CN104215859B - Satellite electronic load testing method - Google Patents
Satellite electronic load testing method Download PDFInfo
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- CN104215859B CN104215859B CN201410484607.1A CN201410484607A CN104215859B CN 104215859 B CN104215859 B CN 104215859B CN 201410484607 A CN201410484607 A CN 201410484607A CN 104215859 B CN104215859 B CN 104215859B
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Abstract
The invention provides a satellite electronic load testing method. The satellite electronic load testing method is characterized in that the remote metering of a satellite is a signal for synchronizing an electronic load ground testing device to the satellite by time according to the rule of downloading at intervals based on the fixed time, and the information of the time in the satellite is extracted, so as to provide the time standard for the ground testing device; the ground testing device with the LXI (LAN extension for instrumentation) function is adopted, and the software and the network are utilized for controlling and inquiring, so as to synchronize the state variations of the ground testing device and the device in the satellite; the state stetting of the ground testing device is inquired and recorded on real time, and therefore, an accurate testing input condition is provided for interpreting the electronic load data. According to the satellite electronic load testing method, the risk caused by manual operation and mis-operation is further reduced after the introduction of a list of test examples. The satellite electronic load testing method is applicable to the condition that the satellite electronic load working modes are frequently switched and the ground testing device is to be correspondingly adjusted, which leads to slow update speed of related remote metering information. With the adoption of the satellite electronic load testing method, the manual operation link is simplified, the testing efficiency is raised, and the project realization is convenient.
Description
Technical field
The present invention relates to a kind of electric load method of testing, particularly a kind of electric load test under the conditions of whole star
Method, belongs to technical field of measurement and test.
Background technology
After electric load is integrated being arranged on satellite, need under the conditions of whole star to the various functions of electric load, property
Can be tested.For the in-orbit real work situation of analog satellite, ground installation to coordinate electronics to carry by simulating actual signal
Lotus is tested.Electric load receives the analogue signal of ground installation generation by the way of wirelessly or non-wirelessly, according to mode of operation and
The analogue signal receiving is generated load data by state, and these data are reached ground application system through several descending.Pass through
Compare electric load produce data whether be consistent with the anticipatory data corresponding to analogue signal to judge electric load function,
Whether performance meets design requirement.
The at present integration testing to electric load under the conditions of whole star, is mainly completed by manually dominating.According to electronics
Load operation pattern and the telemetry intelligence (TELINT) of state, tester's setting ground equipment state produces corresponding analogue signal, then leads to
Cross the correctness of the electric load data judging that number descends biography to complete the various functions to electric load, performance test.
The method of testing of the electric load under the conditions of existing whole star, artificial participation is more, and automaticity is low, exists following
The problem of three aspects:
1st, the difficulty of ground installation accurate fit load test is big.The telemetry intelligence (TELINT) of electric load has retardance, remote measurement
The loaded-up condition of informational response lags behind the virtual condition change of electric load all the time, and it is right that artificial setting ground installation easily misses
The loaded-up condition answered, particularly particularly evident in the case that loaded-up condition switch speed is fast.
2nd, artificial setting ground installation is unfavorable for accurate interpretation load data.The state setting of ground installation is according to whole star
Test detailed rules and regulations carry out, and the state recording of ground installation is all manual record, and the poor accuracy of time is so that be difficult to ground
The state of face equipment is accurately mapped in time with the state of electric load on star, and the clock using on satellite and ground
There is deviation in clock used by face, the time deviation on testing time longer star and ground is bigger, and these all increase to charge number
Difficulty according to correct interpretation.
3rd, easily the unintended signal that mistake setting or maloperation cause in artificial setting ground installation, particularly on ground
It is easier that mistake occurs in the case of the equipment setting up procedure complexity of face.And this will make ground installation produce other unexpected moulds
Intend signal, the interpretation of interference load data.This is also to often result in the main cause verifying ground installation with on-board equipment.
These factors lead to the electric load testing efficiency of whole star condition low.Increasing satellite develop task and
Shorten under the background of lead time, the method for testing of this electric load will become restriction satellite development and production efficiency at present
One key factor.
