CN106909071B - A kind of spacecraft synchronization accuracy test macro and method based on pulse per second (PPS) - Google Patents
A kind of spacecraft synchronization accuracy test macro and method based on pulse per second (PPS) Download PDFInfo
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- CN106909071B CN106909071B CN201710103772.1A CN201710103772A CN106909071B CN 106909071 B CN106909071 B CN 106909071B CN 201710103772 A CN201710103772 A CN 201710103772A CN 106909071 B CN106909071 B CN 106909071B
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
Abstract
A kind of spacecraft synchronization accuracy test macro and method based on pulse per second (PPS), system composition include: navigation neceiver emulator, navigation neceiver, spaceborne time management facility, pulse per second (PPS) using terminal, logic analyser, surface power supply power supply, terminal ground checkout equipment, navigation neceiver prosecutor equipment, test client computer.The control recurrent pulse of pulse per second (PPS) using terminal is compared with the hardware second pulse signal that navigation neceiver provides using logic analyser, obtains pulse per second (PPS) synchronization accuracy between terminal and navigation neceiver.System uses the telemetered signal of pulse per second (PPS) using terminal record, and the actual parameter value for capableing of quick obtaining control recurrent pulse can conveniently realize the calculating and test of pulse per second (PPS) synchronization accuracy by the output valve for the hardware pulse per second (PPS) that logic analyser is read.
Description
Technical field
The present invention relates to a kind of spacecraft synchronization accuracy test macro and method based on pulse per second (PPS), are particularly suitable for large size
The test of satellite system irrespective of size pulse per second (PPS) synchronization accuracy.
Background technique
Pulse per second (PPS) time management mode is a kind of mainstream technology for realizing that spacecraft chronometer time is synchronous, it is necessary first to be navigated
Receiver normally locks navigation signal, and exporting whole pulse per second (PPS) under the instruction control of whole star, (such as GPS navigation message and GPS time are tight
Lattice are corresponding) signal and the corresponding absolute time information of the signal.Amplification of the pulse signal Jing Guo time service and data storage cell
With trigger signal is used as after branch process, institute's time synchronizing on-board equipment in need is sent to by private cable.Absolutely
Temporal information then passes through bus and is sent to correlation time synchronizer.Related subsystem is using the second pulse signal received as total system
Time service starting point completes high-precision time service or synchronization.
By taking remote sensing satellite as an example, remote sensing satellite because having efficient and continuing the advantages such as detectivity, resource and mapping,
The fields such as environmental monitoring, agricultural water conservancy, which achieve, to be widely applied.As user is to satellite remote sensing date high time, high spatial point
The continuous improvement of resolution demand, Optical remote satellite and microwave remote sensing satellite propose time precision on star and synchronization accuracy
More stringent requirement.By taking SAR remote sensing satellite as an example, during the work of high-resolution beam bunching mode, in order to obtain abundant essence
The satellite of thin target information, high-speed motion will irradiate to small range the pre-stored specific imaging region of satellite always, this is just
It is required that the time compares moment stringent synchronization, the time mistake of slight difference on preset beam bunching mode working time starting point and star
Difference can cause very important imaging performance to decline.
A kind of entitled clock synchronization system based on GPS/BD bimodulus time service of Chinese patent CN201410623668.1 and
Method, the system include the GPS/BD dual mode receiver with antenna, the pulse per second (PPS) of the GPS/BD dual mode receiver with antenna
G1pps output end and pulse per second (PPS) B1pps output end are extracted with moment sequence to be connected with confirmation module, realizes pulse per second (PPS) and synchronizes,
But the acquisition methods of pulse per second (PPS) synchronization accuracy it are not related to.A kind of entitled GPS pairs of the inspection of Chinese patent CN201310734350.6
When accuracy systems and method, comprising: GPS receiver unit, system clock, control unit and processing unit, GPS receiver unit generate
Benchmark pulse per second (PPS) is simultaneously sent to processing unit and obtains GPS time and GPS system clock is sent to system clock, system clock
It receives GPS time and completes clock synchronization, control unit monitors when system clock millisecond position is greater than preset threshold and sends system pulse per second (PPS) extremely
Processing unit, processing unit is for generating benchmark pulse per second (PPS) rising edge and system pulse per second (PPS) rising edge, and calculating benchmark pulse per second (PPS)
The time difference of rising edge and system pulse per second (PPS) rising edge, by the calculating time difference it can be concluded that the precision of GPS clock synchronization, this method are
System calibration method is not related to test of the pulse per second (PPS) using terminal to the synchronization accuracy of pulse per second (PPS).Chinese patent
A kind of entitled satellite time synchronization system of CN201210390636.2, including time transmitting portion, time tranfer part and when
Between receiving portion.Wherein, time transmitting portion generates accurate UTC time, concurrently by receiving to GNSS navigation signal
Pulse per second (PPS) corresponding with UTC whole moment second out.When time tranfer part is by pulse per second (PPS) and UTC corresponding with pulse per second (PPS) whole second
It carves information and is transmitted to time receiving portion.Time receiving portion receives pulse per second (PPS) and UTC corresponding with pulse per second (PPS) whole moment second
Information is triggered by pulse per second (PPS), is counted by local clock, to obtain accurate current time.Using the invention
The satellite high-precision clock synchronization system of proposition can make each measuring device work of satellite on same time reference, when still
It is not related to the acquisition methods of the synchronization accuracy between measuring device and GNSS navigation signal.
