CN102798869A - Method for testing constellation electronic load time difference measuring performance - Google Patents
Method for testing constellation electronic load time difference measuring performance Download PDFInfo
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- CN102798869A CN102798869A CN2012102524093A CN201210252409A CN102798869A CN 102798869 A CN102798869 A CN 102798869A CN 2012102524093 A CN2012102524093 A CN 2012102524093A CN 201210252409 A CN201210252409 A CN 201210252409A CN 102798869 A CN102798869 A CN 102798869A
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Abstract
The invention discloses a method for testing constellation electronic load time difference measuring performance. The method adopts a signal source with a pulse modulation function, a power splitter and an adjustable attenuator as a testing system, wherein the use of the power splitter increases the number of tested objects, and the application of the attenuator enables the testing system to test the time difference performance of an electronic load on each satellite under the conditions of different power so as to realize the separate control of pulse signal strength of each satellite, and expand the coverage of testing signals; and by adopting wired testing, the electromagnetic interference of an external environment is avoided, and the pairing (finding out the arrival time of the same pulse signal from the load data of each satellite) efficiency of the constellation electronic load pulse signals is improved.
Description
Technical field
The present invention relates to a kind of method of testing constellation electronics load time difference measurement performance, particularly a kind of method of testing of utilizing pulsed test signal to carry out constellation electronics load time difference measurement performance belongs to technical field of measurement and test.
Background technology
Time difference position application makes the time difference measurement performance become the main performance of constellation electronics load in satellite.For the time difference performance of guaranteeing the preceding constellation electronics load in satellites transmits Heaven meets the demands, must accomplish time difference performance test on ground to constellation electronics load.Still do not have this technology that is applied to satellite ground test at home, and for adopting real goal to test more, as utilize aircraft to carry signal source and emitting antenna and arrive in tested time difference positioning system by plane and test in the time difference of Ground Application positioning system.
Existing technical conditions mainly adopts wireless test, transfers signals to emitting antenna by signal source, and signal reaches each satellite of constellation through spatial transmission through emitting antenna.Under the situation of constellation (associated working of many stars); Adopt wireless test that constellation electronics load is carried out time difference measurement, then have following restraining factors: the external interference signal is many during (1) ground test, has increased the difficulty that pulse signals is matched; Even can't match, reduced testing efficiency; (2) if in microwave dark room, adopt wireless test, because multi-satellite is tested simultaneously, then need bigger darkroom, this puts the less of domestic existing darkroom ability guaranteed conditions.(3) since the relative position of emitting antenna and each satellite definite after, the pulse signal intensity of every star can only be increased or reduce simultaneously, can not control separately.
Summary of the invention
Technology of the present invention is dealt with problems and is: the electromagnetic interference problem that has overcome terrestrial test environment; A kind of method of testing constellation electronics load time difference measurement performance is provided; Realized independent control to the pulse signal intensity of every star; Strengthen the coverage of test signal, improved testing efficiency.
Technical solution of the present invention is: a kind of method of testing constellation electronics load time difference measurement performance, and step is following:
(1) test port S is connected with the input end of the first one-to-two power splitter; The output terminal of the first one-to-two power splitter connects the input end of the second one-to-two power splitter and the 3rd one-to-two power splitter respectively; The output terminal of the second one-to-two power splitter and the 3rd one-to-two power splitter is connected an adjustable attenuator respectively, and the output terminal note of four adjustable attenuators is made port A, B, C, D;
(2) utilize vector network analyzer to measure test port S and divide Insertion Loss and the time delay be clipped to port A, B, C, D, four road Insertion Loss are remembered respectively and are made L
A, L
B, L
C, L
D, four tunnel time delays are remembered respectively and are made τ
A, τ
B, τ
C, τ
D