Content of the invention
The technology solve problem of the present invention is: overcomes the deficiencies in the prior art, there is provided a kind of satellite electron load test
Method, decreases the link of manual intervention, is used as synchronizing signal by introducing satellite telemetry broadcast, increased to ground installation shape
In state and star, the associated record of time, is that the interpretation of electric load data provides accurate test equipment state, using test
Use-case list and automatically control ground installation, solves electric load ground checkout equipment and with state synchronized on star and accurately tests
Problem.
The technical solution of the present invention is: a kind of satellite electron load testing method, and step is as follows:
(1) demand according to satellite electron load test, writes the test case of each electric load with tabular form, test
Use-case includes analog signal parameter, power and execution duration, and described analog signal parameter includes frequency, pulse width and repetition
Cycle；
(2) according to time interval set in advance, earthward test network sends broadcast remote measurement to the tracking-telemetry and command subsystem on satellite
Data, ground testing system real time record broadcast telemetry simultaneously carries out system delay demarcation to ground testing system；Describedly
Face test system includes load test computer, load special test equipment, observing and controlling special test equipment and instruction computer, tool
Body is:
If carrying out system delay demarcation, load test computer according to surface instruction computer starting ground checkout equipment
By observing and controlling special test equipment receive broadcast telemetry and record in current broadcast telemetry star on the time, be designated as
t1, after postponing the n second, load test computer starting test program, remember that this moment is t2=t1+ n the second, after the completion of load test,
Instruct the moment of actual execution in interpretation load data, be designated as t1', after postponing the n second, in analysis load data, actually receive mould
Intend the moment of signal source, be designated as t2', the time delay of test system is designated as the x second, and time delay is by x=t1-t1' or x=t2-
t2' obtain；
If moment t on star3Start electric load on star and carry out system delay demarcation, then the tracking-telemetry and command subsystem on satellite is pressed
According to time interval set in advance, earthward test network sends broadcast telemetry, and it is special that load test computer passes through observing and controlling
Test equipment receives satellite and contains t3After the broadcast telemetry in moment, start ground checkout equipment, by the special survey of load
Examination equipment sends analogue signal to satellite, and the moment that electric load on star is received this analogue signal is designated as t3', then test system
Y time delay of system can pass through y=t3’-t3Calculate；Described n determines according to satellite electron load design, and guarantees this
When satellite electron load be in normal operating conditions；Described broadcast telemetry include during Satellite and each subsystem of satellite distant
Survey parameter；
(3) according to the system delay calibration result in step (2), terrestrial clock is modified, presses in ground testing system
In the case of starting test program according to instruction, if test system cannot predict the time that instruction starts, by receiving finger
The mode taking second execution time x reducing by the 1st test case after making enabling signal is modified；If according on the star setting
Time starts test program, then start test program by the time advance y second on the star than setting and revise, so that on star
Time and ground testing system time synchronized；
(4) test case in ground testing system read step (1), and by the analog signal parameter in test case and
Power sends load special test equipment to, and load special test equipment is according to the analog signal parameter in test case and power
Send analogue signal to the electric load of satellite, and this analog signal parameter and power are sent to load test computer note
Record, after the electric load of satellite receives the analogue signal of load special equipment transmission, is produced electric load data, is passed by number
Special test equipment is transferred to load test computer and is recorded, ground testing system real time record current load special test
The state of equipment, the state of described special test equipment includes the analogue signal of special test equipment transmission, analog signal parameter
And power；
(5) broadcast that ground testing system real-time reception observing and controlling special test equipment forwards while carrying out step (4)
Telemetry, records the duration of current test case execution, if less than or equal to execution duration set in advance in test case,
Continue executing with this test case, if more than execution duration set in advance in test case, order executes next test and uses
Example；
(6) repeat step (4)～step (5), until all test cases are performed both by completing；
(7) by the electric load data of LOAD FOR machine record in step (4) and the expectation corresponding to input analogue signal
Value is compared, and calculates the difference between electric load data and expected value；If this difference is less than or equal to threshold value set in advance,
Then this electric load meets the requirements, and otherwise this electric load is undesirable；
(8) repeat step (4)～step (7), until complete the test of all electric load on star.
