder to be out of lock, and resetting a timer;
step S5: in the capture time measuring equipment, selecting 'single measurement', starting a capture time measuring function, and starting to measure the capture time of the measurement and control transponder;
step S6: after the capture time measuring equipment receives and detects that the remote measurement data of the locking state of the measurement and control transponder is changed into the locking state, stopping the timer, and displaying a timing result, namely the capture time of the measurement and control transponder measured at the time;
step S7: if the measurement is not needed, the execution of the test flow is finished, and if the measurement is needed again, the steps S4 to S6 are repeated.
Preferably, in step S5, before the acquisition time measurement function is started, "multiple measurements" are selected, and the number of measurements N and the measurement time interval T are set, and then the acquisition time measurement function is started, the measurement result is an arithmetic average of the results of automatically performing N acquisition time measurements.
Compared with the prior art, the application has the following beneficial effects:
1. according to the spacecraft measurement and control transponder capture time index test system and the test method, measurement and control transponder capture time can be measured and test results can be generated in a mode that capture time measurement equipment automatically judges and reads the locking state of the measurement and control transponder and automatically counts.
2. Compared with the traditional method for measuring the capturing time of the measurement and control transponder by means of complicated operations such as manually operating remote control signal output, starting a stopwatch, observing and controlling the locked state of the transponder to telemetering, stopping the stopwatch and the like, the test system and the method are beneficial to simplifying manual operation, improving test efficiency, reducing time errors caused by manually judging and reading the telemetering state and timing, and improving measurement accuracy.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a block diagram of a spacecraft measurement and control transponder capture time index test system of the present application.
FIG. 2 is a flow chart of a method for testing a captured time index of a spacecraft measurement and control transponder according to the present application.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
As shown in fig. 1 and fig. 2, the system and the method for testing the capturing time index of the spacecraft measurement and control transponder provided by the application comprise the following steps:
uplink radio frequency link: the device comprises a radio frequency cable and a radio frequency signal power attenuation component, wherein the working frequency band of the radio frequency cable and the radio frequency signal power attenuation component is DC-10 GHz, the attenuation value of the radio frequency signal power attenuation component is adjustable, the attenuation change range is 0-121 dB, and the adjustable step is 1dB; the system is used for establishing an uplink remote control signal transmission link between the test equipment and the measured spacecraft measurement and control transponder, and carrying out power attenuation on the uplink remote control signal so that the uplink remote control signal power meets the receiving requirement of the spacecraft measurement and control transponder; the device is connected with the up-converter through a radio frequency cable and receives a radio frequency remote control signal output by the up-converter; the power-attenuated radio frequency remote control signal is sent to the spacecraft measurement and control transponder through the radio frequency cable;
downlink radio frequency link: the device comprises a radio frequency cable and a radio frequency signal power attenuation component, wherein the working frequency band of the radio frequency cable and the radio frequency signal power attenuation component is DC-10 GHz, the attenuation value of the radio frequency signal power attenuation component is adjustable, the attenuation change range is 0-121 dB, and the adjustable step is 1dB; the system is used for establishing a downlink telemetry signal transmission link between the test equipment and the measured spacecraft measurement and control transponder, and carrying out power attenuation on the downlink telemetry signal so that the power of the downlink telemetry signal meets the receiving requirement of the downstream test equipment; the method comprises the steps of connecting a radio frequency cable with a spacecraft measurement and control transponder, and receiving radio frequency telemetry signals sent by the spacecraft measurement and control transponder; the power-attenuated radio frequency telemetry signal is sent to the down converter through the radio frequency cable;
an up-converter: the device is used for up-converting the 70MHz uplink intermediate frequency remote control signal output by the measurement and control baseband equipment to a radio frequency signal of 2 GHz-2.4 GHz, and the central frequency of the radio frequency remote control signal is the receiving frequency of a spacecraft measurement and control transponder; the intermediate frequency remote control signal is connected with the measurement and control baseband equipment through a radio frequency cable and is output by the measurement and control baseband; the radio frequency remote control signal is connected with an uplink radio frequency link through a radio frequency cable, and the radio frequency remote control signal after the up-conversion treatment is sent to the uplink radio frequency link;