(3) signal source is connected with test port S, four port A, B, C, D connect a satellite electron load respectively;
(4) signal source is set to the pulsed modulation state, exports a series of periodic pulse signals;
(5) damping capacity of adjustment signal source output power and four adjustable attenuators equates the power of the periodic pulse signal that four satellite electron load receive;
(6) periodic pulse signal that four satellite electron load is received is resolved, and obtains four satellite electron load and detects the receipts time that a series of periodic pulse signal arrived, and note is made t respectively
Ai, t
Bi, t
Ci, t
Di, the periodic pulse signal sequence number received for satellite electron load of i wherein;
(7) according to formula t '
Xi=t
Xi-τ
XFour satellite electron load are detectd the receipts time that a series of periodic pulse signal arrived carry out time delay elimination processing, X=A, B, C, D;
(8) the series of periods pulse signal that four satellite electron load after the elimination time delay is received matches according to periodic pulse signal time of arrival; Matching method is: be benchmark the series of periods pulse signal time of arrival that receives with satellite electron load A wherein; The series of periods pulse signal that its excess-three satellite electron load is received compares with benchmark respectively time of arrival; Be the periodic pulse signal of successful matching less than the periodic pulse signal of 3 times of time difference precision wherein with the time difference of benchmark; The periodic pulse signal of successful matching is thought the same periodic pulse signal from signal source output; Write down four satellite electron load and receive the also periodic pulse signal of successful matching, periodic pulse signal sequence time of arrival of successful matching is designated as T
Ai, T
Bi, T
Ci, T
Di, i=1 ... N, n are the periodic pulse signal number of successful matching;
(9) periodic pulse signal sequence time of arrival of utilizing satellite electron load A to receive also successful matching receives with all the other satellite electron load respectively and periodic pulse signal sequence time of arrival of successful matching is subtracted each other, and obtains periodic pulse signal time difference T
AXi=T
Ai-T
Xi, X=B, C, D;
(10) according to formula
Time difference measurement performance to constellation electronics load is estimated, as mean square deviation δ
AXThen the time difference measurement performance of constellation electronics load is qualified during precision index to be not more than the time difference, otherwise is defective.
The present invention's advantage compared with prior art is: the present invention adopts signal source, power splitter and the adjustable attenuator that possesses the pulsed modulation function; The use of power splitter has increased the quantity of measurand; The utilization of attenuator; Make test macro can test the time difference performance of electronics load under the different capacity situation on each satellite of constellation, realized independent control, strengthened the coverage of test signal the pulse signal intensity of every star; Adopt wired test, avoid the electromagnetic interference (EMI) of external environment, improved pairing (from the load data of each star, finding out the time of arrival of the same pulse signal) efficient of constellation electronics load pulse signal.Simultaneously, the present invention has reduced the requirement to the test site condition, is easy to Project Realization, can increase work efficiency.
Description of drawings
Fig. 1 is the composition structural representation of test macro of the present invention;
Fig. 2 is a test macro and the synoptic diagram that is connected of constellation electronics load;
Fig. 3 is periodic pulse signal pairing synoptic diagram.
Embodiment
The invention provides a kind of constellation electronics load time difference performance on-ground method of testing based on wired test.This method adopts signal source, power splitter, the adjustable attenuator that possesses the pulsed modulation function; Adopt the mode of Fig. 1 to test; Test port S is connected with the input end of the first one-to-two power splitter; The output terminal of the first one-to-two power splitter connects the input end of the second one-to-two power splitter and the 3rd one-to-two power splitter respectively; The output terminal of the second one-to-two power splitter and the 3rd one-to-two power splitter is connected an adjustable attenuator respectively, and the output terminal note of four adjustable attenuators is made port A, B, C, D.
Produce pulse-modulated signal by signal source; Through passing to each adjustable attenuator behind the cable arrival power splitter; Regulate the power of the pulse-modulated signal that arrives each satellite electron load signal receiving end again by adjustable attenuator, realize that pulse-modulated signal is sent to the electronics load of each satellite according to desired signal power.