Compared with the prior art, the invention has the advantages that:
(1) satellite telemetry is broadcasted the synchronizing signal as ground checkout equipment by the present invention, realizes on ground installation and star
Time reference is synchronous, to be ground installation with the electric load test of on-board equipment time synchronized provide time interface it is not necessary to
Specially design and install equipment on satellite to realize the time synchronized interface with ground installation, it is to avoid equipment is increased on star
The risk brought, also saves satellite development cost simultaneously；
(2) present invention utilizes the lxi interface of ground checkout equipment, ground installation is implemented control by software and network and
Status poll.Manually operated link when the stylized control of software decreases ground installation test, can quickly realize ground
The state switching of test equipment.In test, required test case is configured in the form of tabular in advance, it is to avoid manually real-time
The problem of setting, it also avoid mistake setting or the maloperation of ground installation.With existing manual record ground checkout equipment shape
State is compared, and the sequencing inquiry of software can record the change of ground installation state in real time and quickly, improves efficiency.
(3) present invention introduces remote measurement broadcast is as synchronizing signal, in conjunction with software control and inquiry ground checkout equipment so that
Ground installation state possesses the ability with the accurate synchronization switching in time of on-board equipment state；According to time accurate recording on star
Ground installation state, realizes associating of time and ground installation on star, is the accurate input bar of the interpretation of electric load data
Part.
(4) present invention possesses the function of starting or start according to instruction ground checkout equipment according to the time on star that sets,
Adapt to program control command startup and also adapt to manual test, extend the adaptability that ground checkout equipment is tested to whole star.
(5) present invention does not need to change satellite borne equipment it is not required that changing the equipment of ground testing system, method
Implement simple, be conducive to Project Realization.
Brief description
Fig. 1 is present device connection diagram；
Fig. 2 is the inventive method flow process；
The flow chart that Fig. 3 demarcates test system time delay for the present invention；
Fig. 4 is test flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is further described in detail.
The invention provides a kind of satellite electron load testing method.This method is in existing satellite test network foundation
Upper realization, detail is shown in " moonlet tracking-telemetry and command subsystem automatic test Software Design and Realization ", Mao Xinbai, and Nankai is big
Learn, soft project academic dissertation, 2012 and " moonlet measuring technology development with prospect ", Li Peihua etc., moonlet skill in 2011
Art exchanging meeting collection of thesis.
It is illustrated in figure 1 the equipment connection diagram of the present invention, as shown in Figure 1, have interface with satellite electron load test
The subsystem of relation includes tracking-telemetry and command subsystem, load subsystem, data transmission subsystem.Connected by high frequency cable therewith or wirelessly connect
The ground checkout equipment connecing is observing and controlling scoe (specific checkout equipent, special test equipment), load scoe
(mostly simulation signal generator, for producing analogue signal) sum passes scoe.Observing and controlling scoe, load scoe, number pass scoe, instruction meter
Calculation machine, load test computer and test network are attached by netting twine.
Tracking-telemetry and command subsystem is mainly responsible for receiving the radio frequency command signal that observing and controlling scoe forwards, and the radio frequency telemetry on star is believed
Number send to observing and controlling scoe.Observing and controlling scoe major function is that 1. command informations sending instruction computer are converted to radiofrequency signal
It is sent to tracking-telemetry and command subsystem, and the command information that broadcast reception is arrived in test network；2. by containing of sending from tracking-telemetry and command subsystem
The radiofrequency signal having telemetry intelligence (TELINT) is converted to digital broadcasting information, and broadcasts in test network.
Load scoe, can using the equipment possessing lxi (lan extensions for instrumentation) function
To be arranged by the parameter of network and its analogue signal of programme-control, power etc..Load scoe mainly 1. is surveyed according to from load
The control instruction of examination computer exports corresponding analogue signal, 2. replys the status poll from load test computer.Load
Subsystem receives the signal from load scoe (generally simulation signal generator), and the electricity that will generate by wirelessly or non-wirelessly mode
Sub- load data is transferred to data transmission subsystem.Electric load data is transmitted through radio-frequency channel by data transmission subsystem and is passed scoe to number.