a down converter: the device is used for down-converting a downlink radio frequency telemetry signal of 2 GHz-2.4 GHz output by a spacecraft measurement and control transponder to a 70M Hz intermediate frequency signal and outputting the intermediate frequency telemetry signal to measurement and control baseband equipment; the radio frequency telemetry signal is connected with the downlink radio frequency link through a radio frequency cable and is received; the device is connected with measurement and control baseband equipment through a radio frequency cable, and outputs an intermediate frequency telemetry signal after down-conversion treatment to the measurement and control baseband equipment;
measurement and control baseband equipment: the remote control device is used for generating an uplink intermediate frequency remote control signal and receiving and demodulating a downlink intermediate frequency remote control signal; the up-converter is connected with the radio frequency cable and transmits the generated intermediate frequency remote control signal to the up-converter; the device is connected with the down converter through a radio frequency cable and receives an intermediate frequency telemetry signal output by the down converter; the method comprises the steps that a measurement and control local area network is connected with a telemetry analysis device, and a demodulated telemetry data frame is sent to the telemetry analysis device through the local area network; the method comprises the steps of connecting a measurement and control local area network with a capturing time measuring device, and receiving remote control request data sent by the capturing time measuring device;
telemetry resolution device: the method comprises the steps of receiving a telemetry data frame demodulated by a measurement and control baseband device, analyzing the telemetry data frame, extracting the locking state telemetry of a spacecraft measurement and control transponder from the telemetry data frame, and sending the telemetry data frame to a capturing time measuring device through a local area network; the method comprises the steps of connecting a measurement and control local area network with measurement and control baseband equipment, and receiving a spacecraft telemetry data frame sent by the measurement and control baseband equipment; the method comprises the steps of connecting a measurement and control local area network with a capture time measurement device, and remotely measuring and sending the extracted locking state of a spacecraft measurement and control transponder to the capture time measurement device;
capture time measurement device: the method is used for measuring the capturing time of the spacecraft measurement and control transponder; the method comprises the steps of connecting a local area network with measurement and control baseband equipment, and sending a remote control request to the measurement and control baseband equipment; and the remote control analysis device is connected with the remote control analysis device through a local area network, and receives the remote control of the locking state of the spacecraft measurement and control transponder.
The measurement and control baseband equipment supports remote control signal generation and telemetry signal demodulation of two measurement and control modes: a unified carrier measurement and control mode and a direct sequence spread spectrum measurement and control mode; and the two measurement and control modes are multiplexed in a time-sharing way.
The measurement and control baseband equipment supports a remote control mode, under the remote control mode, the measurement and control baseband equipment can receive a control request sent by the capture time measurement equipment through the measurement and control local area network, the control request type comprises two types of remote control signal output start and remote control signal output stop, and the measurement and control baseband equipment performs corresponding setting according to the control request type: when the type of the received control request is that the remote control signal output is started, starting to output the remote control signal, and if a Doppler frequency scanning state is to be applied to the remote control signal, presetting a number frequency scanning range and a frequency scanning rate; and stopping outputting the remote control signal when the received control request type is that the remote control signal output is stopped.
The telemetry analysis equipment extracts the telemetry of the locking state of the measurement and control transponder from the telemetry data frame, and the method comprises the following steps: presetting a telemetry data packet type identifier of a telemetry channel in a locked state of a measurement and control transponder, and setting the position and telemetry bit width of the telemetry channel in the locked state of the measurement and control transponder in a telemetry data packet data area of a corresponding type; after the telemetry analysis equipment receives the telemetry data frame, various independent telemetry data packets are extracted from the effective data area of the telemetry data frame according to the telemetry data packet format and the telemetry data frame format; then searching a telemetry data packet corresponding to the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to a preset telemetry data packet type identifier; and finally, extracting the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to the preset telemetry channel position and the data bit width of the locking state of the measurement and control transponder. When the telemetry analysis equipment analyzes a telemetry data frame and a telemetry data packet and extracts the locking state of the measurement and control transponder for remote control, the telemetry data frame format and the telemetry data packet format which can be adapted are in accordance with the national army standard spacecraft measurement and control and data management part 6: the format prescribed in packet telemetry.