Concrete testing procedure is following:
1, a kind of method of testing constellation electronics load time difference measurement performance is characterized in that step is following:
(1) test port S is connected with the input end of the first one-to-two power splitter; The output terminal of the first one-to-two power splitter connects the input end of the second one-to-two power splitter and the 3rd one-to-two power splitter respectively; The output terminal of the second one-to-two power splitter and the 3rd one-to-two power splitter is connected an adjustable attenuator respectively, and the output terminal note of four adjustable attenuators is made port A, B, C, D;
(2) utilize vector network analyzer to measure test port S and divide Insertion Loss and the time delay be clipped to port A, B, C, D, four road Insertion Loss are remembered respectively and are made L
A, L
B, L
C, L
D, four tunnel time delays are remembered respectively and are made τ
A, τ
B, τ
C, τ
D
(3) signal source is connected with test port S, four port A, B, C, D connect a satellite electron load respectively;
(4) signal source is set to the pulsed modulation state, exports a series of periodic pulse signals;
(5) damping capacity of adjustment signal source output power and four adjustable attenuators equates the power of the periodic pulse signal that four satellite electron load receive;
(6) periodic pulse signal that four satellite electron load is received is resolved, and obtains four satellite electron load and detects the receipts time that a series of periodic pulse signal arrived, and note is made t respectively
Ai, t
Bi, t
Ci, t
Di, the periodic pulse signal sequence number received for satellite electron load of i wherein;
(7) according to formula t '
Xi=t
Xi-τ
XFour satellite electron load are detectd the receipts time that a series of periodic pulse signal arrived carry out time delay elimination processing, X=A, B, C, D;
(8) the series of periods pulse signal that four satellite electron load after the elimination time delay is received matches according to periodic pulse signal time of arrival; Matching method is: be benchmark the series of periods pulse signal time of arrival that receives with satellite electron load A wherein; The series of periods pulse signal that its excess-three satellite electron load is received compares with benchmark respectively time of arrival; Be the periodic pulse signal of successful matching less than the periodic pulse signal of 3 times of time difference precision wherein with the time difference of benchmark; The periodic pulse signal of successful matching is thought the same periodic pulse signal from signal source output; Write down four satellite electron load and receive the also periodic pulse signal of successful matching, periodic pulse signal sequence time of arrival of successful matching is designated as T
Ai, T
Bi, T
Ci, T
Di, i=1 ... N, n are the periodic pulse signal number of successful matching;
With Fig. 3 is example, continuous 4 periodic pulse signals of signal source output that drawn successively from right to left, and satellite electron load A has received the 1st, 3,4 pulse, does not receive the 2nd pulse; Satellite electron load C has received the 1st, 2,4 pulse, has not received the 3rd pulse; All the other two satellite electron load have all received 4 pulses.The pulse signal that receives according to satellite electron load A is a benchmark, has only the 1st, 4 the pulse successful matching of satellite electron load A.The pulse train of successful matching is designated as T
Ai, T
Bi, T
Ci, T
Di, i=1,2.
(9) periodic pulse signal sequence time of arrival of utilizing satellite electron load A to receive also successful matching receives with all the other satellite electron load respectively and periodic pulse signal sequence time of arrival of successful matching is subtracted each other, and obtains periodic pulse signal time difference T
AXi=T
Ai-T
Xi, X=B, C, D;
(10) according to formula
Time difference measurement performance to constellation electronics load is estimated, as mean square deviation δ
AXThen the time difference measurement performance of constellation electronics load is qualified during precision index to be not more than the time difference, otherwise is defective.
Embodiment:
With four satellite electron load measuring system time difference performances is example, time difference measurement performance under the situation that test constellation electronics load 3GHz signal and power equate, time difference accuracy requirement 100ns.
(1) according to Fig. 1 stube cable, power splitter and adjustable attenuator;
(2) utilize vector network analyzer to measure the 3GHz signal and divide Insertion Loss and the time delay that is clipped to port A, B, C, D, four road Insertion Loss L from test port S
A, L
B, L
C, L
DBe respectively 9.0dB, 9.5dB, 8.7dB, 9.1dB, four tunnel time delay τ
A, τ
B, τ
C, τ
DBe respectively 9ns, 11ns, 10ns, 9ns;
(3) signal source is connected with test port S, four port A, B, C, D connect a satellite electron load respectively, and are as shown in Figure 2;
(4) the signal repetition frequency of signalization source output is 20Hz, and pulse width is 1us.
(5) damping capacity of adjustment signal source power and four adjustable attenuators equates the power of the periodic pulse signal that four satellite electron load receive.
(6) periodic pulse signal that four satellite electron load is received is resolved, and extracts four satellite electron load and in 1 second, detects the time of receiving that a series of periodic pulse signal arrives, and note is made t respectively
Ai, t
Bi, t
Ci, t
Di, according to formula t '
Xi=t
Xi-τ
XFour satellite electron load are detectd the receipts time that a series of periodic pulse signal arrived carry out time delay elimination processing, X=A, B, C, D, concrete test result is seen table 1.
Table 1
(7) test result after the elimination time delay is matched.The periodic pulse signal that receives according to satellite electron load A is a benchmark, the pulse of other Samsung burst length that the A star receives ± 300ns is regarded as successful matching with interior, the pairing result sees shown in Figure 3.
(8) with the pulses that four satellite electron load receive and success is matched, be that benchmark and all the other satellites subtract each other respectively with the pulse arrival time of satellite electron load A, obtain time difference T
AXi=T
Ai-T
Xi(X=B, C, D), as shown in table 2.