Number passes scoe and mainly the radiofrequency signal containing load data information that data transmission subsystem passes down is converted into electric load data letter
Breath, and it is transferred to load test computer.
By instructing computer, network is sent to observing and controlling scoe after tested for the instruction of ground testing system, then is forwarded to satellite survey
Control subsystem.Remote measurement computer receives telemetry intelligence (TELINT) and command information broadcast by test network, and tester can pass through distant
Survey the telemetry intelligence (TELINT) that satellite checked by computer.
Load test computer receives telemetry intelligence (TELINT) and command information broadcast by test network, passes through network control simultaneously
Make, inquire about and record the state of load scoe (simulation signal generator), interpretation passes, from number, the satellite electron load data that scoe transmits.
The remote measurement of satellite is in strict accordance with the time on star according to fixed format, using fixing frequency in the form of packet
Passed down, so satellite telemetry can be used as the time reference of ground checkout equipment.General in the telemetry data packet of satellite
All comprise the telemetry intelligence (TELINT) of time and each subsystem of satellite on the star of satellite.Observing and controlling scoe forwards remote measurement broadcasting frequency and satellite
The time interval that telemetry data packet passes down is consistent.Therefore, in test network, the telemetry data packet that observing and controlling scoe forwards can
Using the clock sync signal as ground testing system, reduce the clock of ground testing system and the deviation of clock on star.Ground
The synchronization accuracy of time on face test equipment and Satellite, depending on the frequency that passes down of telemetry data packet of satellite.General satellite
Passing frequency under telemetry data packet is 4 bags/second, and its synchronization accuracy can reach 0.25 second.If necessary to improve precision further, can
Constantly to be divided to it with local computer between adjacent telemetry data packet twice, generally computer is permissible
Reach a millisecond magnitude moment division.In view of the clock accuracy of computer, synchronization accuracy is further increased to hundred milliseconds of magnitudes.
All comprise temporal information on star in each telemetry data packet, be ground testing system extract star on the time provide just
Profit.Therefore, time and the on-board equipment state on satellite is determined by temporal information on the star in extraction telemetry data packet, and
And load test computer can start the state with toggle ground plane test equipment accordingly, reduce artificial link.Ground sends
While instruction is sent to Satellite TT subsystem through observing and controlling scoe, command information also can be broadcasted in test network and only be broadcasted
Once, can be used as the signal of load test computer starting test program using this.The content of broadcast includes order code, as load
Lotus calculation machine distinguishes that whether instruction is the foundation of load enabled instruction.
It is to have delay that load test computer broadcasts the actual time on time and star on parsed star by remote measurement
's.Delay factor has the delay coming from observing and controlling scoe to instruction between tracking-telemetry and command subsystem and telemetry intelligence (TELINT) conversion, observing and controlling scoe
Instruction with test network and the delay of telemetry intelligence (TELINT) broadcast, LOAD FOR machine is receiving test program enabling signal until carrying
Lotus scoe exports the delay of analogue signal, and satellite reception arrives delay of the actual execute instruction of electric load etc. to after instruction.
So, before testing these delay factors to be modified so that time accurate synchronization on ground checkout equipment and star, and this
Complete in load test computer a bit.
Load test computer is the control axis completing load test, major function: 1. receive and parse through self-test
The Telemetry And Command broadcast of network, 2. controls, inquires about the state of simulation signal generator, 3. according to time record simulation signal generator on star
State, 4. starts ground checkout equipment according to time on the star setting or related satellite instruction, 5. observing and controlling front end system introduces
Time delay is modified, and 6. loads test case.Load test computer broadcasts as synchronised clock with remote measurement, using this clock as control
System and the time reference of inquiry simulation signal generator；Parsing remote measurement broadcast and revise temporal information on star as synchronised clock when
Carve, the state recording of simulation signal generator is recorded according to the clock time revising test system delay.