Summary of the invention
Technology of the invention solves the problems, such as: having overcome the deficiencies of the prior art and provide a kind of space flight based on pulse per second (PPS)
Device synchronization accuracy test macro and method solve the test problem of pulse per second (PPS) synchronization accuracy for Space Vehicle System, realize navigation
The high precision measurement of the time synchronization of receiver and pulse per second (PPS) using terminal.
The technical solution of the invention is as follows:
A kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS), comprising: navigation neceiver emulator, navigation receive
Machine, spaceborne time management facility, pulse per second (PPS) using terminal, logic analyser, surface power supply power supply, terminal ground checkout equipment,
Navigation neceiver prosecutor equipment, test client computer；
Navigation neceiver emulator realizes the transmitting of navigation signal and propagates simulation, provides information source for navigation neceiver,
Navigation neceiver handles the signal of navigation neceiver emulator, obtains whole second timing code and hardware pulse per second (PPS)
Signal, whole second timing code are distributed to pulse per second (PPS) using terminal by spaceborne time management facility, and hardware second pulse signal is supplied to
Pulse per second (PPS) using terminal, the synchronization signal as pulse per second (PPS) using terminal；When pulse per second (PPS) using terminal receives the whole second simultaneously
Between code and the hardware second pulse signal, realize high-precision time service, generate control recurrent pulse and be simultaneously supplied to logic analyser,
The control recurrent pulse is compared logic analyser with the hardware second pulse signal that navigation neceiver provides, and completes space flight
The test of device synchronization accuracy；
Surface power supply power supply powers to navigation neceiver emulator, navigation neceiver, spaceborne time management facility；Terminal
Face test equipment, which is realized, detects the working condition of pulse per second (PPS) using terminal, and navigation neceiver prosecutor equipment, which is realized, receives navigation
The Function detection of machine, test client computer realize the control to spaceborne time management facility.
Spaceborne time management facility is house keeping computer or central processing unit.
The logic analyser carries out the hardware second pulse signal that the control recurrent pulse and navigation neceiver provide
It compares, specifically:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ receives the hard of transmission with navigation for first control recurrent pulse moment t1 that logic analyser receives
The difference of part pulse per second (PPS) moment t0；
μ is the microsecond position for first control recurrent pulse that logic analyser receives.
The pulse per second (PPS) using terminal is optical camera or SAR load.
The signal of the navigation neceiver emulator simulation GPS satellite, Beidou navigation satellite or Galileo navigation satellite.
A kind of spacecraft synchronization accuracy test method, steps are as follows:
(1) cable connection state in accuracy test system is checked, confirmation connection status is normal；
(2) by test client computer check telemetry format whether with it is consistent as defined in communication protocol；
(3) navigation neceiver emulator output power is adjusted, locks navigation neceiver normally, completes positioning；
(4) it waits 10 minutes, confirmation navigation neceiver is completed after adjusting whole second function, and accurate hardware pulse per second (PPS) letter is exported
Number；
(5) logic analyser compares the hardware second pulse signal that the control recurrent pulse is provided with navigation neceiver
It is right, complete the test of this spacecraft synchronization accuracy；
(6) step (5) are repeated, continuous statistics 10 times, assembly average is as final pulse per second (PPS) synchronization accuracy.