When the telemetry analytic device communicates with the measurement and control baseband device through the local area network, the communication protocol follows the TCP/IP protocol; the measurement and control baseband equipment is in a server mode, monitors a data request of a telemetry port, and the telemetry analytic equipment initiates a connection request to the telemetry port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment; after the TCP/IP connection is established, a telemetry data request is sent to the measurement and control baseband equipment, and after the measurement and control baseband equipment receives the telemetry data request, when a telemetry signal is received and a telemetry data frame is demodulated, the telemetry data frame is continuously sent to the telemetry analysis equipment frame by frame.
The measurement method of the capture time measurement device comprises the following steps: and under the remote control unlocking state of the measurement and control transponder, measuring the time length from the beginning of outputting a remote control signal to the remote control locking state of the measurement and control transponder by the remote control baseband equipment to be remotely measured to become locked, wherein the time length is equivalent to the time length from the receiving of the remote control signal to the locking of the remote control signal by the measurement and control transponder, and the time length is the capturing time of the measurement and control transponder. When measuring measurement and control transponder capture time, the capture time measuring equipment supports both single measurement and automatic multiple measurement, wherein the single measurement method is as follows: firstly resetting a capture time measurement function in capture time measurement equipment, sending a remote control signal output stop request to measurement and control baseband equipment by the capture time measurement equipment, stopping the output of the remote control signal by the measurement and control baseband equipment, remotely measuring the remote control locking state of a measurement and control transponder to be out of lock, and resetting a timer; then selecting a single measurement function and starting a capturing time measurement function, wherein the capturing time measurement device sends a remote control signal output starting request to the measurement and control baseband device, so that the measurement and control baseband device starts outputting the remote control signal, simultaneously starts a timer, and continuously receives and detects whether the measurement and control transponder locking state telemetry received from the telemetry resolution device is changed from unlocking to locking; and stopping the timer after detecting that the remote measurement of the locking state of the measurement and control transponder is changed from unlocking to locking, and taking the capturing time of the measurement and control transponder as the timing value of the current timer. The automatic multiple measurement method comprises the following steps: firstly resetting the capture time measurement function, sending a remote control signal output stop request to the measurement and control baseband equipment by the capture time measurement equipment, stopping outputting the remote control signal by the measurement and control baseband equipment, remotely measuring the remote control locking state of the measurement and control transponder to be out of lock, and resetting a timer; then selecting a function of 'multiple measurement', setting measurement times N and a measurement time interval T, wherein the measurement time interval T is required to be larger than a downloading period of the remote measurement of the locking state of the measurement and control transponder, starting a capturing time measurement function after the setting is finished, and then sending a remote control signal output starting request to the measurement and control baseband equipment by the capturing time measurement equipment, so that the measurement and control baseband equipment starts to output the remote control signal, simultaneously starting a timer, and continuously receiving and detecting whether the remote measurement of the locking state of the measurement and control transponder received from the remote measurement analysis equipment is changed from unlocking to locking; when detecting that the remote measurement of the locking state of the measurement and control transponder is changed from unlocking to locking, stopping the timer, recording the timing value of the timer, and automatically resetting the capturing time measuring function; after waiting for the time T, automatically restarting the next capturing time measuring function; recording the timing value of the timer after each measurement is completed, and automatically resetting the capturing time measurement function until the N capturing time measurement functions are completed; after the measurement is finished, storing the N times of measurement results in a local hard disk in a text file format, calculating the arithmetic average value of the N times of timer measurement results, and displaying the arithmetic average value as a final measurement result of automatic multiple measurement of the capture time of the measurement and control transponder.
The capturing time measuring equipment is communicated with the measurement and control baseband equipment through a local area network, and a communication protocol conforms to a TCP/IP protocol; the measurement and control baseband equipment is in a server mode, monitors a data request of a remote control port, and the capturing time measurement equipment initiates a connection request to the remote control port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment; after the TCP/IP connection is established, when the capturing time measuring equipment needs to control the measurement and control baseband equipment to start or stop the remote control signal output, a control request is sent to the measurement and control baseband equipment, after the control request is received by the measurement and control baseband equipment, the starting or stopping operation of the remote control signal output is carried out according to the type of the control request, and response information is returned to the capturing time measuring equipment. When the capturing time measurement equipment communicates with the telemetry analysis equipment through a local area network, the communication protocol follows the TCP/IP protocol, the telemetry analysis equipment is in a server mode, the data request of a telemetry port is monitored, the capturing time measurement equipment initiates a connection request to the telemetry port of the telemetry analysis equipment in a client mode, and TCP/IP connection is established with the telemetry analysis equipment; after the TCP/IP connection is established, a telemetry data request is sent to a telemetry analysis device, and after the telemetry analysis device receives the request, the telemetry data is continuously sent to a capture time measurement device when a telemetry data frame is received and the telemetry data of the locked state of the measurement and control transponder is analyzed and extracted from the telemetry data frame.