The flow chart being illustrated in figure 2 the present invention, as shown in Figure 2, a kind of satellite electron load test that the present invention provides
Method, specifically comprises the following steps that
(1) demand according to satellite electron load test, writes the test case of each electric load with tabular form, is surveying
Analog signal parameter, power and execution duration is write exactly, described analog signal parameter includes signal frequency, pulse width in example on probation
Degree, repetition period and power；
(2) according to time interval set in advance, earthward test network sends broadcast remote measurement to the tracking-telemetry and command subsystem on satellite
Data, ground testing system real time record broadcast telemetry simultaneously carries out system delay demarcation to ground testing system；Describedly
Face test system includes load test computer, load special test equipment, observing and controlling special test equipment and instruction computer, mark
The flow chart of the time delay of location survey test system is shown in Fig. 3, particularly as follows:
If carrying out system delay demarcation, load test computer according to surface instruction computer starting ground checkout equipment
By observing and controlling special test equipment receive broadcast telemetry and record in current broadcast telemetry star on the time, be designated as
t1, after postponing the n second, load test computer starting test program, remember that this moment is t2=t1+ n the second, when secondary load test is complete
Cheng Hou, instructs the moment of actual execution, is designated as t in interpretation load data1', after postponing the n second, actual in analysis load data
Receive the moment of simulation signal generator, be designated as t2', the instruction start delay time of test system is designated as the x second, and instructs start delay
Time is by x=t1’-t1Or x=t2’-t2Obtain；
If moment t on star3Start electric load on star and carry out system delay demarcation, then the tracking-telemetry and command subsystem on satellite is pressed
According to time interval set in advance, earthward test network sends broadcast telemetry, and it is special that load test computer passes through observing and controlling
Test equipment receives satellite and contains t3After the broadcast telemetry in moment, start ground checkout equipment, by the special survey of load
Examination equipment sends analogue signal to satellite, and the moment that electric load on star is received this analogue signal is designated as t3', then test system
Y time delay of system can pass through y=t3’-t3Calculate；Described n determines according to satellite electron load design, to guarantee this
When satellite electron load be in normal operating conditions；Described broadcast telemetry include during Satellite and each subsystem of satellite distant
Survey parameter；
(3) according to the system delay calibration result in step (2), terrestrial clock is modified, presses in ground testing system
In the case of starting test program according to instruction, test system cannot predict the time that instruction starts, then need receiving instruction
The mode taking second execution time x reducing by the 1st test case after enabling signal is modified；According to the time on the star setting
Start test program, then can start test program and to revise than the time advance y second on the star setting, so that the time on star
With ground testing system time synchronized；
(4) test case in ground testing system read step (1), and by the analog signal parameter in test case and
Power sends load special test equipment to, and load special test equipment is according to the analog signal parameter in test case and power
Send analogue signal to the electric load of satellite, and this analog signal parameter and power are sent to load test computer note
Record, after the electric load of satellite receives the analogue signal of load special equipment transmission, is produced electric load data, is passed by number
Special test equipment is transferred to load test computer and is recorded, ground testing system real time record current load special test
The state of equipment, the state of described load special test equipment includes the parameter of the analogue signal of load special test equipment transmission
And power；
(5) broadcast that ground testing system real-time reception observing and controlling special test equipment forwards while carrying out step (4)
Telemetry, records the duration of current test case execution, if less than or equal to execution duration set in advance in test case,
Continue executing with this test case, if more than execution duration set in advance in test case, order executes next test and uses
Example；
(6) repeat step (4)～step (5), until all test cases are performed both by completing；Specific test flow chart is such as
Shown in Fig. 4；
(7) by the electric load data of LOAD FOR machine record in step (4) and the expectation corresponding to input analogue signal
Value is compared, and calculates the difference between electric load data and expected value；If this difference is less than or equal to threshold value set in advance,
Then this electric load meets the requirements, and otherwise this electric load is undesirable；
(8) repeat step (4)～step (7), until complete the test of all electric load on star.
It is embodied as example
Taking certain type satellite electron load as a example, on this star, electric load is receiver device, mainly receives ground different
The signal of frequency range, and generate corresponding electric load data.The remote measurement broadcasting frequency of satellite is 4 times/second, ground checkout equipment with
On star, the synchronization accuracy of time can reach 0.25 second.