Step (5) logic analyser believes the hardware pulse per second (PPS) that the control recurrent pulse and navigation neceiver provide
It number is compared, specifically:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ receives the hard of transmission with navigation for first control recurrent pulse moment t1 that logic analyser receives
The difference of part pulse per second (PPS) moment t0, μ are the microsecond position for first control recurrent pulse that logic analyser receives.
Compared with the prior art, the invention has the advantages that:
Synchronization accuracy test macro uses the telemetered signal of pulse per second (PPS) using terminal record, being capable of quick obtaining control week
The actual parameter value of phase pulse realizes pulse per second (PPS) synchronization accuracy by the output valve for the hardware pulse per second (PPS) that logic analyser is read
Calculating and test, the system of building is simple and reliable, and synchronization accuracy test method is convenient and efficient.
Detailed description of the invention
Fig. 1 is to implement to scheme the present invention is based on the spacecraft synchronization accuracy test macro of pulse per second (PPS)；
Fig. 2 is spacecraft synchronization accuracy test method schematic diagram of the present invention；
Specific embodiment
A specific embodiment of the invention is further described in detail with reference to the accompanying drawing.
As shown in Figure 1, the spacecraft synchronization accuracy test macro proposed by the present invention based on pulse per second (PPS), comprising: navigation connects
Receipts machine emulator, navigation neceiver, spaceborne time management facility, pulse per second (PPS) using terminal, logic analyser, surface power supply electricity
Source, terminal ground checkout equipment, navigation neceiver prosecutor equipment, test client computer；
Navigation neceiver emulator realizes the transmitting of navigation signal and propagates simulation, provides information source for navigation neceiver,
Navigation neceiver handles the signal of navigation neceiver emulator, obtains whole second timing code and hardware pulse per second (PPS)
Signal, whole second timing code are distributed to pulse per second (PPS) using terminal by spaceborne time management facility, and hardware second pulse signal is supplied to
Pulse per second (PPS) using terminal, the synchronization signal as pulse per second (PPS) using terminal；When pulse per second (PPS) using terminal receives the whole second simultaneously
Between code and the hardware second pulse signal, realize high-precision time service, generate control recurrent pulse and be simultaneously supplied to logic analyser,
The control recurrent pulse is compared logic analyser with the hardware second pulse signal that navigation neceiver provides, and completes space flight
The test of device synchronization accuracy；
Surface power supply power supply powers to navigation neceiver emulator, navigation neceiver, spaceborne time management facility；Terminal
Face test equipment, which is realized, detects the working condition of pulse per second (PPS) using terminal, and navigation neceiver prosecutor equipment, which is realized, receives navigation
The Function detection of machine, test client computer realize the control to spaceborne time management facility.
Spaceborne time management facility is house keeping computer or central processing unit.
The logic analyser carries out the hardware second pulse signal that the control recurrent pulse and navigation neceiver provide
It compares, specifically:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ receives the hard of transmission with navigation for first control recurrent pulse moment t1 that logic analyser receives
The difference of part pulse per second (PPS) moment t0；
μ is the microsecond position for first control recurrent pulse that logic analyser receives.
The pulse per second (PPS) using terminal is optical camera or SAR load.Navigation neceiver emulator simulation GPS satellite,
The signal of Beidou navigation satellite or Galileo navigation satellite.
As shown in Fig. 2, the invention also provides a kind of based on the same of the spacecraft synchronization accuracy test macro realization
Method for testing precision is walked, steps are as follows:
(1) cable connection state in accuracy test system is checked, confirmation connection status is normal；
The purpose of inspection of the step is the especially cable in order to which the connection status to synchronization accuracy test macro confirms
The Correctness checking of connection, impedance matching inspection etc..
(2) by test client computer check telemetry format whether with it is consistent as defined in communication protocol；
The purpose of inspection of the step is to make test macro in the true of communication mode and information interaction approach and satellite
In-orbit state is consistent, it is ensured that the communication protocol used uses communication protocol identical with satellite, just can ensure that pulse per second (PPS) in this way
Timing code is identical as satellitosis on the transmit path.
(3) navigation neceiver emulator output power is adjusted, locks navigation neceiver normally, completes positioning；
The purpose that the step is implemented is to simulate navigation neceiver in order to ensure navigation neceiver is in normal operating conditions
The true in-orbit state that the signal of nautical star is received and locked.