As shown in fig. 2, the application also provides a method for testing the capturing time index of the spacecraft measurement and control transponder, which comprises the following steps:
s1, interconnecting capturing time measurement equipment, telemetry analysis equipment and measurement and control baseband equipment through a local area network; the measurement and control baseband equipment, the up-converter and the uplink radio frequency link are interconnected through a radio frequency cable, and the uplink radio frequency link is connected with the spacecraft measurement and control transponder through the radio frequency cable to establish an uplink remote control signal transmission link; connecting a spacecraft measurement and control transponder with a downlink radio frequency link through a radio frequency cable, and interconnecting the downlink radio frequency link, a down-converter and measurement and control baseband equipment through the radio frequency cable to establish a downlink telemetry signal transmission link;
s2, setting a preparation state before a spacecraft measurement and control transponder captures time index test: starting up each test device and setting working parameters, wherein the working parameters comprise an up-converter working frequency point, a down-converter working frequency point, a remote control signal generation parameter, a remote measurement signal demodulation parameter and the like of the measurement and control baseband device; setting telemetry extraction parameters of a locked state of the measurement and control transponder in telemetry analytic equipment, wherein the telemetry extraction parameters comprise a telemetry data packet type identifier of a telemetry channel of the locked state of the measurement and control transponder, and the position and telemetry bit width of the telemetry channel of the locked state of the measurement and control transponder in a telemetry data packet data area of a corresponding type; establishing TCP/IP connection between the measurement and control baseband equipment and the telemetry analysis equipment, and establishing a telemetry data frame communication state; establishing TCP/IP connection between a telemetry analysis device and a capturing time measurement device, and establishing a telemetry data communication state of a measurement and control transponder in a locking state; and establishing TCP/IP connection between the capturing time measurement equipment and the measurement and control baseband equipment, and establishing a control request data communication state.
And S3, powering up the spacecraft and the measurement and control transponder, outputting a remote control signal by the measurement and control baseband equipment, receiving a telemetry signal, and establishing a communication state of an uplink remote control signal and a downlink telemetry signal between the spacecraft and the measurement and control transponder.
S4, in the capturing time measuring equipment, resetting the capturing time measuring function, sending a remote control signal output stopping request to the measurement and control baseband equipment by the capturing time measuring equipment, stopping outputting the remote control signal by the measurement and control baseband equipment, remotely measuring the remote control locking state of the measurement and control transponder to be out of lock, and resetting a timer;
s5, selecting 'single measurement' in the capture time measurement equipment, starting a capture time measurement function, and starting to measure the capture time of the measurement and control transponder;
s6, stopping the timer after the capture time measuring equipment receives and detects that the remote measurement data of the locking state of the measurement and control transponder changes into the locking state, and displaying a timing result, namely the capture time of the measurement and control transponder measured at the time.
And S7, after the execution of the test flow is finished, if the measurement is needed again, repeating the steps S4 to S6.
The capturing time measuring method not only supports the execution of a single measuring process and the execution of a manual multiple measuring process, but also supports the automatic execution of multiple measuring processes, and the method for automatically executing the multiple measuring processes comprises the following steps: in step S5, before the acquisition time measurement function is started, "multiple measurements" are selected, and the number of measurements N and the measurement time interval T are set, and then the acquisition time measurement function is started, and the measurement result is an arithmetic average of the results of automatically performing N acquisition time measurements.