Require according to according to test event, 1. start satellite electron load test according to instruction, mode of operation is according to every 10
Second sequential loop switching between 3 radio frequency bands, test case is 3, the frequency measurement error of test electric load；2. according to star
The upper time starts satellite electron load test, and mode of operation executed successively and circulated according to 5 seconds, 15 seconds respectively for frequency range 4,5 and cuts
Change, test case is 2, pulse width measure error.The mode of operation of electric load is shown in Table 1, to two kinds of work of electric load in table 1
The working frequency range of pattern and each frequency range execution time are specified.
Table 1
Concrete testing procedure is as follows:
(1) it is directed to the test request of two kinds of mode of operations in table 1, write test case.Particular content is shown in Table 2, table 3.?
According to the regulation of test case in table 2, table 3, analogue signal is specified, including frequency, pulse width, the repetition cycle,
Power, and execute the time of this use-case.
Table 2
Table 3
(2) carry out test system time delay demarcation according to the mode of Fig. 3.Respectively test is started to the time on instruction startup and star
Program carries out system delay demarcation:
In the case of starting according to instruction, LOAD FOR machine is recorded when have received command broadcast, and now remote measurement is broadcasted
In star on the time, be designated as t1=1022 seconds.After postponing 5 seconds, load test computer starting test program, record this moment
For t2=1027 seconds.After the completion of time load test, pass scoe from number and obtain load data, instruct in interpretation load data
The time of actual execution, it is designated as t1'=1021 second.After postponing 5 seconds, when actually receiving simulation signal generator output in load data
The time carved, it is designated as t2'=1026 second.The time that computations postpones is t2-t2'=1 second.Therefore the instruction delay of test system
Time is designated as 1 second.
In the case of starting test program according to the time on star set in advance, on the star of setting, electric load starts and is
Time t3=2034 seconds, when LOAD FOR machine have received containing the remote measurement broadcast of time on the star setting, this moment was designated as t3
=2034 seconds.After this load test terminates, receive the time of analogue signal in interpretation electric load data, be designated as t3'=
2035 seconds.Under Program Mode, the time delay of test system calculates t3’-t3=1 second.Therefore according to the time on star set in advance
The time delay starting test system is 1 second.
(3) according to Fig. 4 mode, start electric load test according to instruction.In load test computer read step (1)
After test case, in the case of starting according to instruction, according to test system time delay being 1 second, then calculate in load test
After machine receives enabling signal, start test program immediately and execute the 1st test case in table 2, and by test case
Execution duration was changed to 9 seconds by 10 seconds, then recovered to execute the duration of 10 seconds when loop test again is to the 1st use-case, until surveying
Examination finishes.
Meanwhile, load test computer completes the parameter of the analogue signal of load scoe, power trace.It is specifically shown in
Table 4.In table 4, according to once per second, the parameter of the analogue signal to load scoe and power are recorded.Due in instruction
Startup time, the test system time is compared with 1 second evening of time on star, therefore on star during 3121 seconds time, load scoe does not export simulation
Signal, its record result is 0.
Table 4
(4) read electric load data and compare with the expected value corresponding to the analogue signal of input in table 4, calculate
Difference between electric load data and expected value, test frequency error requirements are qualified within 5mhz.Test result is shown in Table 5,
This electric load test result meets the requirements.
Table 5
(5) according to Fig. 4 mode, electric load test, the test case shown in load table 3 are started according to instruction.According to
In the case that the time on star that presets starts, setting starting time is 4000 seconds time on star, and test system is realized needs and carried
Start test program within first 1 second, therefore when load test computer receives the remote measurement broadcast data being 3999 seconds containing the time on star
Bao Shi, that is, start test program, and execute the 1st test case in table 3, and the execution duration switch test according to test case is used
Example, until be completed.
Meanwhile, load test computer completes the parameter of the analogue signal of load scoe, power trace.It is specifically shown in
Table 6.In table 6, recorded according to the parameter of the analogue signal to load scoe for the once per second, power.Because ground is surveyed
The test system time started on time according to the time on the star setting, therefore on star during 4000 seconds time, load scoe is accurate on request
Output analogue signal.
Table 6
(6) read electric load data and compare with the expected value corresponding to the analogue signal of input in table 6, calculate
Difference between electric load data and expected value.Pulsewidth test error requires within 1us, then electric load test conforms to
Ask.Test result is shown in Table 7, and this electric load test result meets the requirements.