(4) it waits 10 minutes, confirmation navigation neceiver is completed after adjusting whole second function, and accurate hardware pulse per second (PPS) letter is exported
Number；
The purpose that the step is implemented is in order to ensure the hardware pulse per second (PPS) of navigation reception output is effective.
(5) logic analyser compares the hardware second pulse signal that the control recurrent pulse is provided with navigation neceiver
It is right, complete the test of this spacecraft synchronization accuracy；
Specifically:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ receives the hard of transmission with navigation for first control recurrent pulse moment t1 that logic analyser receives
The difference of part pulse per second (PPS) moment t0, μ are the microsecond position for first control recurrent pulse that logic analyser receives；
(6) step (5) are repeated, continuous statistics 10 times, assembly average is as final pulse per second (PPS) synchronization accuracy.
The purpose that the step is implemented is to can more effectively illustrate test result using the method for assembly average
Confidence level proposes to influence caused by individual outlier.
Embodiment:
It is illustrated by taking the loading device of synthetic aperture radar SAR satellite as an example:
1, on star and ground installation cable connection state, self-test state confirmation.
2, confirm navigation neceiver star on and ground installation cable connection state, self-test state confirmation.
3, confirm that SAR supervision timer (pulse per second (PPS) using terminal) and ground installation cable connection state, self-test state are true
Recognize.
4, confirm that subsystem of participating in the experiment, interconnecting device, logic analyser are connected with each other state.
5, by test client computer check telemetry data format whether with it is consistent as defined in communication protocol.
6, navigation neceiver emulator output power is adjusted, locks receiver normally, completes positioning function.
7, it waits 10 minutes, after confirmation navigation neceiver completes adjustment second function, exports accurate hardware second pulse signal.
8, the time difference that first control recurrent pulse and pulse per second (PPS) moment are recorded and calculated using logic analyser, should
It controls the recurrent pulse time and the pulse per second (PPS) moment is from the direct-recording time value of logic analyser.
9, the microsecond position μ of μ=232.6 s of first control recurrent pulse is recorded by biography under telemetering.
10, SAR supervision timer processing pulse per second (PPS) link delay be first control recurrent pulse microsecond position μ=
232.6 μ s, the μ of difference τ=2.2 s with the μ of δ=230.4 s.
11, continuous statistics 10 times count delay data average value as final pulse per second (PPS) synchronization accuracy, and precision is
1.608μs。
12, each test equipment units shutdown.
Above-described embodiment uses test method proposed by the present invention, and quick obtaining SAR load controls the reality of recurrent pulse
Parameter value realizes the calculating of SAR load pulse per second (PPS) synchronization accuracy by the output valve for the hardware pulse per second (PPS) that logic analyser is read
Simple and reliable with the system of test, building, synchronization accuracy test method is convenient and efficient.
Unspecified part of the present invention belongs to common sense well known to those skilled in the art.
Claims (7)
1. a kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS), characterized by comprising: navigation neceiver emulator,
Navigation neceiver, spaceborne time management facility, pulse per second (PPS) using terminal, logic analyser, surface power supply power supply, terminal ground are surveyed
Try equipment, navigation neceiver prosecutor equipment, test client computer；
Navigation neceiver emulator realizes the transmitting of navigation signal and propagates simulation, provides information source for navigation neceiver,
Navigation neceiver handles the signal of navigation neceiver emulator, obtains whole second timing code and hardware pulse per second (PPS) letter
Number, whole second timing code is distributed to pulse per second (PPS) using terminal by spaceborne time management facility, and hardware second pulse signal is supplied to the second
Pulse using terminal, the synchronization signal as pulse per second (PPS) using terminal；Pulse per second (PPS) using terminal receives whole time second simultaneously
Code and the hardware second pulse signal realize high-precision time service, generate control recurrent pulse and are supplied to logic analyser, patrol
It collects analyzer the control recurrent pulse is compared with the hardware second pulse signal that navigation neceiver provides, completes spacecraft
The test of synchronization accuracy；
Surface power supply power supply powers to navigation neceiver emulator, navigation neceiver, spaceborne time management facility；Terminal ground is surveyed
It tries equipment realization to detect the working condition of pulse per second (PPS) using terminal, navigation neceiver prosecutor equipment is realized to navigation neceiver
Function detection, test client computer realize the control to spaceborne time management facility.