Those skilled in the art will appreciate that the application provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the application can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (8)
1. The spacecraft measurement and control transponder capture time index test system is characterized by comprising an uplink radio frequency link, a downlink radio frequency link, an up-converter, a down-converter, measurement and control baseband equipment, telemetry analysis equipment and capture time measurement equipment, wherein:
the uplink intermediate frequency remote control signal generated by the measurement and control baseband equipment is sent to an up-converter, and the up-converter converts the uplink intermediate frequency remote control signal and sends the uplink intermediate frequency remote control signal to an uplink radio frequency link; the uplink radio frequency link attenuates the power of the uplink remote control signal and sends the power to the spacecraft measurement and control transponder;
the downlink radio frequency link receives a downlink telemetry signal sent by the spacecraft measurement and control transponder, attenuates the downlink telemetry signal and sends the downlink telemetry signal to the down converter; the down converter down converts the attenuated down telemetry signal into a down intermediate frequency telemetry signal and outputs the down intermediate frequency telemetry signal to the measurement and control baseband equipment;
the telemetry analysis equipment receives the telemetry data frame demodulated by the measurement and control baseband equipment, analyzes the telemetry data frame, extracts the locking state telemetry of the spacecraft measurement and control transponder from the telemetry data frame, and sends the locking state telemetry to the capture time measurement equipment;
the capturing time measuring equipment is used for measuring capturing time of the spacecraft measurement and control transponder and sending a remote control request to the measurement and control baseband equipment;
the measurement and control baseband equipment can receive a control request sent by the capture time measurement equipment through the measurement and control local area network, wherein the control request type comprises a remote control signal output start and a remote control signal output stop, and the measurement and control baseband equipment performs corresponding setting according to the control request type:
when the type of the received control request is that the remote control signal output is started, starting to output the remote control signal, and if a Doppler frequency scanning state is to be applied to the remote control signal, presetting a number frequency scanning range and a frequency scanning rate;
when the received control request type is that the remote control signal output is stopped, stopping the remote control signal output;
the telemetry analysis equipment extracts the telemetry of the locking state of the measurement and control transponder from a telemetry data frame, and the method comprises the following steps:
presetting a telemetry data packet type identifier of a telemetry channel in a locked state of a measurement and control transponder, and setting the position and telemetry bit width of the telemetry channel in the locked state of the measurement and control transponder in a telemetry data packet data area of a corresponding type;
after the telemetry analysis equipment receives the telemetry data frame, various independent telemetry data packets are extracted from the effective data area of the telemetry data frame according to the telemetry data packet format and the telemetry data frame format; then searching a telemetry data packet corresponding to the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to a preset telemetry data packet type identifier; and finally, extracting the telemetry of the locking state of the measurement and control transponder from the telemetry data packet according to the preset telemetry channel position and the data bit width of the locking state of the measurement and control transponder.
2. The spacecraft measurement and control transponder capture time index test system of claim 1, wherein the measurement and control baseband device supports remote control signal generation and telemetry signal demodulation for two measurement and control modes: a unified carrier measurement and control mode and a direct sequence spread spectrum measurement and control mode; and the two measurement and control modes are multiplexed in a time-sharing way.
3. The spacecraft measurement and control transponder capture time index test system of claim 1, wherein,
when the telemetry analytic device communicates with the measurement and control baseband device through a local area network, a communication protocol follows a TCP/IP protocol;
the measurement and control baseband equipment is in a server mode, monitors a data request of a telemetry port, and the telemetry analytic equipment initiates a connection request to the telemetry port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment;
after the TCP/IP connection is established, a telemetry data request is sent to the measurement and control baseband equipment, and after the measurement and control baseband equipment receives the telemetry data request, when a telemetry signal is received and a telemetry data frame is demodulated, the telemetry data frame is continuously sent to the telemetry analysis equipment frame by frame.
4. The spacecraft measurement and control transponder capture time index test system of claim 1, wherein,
the measurement method of the capture time measurement device is as follows: in an initial state of remote control unlocking of the measurement and control transponder, measuring a time length from when the measurement and control baseband equipment starts to output a remote control signal to when the remote control transponder is remotely controlled to be locked, wherein the time length is equivalent to a time length from when the measurement and control transponder receives the remote control signal to when the remote control transponder is remotely controlled to be locked, and the time length is the capture time of the measurement and control transponder;
when measuring measurement and control transponder capture time, the capture time measurement device supports single measurement and automatic multiple measurement.