Table 7
(7) test equipment power-off, electric load test completes.
The present invention is especially suitable for the switching of electric load equipment mode of operation is frequently it is desirable to ground checkout equipment is with electricity on star
Sub- load operation pattern carries out relative set, and the telemetry intelligence (TELINT) of electric load mode of operation updates slow and to there is remote measurement delayed
Situation.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (1)
1. a kind of satellite electron load testing method is it is characterised in that step is as follows:
(1) demand according to satellite electron load test, writes the test case of each electric load, test case with tabular form
Include analog signal parameter, power and execution duration, described analog signal parameter includes frequency, pulse width and repetition week
Phase；
(2) according to time interval set in advance, earthward test network sends broadcast remote measurement number to the tracking-telemetry and command subsystem on satellite
According to ground testing system real time record broadcast telemetry simultaneously carries out system delay demarcation to ground testing system；Described ground
Test system includes load test computer, load special test equipment, observing and controlling special test equipment and instruction computer, specifically
For:
If carrying out system delay demarcation according to surface instruction computer starting ground checkout equipment, load test computer passes through
Observing and controlling special test equipment receive broadcast telemetry and record in current broadcast telemetry star on the time, be designated as t1,
After postponing the n second, load test computer starting test program, remember that this moment is t2=t1+ n the second, after the completion of load test, interpretation
Instruct the moment of actual execution in load data, be designated as t1', after postponing the n second, in analysis load data, actually receive simulation letter
In the moment in number source, it is designated as t2', the time delay of test system is designated as the x second, and time delay is by x=t1-t1' or x=t2-t2' obtain
?；Described n determines according to satellite electron load design, and guarantees that now satellite electron load is in normal operating conditions；Described
Broadcast telemetry include during Satellite and each subsystem of satellite telemetry parameter；
If moment t on star3Start electric load on star and carry out system delay demarcation, then the tracking-telemetry and command subsystem on satellite is according to pre-
Earthward test network sends broadcast telemetry to the time interval first setting, and load test computer passes through observing and controlling special test
Equipment receives satellite and contains t3After the broadcast telemetry in moment, start ground checkout equipment, set by load special test
Send analogue signal for satellite, the moment that electric load on star is received this analogue signal is designated as t3', then test system
Time delay, y can pass through y=t3’-t3Calculate；
(3) according to the system delay calibration result in step (2), terrestrial clock is modified, in ground testing system according to finger
In the case that order starts test program, if test system cannot predict the time that instruction starts, by opening receiving instruction
The mode taking second execution time x reducing by the 1st test case after dynamic signal is modified；If according to the time on the star setting
Start test program, then test program is started by the time advance y second on the star than setting and revise, so that the time on star
With ground testing system time synchronized；
(4) test case in ground testing system read step (1), and by the analog signal parameter in test case and power
Send load special test equipment to, load special test equipment sends according to the analog signal parameter in test case and power
Analogue signal, to the electric load of satellite, and this analog signal parameter and power is sent to load test computer recording, defends
After the electric load of star receives the analogue signal of load special equipment transmission, produce electric load data, passed by number special
Test equipment is transferred to load test computer and is recorded, ground testing system real time record current load special test equipment
State, the state of described special test equipment includes analogue signal, analog signal parameter and the work(of special test equipment transmission
Rate；
(5) the broadcast remote measurement that ground testing system real-time reception observing and controlling special test equipment forwards while carrying out step (4)
Data, records the duration of current test case execution, if less than or equal to execution duration set in advance in test case, continuing
Execute this test case, if more than execution duration set in advance in test case, order executes next test case；
(6) repeat step (4)～step (5), until all test cases are performed both by completing；
(7) by the electric load data of load test computer recording in step (4) and the expectation corresponding to input analogue signal
Value is compared, and calculates the difference between electric load data and expected value；If this difference is less than or equal to threshold value set in advance,
Then this electric load meets the requirements, and otherwise this electric load is undesirable；
(8) repeat step (4)～step (7), until complete the test of all electric load on star.
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