2. a kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS) according to claim 1, it is characterised in that: star
Carrying time management facility is house keeping computer or central processing unit.
3. a kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS) according to claim 1, it is characterised in that: institute
It states logic analyser and the control recurrent pulse is compared with the hardware second pulse signal that navigation neceiver provides, specifically
Are as follows:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ is first control recurrent pulse moment t1 that logic analyser receives and the hardware second that navigation reception is sent
The difference of pulse time t0；
μ is the microsecond position for first control recurrent pulse that logic analyser receives.
4. a kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS) according to claim 1, it is characterised in that: institute
Stating pulse per second (PPS) using terminal is optical camera or SAR load.
5. a kind of spacecraft synchronization accuracy test macro based on pulse per second (PPS) according to claim 1, it is characterised in that: institute
State the signal of navigation neceiver emulator simulation GPS satellite, Beidou navigation satellite or Galileo navigation satellite.
6. a kind of synchronization accuracy test method realized based on spacecraft synchronization accuracy test macro described in claim 1,
It is characterized in that steps are as follows:
(1) cable connection state in accuracy test system is checked, confirmation connection status is normal；
(2) by test client computer check telemetry format whether with it is consistent as defined in communication protocol；
(3) navigation neceiver emulator output power is adjusted, locks navigation neceiver normally, completes positioning；
(4) it waits 10 minutes, confirmation navigation neceiver is completed after adjusting whole second function, and accurate hardware second pulse signal is exported；
(5) the control recurrent pulse is compared logic analyser with the hardware second pulse signal that navigation neceiver provides,
Complete the test of this spacecraft synchronization accuracy；
(6) step (5) are repeated, continuous statistics 10 times, assembly average is as final pulse per second (PPS) synchronization accuracy.
7. a kind of synchronization accuracy test method according to claim 6, it is characterised in that: step (5) logic analysis
The control recurrent pulse is compared instrument with the hardware second pulse signal that navigation neceiver provides, specifically:
Pulse per second (PPS) synchronization accuracy τ are as follows: τ=μ-δ；
Wherein, δ is first control recurrent pulse moment t1 that logic analyser receives and the hardware second that navigation reception is sent
The difference of pulse time t0, μ are the microsecond position for first control recurrent pulse that logic analyser receives.
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| CN108844544B (en) * | 2018-06-11 | 2020-09-18 | 北京航天自动控制研究所 | Information synchronism design method for main and sub navigation devices |
| CN109001971B (en) * | 2018-07-25 | 2019-09-06 | 中国科学院国家空间科学中心 | A kind of certainly punctual system and method for the spaceborne interference imaging altimeter based on FPGA |
| CN109633700B (en) * | 2018-12-03 | 2022-11-22 | 天津津航计算技术研究所 | Method for testing time service precision of multiple GPS receivers |
| CN109714125B (en) * | 2019-01-08 | 2021-04-27 | 上海卫星工程研究所 | Method and system for synchronizing wireless time between satellite cabins and satellite |
| CN111756593B (en) * | 2019-03-28 | 2023-01-17 | 北京米文动力科技有限公司 | Self-testing method and testing method for synchronization precision of time synchronization system |
| CN111082917B (en) * | 2019-11-26 | 2022-04-12 | 北京空间机电研究所 | Accurate time keeping method of integration time based on pulse per second |
| CN112305575B (en) * | 2020-09-25 | 2024-04-02 | 北京空间飞行器总体设计部 | Precise orbit determination system for high orbit SAR satellite |
| CN112305568B (en) * | 2020-09-30 | 2023-08-29 | 北京空间飞行器总体设计部 | Method for testing consistency of ranging result and ranging reference change of spacecraft |
| CN113498625A (en) * | 2020-10-13 | 2021-10-12 | 深圳市大疆创新科技有限公司 | Clock synchronization method and device, chip system, unmanned aerial vehicle and terminal |
| CN112710945B (en) * | 2020-12-07 | 2022-09-27 | 航天恒星科技有限公司 | Universal timing test device and method |
| CN113824522B (en) * | 2021-09-18 | 2023-09-12 | 上海航天电子通讯设备研究所 | Timing system based on VDE star-ship synchronous communication system |
| CN116896516A (en) * | 2023-08-09 | 2023-10-17 | 上海怿星电子科技有限公司 | Time synchronization precision testing system and method based on pulse per second method |
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