5. The spacecraft measurement and control transponder capture time index test system of claim 4, wherein the capture time measurement device, when communicating with the measurement and control baseband device over a local area network, the communication protocol follows the TCP/IP protocol;
the measurement and control baseband equipment is in a server mode, monitors a data request of a remote control port, and the capturing time measurement equipment initiates a connection request to the remote control port of the measurement and control baseband equipment in a client mode to establish TCP/IP connection with the measurement and control baseband equipment;
after the TCP/IP connection is established, when the capturing time measuring equipment needs to control the measurement and control baseband equipment to start or stop the remote control signal output, a control request is sent to the measurement and control baseband equipment, after the control request is received by the measurement and control baseband equipment, the starting or stopping operation of the remote control signal output is carried out according to the type of the control request, and response information is returned to the capturing time measuring equipment.
6. The spacecraft measurement and control transponder capture time index test system of claim 4, wherein,
the capture time measurement device is communicated with the telemetry analysis device through a local area network, and a communication protocol complies with a TCP/IP protocol;
the remote measuring analysis equipment is in a server mode, monitors a data request of a remote measuring port, and the capturing time measurement equipment initiates a connection request to the remote measuring port of the remote measuring analysis equipment in a client mode to establish TCP/IP connection with the remote measuring analysis equipment;
after the TCP/IP connection is established, a telemetry data request is sent to a telemetry analysis device, and after the telemetry analysis device receives the request, the telemetry data is continuously sent to a capture time measurement device when a telemetry data frame is received and the telemetry data of the locked state of the measurement and control transponder is analyzed and extracted from the telemetry data frame.
7. The method for testing the capture time index of the spacecraft measurement and control transponder is characterized by comprising the following steps of:
step S1: the capture time measurement equipment, the telemetry analysis equipment and the measurement and control baseband equipment are interconnected through a local area network; the measurement and control baseband equipment, the up-converter and the uplink radio frequency link are interconnected through a radio frequency cable, and the uplink radio frequency link is connected with the spacecraft measurement and control transponder through the radio frequency cable to establish an uplink remote control signal transmission link; connecting a spacecraft measurement and control transponder with a downlink radio frequency link through a radio frequency cable, and interconnecting the downlink radio frequency link, a down-converter and measurement and control baseband equipment through the radio frequency cable to establish a downlink telemetry signal transmission link;
step S2: setting a preparation state before a spacecraft measurement and control transponder captures time index test: starting up each test device and setting working parameters; setting a measurement and control transponder locking state telemetry extraction parameter in telemetry analysis equipment, establishing TCP/IP connection between measurement and control baseband equipment and the telemetry analysis equipment, and establishing a telemetry data frame communication state; establishing TCP/IP connection between a telemetry analysis device and a capturing time measurement device, and establishing a telemetry data communication state of a measurement and control transponder in a locking state; establishing TCP/IP connection between the capturing time measurement equipment and the measurement and control baseband equipment, and establishing a control request data communication state;
step S3: the spacecraft and the measurement and control transponder thereof are powered on, the measurement and control baseband equipment outputs a remote control signal and receives a telemetry signal, and a communication state of an uplink remote control signal and a downlink telemetry signal is established between the spacecraft and the measurement and control transponder;
step S4: in the capture time measuring equipment, resetting the capture time measuring function, sending a remote control signal output stopping request to the measurement and control baseband equipment by the capture time measuring equipment, stopping outputting the remote control signal by the measurement and control baseband equipment, remotely measuring the remote control locking state of the measurement and control transponder to be out of lock, and resetting a timer;
step S5: in the capture time measuring equipment, selecting 'single measurement', starting a capture time measuring function, and starting to measure the capture time of the measurement and control transponder;
step S6: after the capture time measuring equipment receives and detects that the remote measurement data of the locking state of the measurement and control transponder is changed into the locking state, stopping the timer, and displaying a timing result, namely the capture time of the measurement and control transponder measured at the time;
step S7: if the measurement is not needed, the execution of the test flow is finished, and if the measurement is needed again, the steps S4 to S6 are repeated.
8. The method according to claim 7, wherein in step S5, before starting the capturing time measuring function, "multiple measurements" are selected, the number of measurements N and the measuring time interval T are set, and then the capturing time measuring function is started, and the measurement result is an arithmetic average of the results of automatically executing the capturing time measuring N times.
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