Table 2
(10) according to formula
Time difference measurement performance to constellation electronics load is estimated, X=B, C, D, δ
AB, δ
AC, δ
ADTime difference mean square deviation be respectively 42.37ns, 40.72ns, 38.48ns, satisfy time difference accuracy requirement 100ns.
The present invention not detailed description is a technology as well known to those skilled in the art.
Claims (1)
1. method of testing constellation electronics load time difference measurement performance is characterized in that step is following:
(1) test port S is connected with the input end of the first one-to-two power splitter; The output terminal of the first one-to-two power splitter connects the input end of the second one-to-two power splitter and the 3rd one-to-two power splitter respectively; The output terminal of the second one-to-two power splitter and the 3rd one-to-two power splitter is connected an adjustable attenuator respectively, and the output terminal note of four adjustable attenuators is made port A, B, C, D;
(2) utilize vector network analyzer to measure test port S and divide Insertion Loss and the time delay be clipped to port A, B, C, D, four road Insertion Loss are remembered respectively and are made L
A, L
B, L
C, L
D, four tunnel time delays are remembered respectively and are made τ
A, τ
B, τ
C, τ
D
(3) signal source is connected with test port S, four port A, B, C, D connect a satellite electron load respectively;
(4) signal source is set to the pulsed modulation state, exports a series of periodic pulse signals;
(5) damping capacity of adjustment signal source output power and four adjustable attenuators equates the power of the periodic pulse signal that four satellite electron load receive;
(6) periodic pulse signal that four satellite electron load is received is resolved, and obtains four satellite electron load and detects the receipts time that a series of periodic pulse signal arrived, and note is made t respectively
Ai, t
Bi, t
Ci, t
Di, the periodic pulse signal sequence number received for satellite electron load of i wherein;
(7) according to formula t '
Xi=t
Xi-τ
XFour satellite electron load are detectd the receipts time that a series of periodic pulse signal arrived carry out time delay elimination processing, X=A, B, C, D;
(8) the series of periods pulse signal that four satellite electron load after the elimination time delay is received matches according to periodic pulse signal time of arrival; Matching method is: be benchmark the series of periods pulse signal time of arrival that receives with satellite electron load A wherein; The series of periods pulse signal that its excess-three satellite electron load is received compares with benchmark respectively time of arrival; Be the periodic pulse signal of successful matching less than the periodic pulse signal of 3 times of time difference precision wherein with the time difference of benchmark; The periodic pulse signal of successful matching is thought the same periodic pulse signal from signal source output; Write down four satellite electron load and receive the also periodic pulse signal of successful matching, periodic pulse signal sequence time of arrival of successful matching is designated as T
Ai, T
Bi, T
Ci, T
Di, i=1 ... N, n are the periodic pulse signal number of successful matching;
(9) periodic pulse signal sequence time of arrival of utilizing satellite electron load A to receive also successful matching receives with all the other satellite electron load respectively and periodic pulse signal sequence time of arrival of successful matching is subtracted each other, and obtains periodic pulse signal time difference T
AXi=T
Ai-T
Xi, X=B, C, D;
(10) according to formula
Time difference measurement performance to constellation electronics load is estimated, as mean square deviation δ
AXThen the time difference measurement performance of constellation electronics load is qualified during precision index to be not more than the time difference, otherwise is defective.
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| CN104215859A (en) * | 2014-09-19 | 2014-12-17 | 航天东方红卫星有限公司 | Satellite electronic load testing method |
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| CN101251594A (en) * | 2008-04-03 | 2008-08-27 | 北京航空航天大学 | Bidirectional ranging and time comparision process terminal |
| CN101692163A (en) * | 2009-09-24 | 2010-04-07 | 中国计量科学研究院 | Method and system for remotely calibrating frequency standards |
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| CN101251594A (en) * | 2008-04-03 | 2008-08-27 | 北京航空航天大学 | Bidirectional ranging and time comparision process terminal |
| CN101692163A (en) * | 2009-09-24 | 2010-04-07 | 中国计量科学研究院 | Method and system for remotely calibrating frequency standards |
| CN101951296A (en) * | 2010-09-02 | 2011-01-19 | 航天东方红卫星有限公司 | Spread-spectrum TTC integrated testing system for three-satellite parallel testing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215859A (en) * | 2014-09-19 | 2014-12-17 | 航天东方红卫星有限公司 | Satellite electronic load testing method |
| CN104215859B (en) * | 2014-09-19 | 2017-01-25 | 航天东方红卫星有限公司 | Satellite electronic load testing method |
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