CN101963511B - X-ray pulse satellite navigation semi-physical simulation system - Google Patents
X-ray pulse satellite navigation semi-physical simulation system Download PDFInfo
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- CN101963511B CN101963511B CN2010100220357A CN201010022035A CN101963511B CN 101963511 B CN101963511 B CN 101963511B CN 2010100220357 A CN2010100220357 A CN 2010100220357A CN 201010022035 A CN201010022035 A CN 201010022035A CN 101963511 B CN101963511 B CN 101963511B
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Abstract
The invention relates to an X-ray pulse satellite navigation semi-physical simulation system which comprises an X-ray pulse satellite signal simulation system (1), an X-ray detector (21) and an atomic clock (22) of an X-ray pulse satellite navigation detector (2), a navigation and computation terminal (3), a demonstration verifying and estimating processor (41) of a demonstration verifying and estimating terminal (4) and a track generation terminal (5), which are sequentially connected in series, wherein the output end of the track generation terminal (5) is respectively connected with the input ends of the X-ray pulse satellite signal simulation system (1) and the demonstration verifying and estimating processor (41) of the demonstration verifying and estimating terminal (4). In the invention, an X-ray signal generation system and an X-ray detector real object system are adopted, and the track generation terminal is used for generating an arbitrary flight track without flight carrying, thus the testing cost is reduced, and the development period is shortened; and the system has the advantages of simple structure and good universality and has significance to the feasibility verification, the dynamic performance, the system characteristic and the engineering application of X-ray pulse satellite autonomous navigation researches.
Description
Technical field
The present invention relates to a kind of analogue system, especially a kind of X ray pulsar navigation semi-matter simulating system is applicable to the performance verification of X ray pulsar navigation theoretical research level navigational system.
Background technology
Pulsar is the neutron star of high speed rotation.The X ray pulsar is the pulsar that has radiation feature at the X ray wave band, launches X ray through high-intensity magnetic field accelerated band charged.When the inswept observer of the light beam periodicity visual field, can measure the X ray pulse signal.Independent navigation based on the X ray pulsar is a kind of emerging astronomical navigation method, and this method is confirmed movable body position, attitude and time service through this natural celestial body of observation X ray pulsar, is complete autonomous navigate mode.Its precision height, good reliability, applied widely are the effective means that improves spacecraft survivability, reduces cost.
From 1999, propose some X ray pulsar navigation projects abroad successively, and get into the engineering verification stage.Compare abroad, China still is being in the starting stage aspect the X ray pulsar independent navigation.Because the x-ray photon flux density of space X ray pulse star is very low, receive again stopping of earth atmosphere simultaneously, therefore be difficult to observe the X ray pulsar signal on ground, this has brought very big inconvenience for the research of X ray pulsar navigation.Because the expense of flight test is very huge, in research process based on the X ray pulsar navigation, the debugging of the ground of each subsystem, the experimental test of algorithm and the demonstration and verification of each system and assessment can not all be carried through flight and verified.Since but for this brand-new air navigation aid of pulsar navigation; Verify that its feasibility is very necessary; And up to the present available ground experiment verification system does not appear as yet, it is necessary to design a kind of effective X ray pulsar navigation ground experiment verification system so.
Summary of the invention
The technical matters that the present invention will solve is; Backward situation to prior art; A kind of X ray pulsar navigation semi-matter simulating system is provided, and this system can be competent at the checking of X ray pulsar navigation ground experiment fully, carries verification experimental verification thereby substitute expensive flight.
Technical solution of the present invention is; Said X ray pulsar navigation semi-matter simulating system; Referring to Fig. 1, terminal 5 takes place by X ray pulsar signal simulation system 1, X ray pulsar navigation detector 2, navigation calculating terminal 3, demonstration and verification and assessment terminal 4 and track and forms in this system.Wherein, X ray pulsar navigation detector 2 is made up of X-ray detector 21 and atomic clock 22, and the two connects this X-ray detector 21 and atomic clock 22 in regular turn; Demonstration and verification is made up of with display 42 demonstration and verification and evaluation process device 41 with assessment terminal 4.Said demonstration and verification is connected the input end of display 42 with the output terminal of evaluation process device 41.Connect with evaluation process device 41 with the demonstration and verification at assessment terminal 4 with demonstration and verification in regular turn in above-mentioned X ray pulsar signal simulation system 1, X ray pulsar navigation detector 2, navigation calculating terminal 3.The output terminal that terminal 5 takes place above-mentioned track connects X ray pulsar signal simulation system 1 and demonstration and verification and the demonstration and verification at assessment terminal 4 and the input end of evaluation process device 41 respectively.
When the X ray pulsar navigation semi-matter simulating system of the present invention that constitutes is thus worked; Terminal 5 takes place and produces the nominal trajectory data in its track, and these data are delivered to demonstration and verification and the demonstration and verification of assessing terminal 4 and evaluation process device 41 and X ray pulsar signal simulation system 1 respectively; X ray pulsar signal simulation system 1 generates the X ray pulsar signal that spacecraft observes at rail according to the nominal trajectory data; The X-ray detector 21 of X ray pulsar navigation detector 2 is used for the detecting x-ray photon and whether arrives detector; When detecting x-ray photon, then produce pulse electrical signal, arrive the time data of detector through these electric signal excimer secondary clock 22 record x-ray photons; Navigation calculating terminal 3 takes place X ray pulsar navigation detector 2 image data on the nominal trajectory data that terminal 5 generates through the synchronous processing track that is added to; Obtain the X ray pulsar signal through the pulse arrival time algorithm for estimating and arrive the time of surveying, realize navigation calculating through filtering algorithm.The nominal orbital data of terminal 5 generations and the data of navigation calculating terminal 4 outputs take place according to track in demonstration and verification and evaluation process device 41, realize the demonstration and verification and the assessment of native system.
Principle of the present invention is: utilize track that the terminal takes place and generate the nominal trajectory data, export to X ray signal imitation system and navigation calculating terminal, unify the standard input as the information processing reference source, improved navigation demonstration and verification quality effectively; The X ray pulsar signal that X ray pulsar signal simulation system is measured at rail according to nominal trajectory digital simulation spacecraft, and the detection record x-ray photon arrives the time of detector; The navigation calculating terminal receives the data of X ray pulsar signal simulation system and accomplishes navigation calculating, realizes the demonstration and verification of system in conjunction with the nominal orbital data.
The invention has the beneficial effects as follows: adopt X ray signal generating system and X-ray detector system in kind; Use track that the terminal takes place and generate any flight path; The lift-launch of need not flying effectively reduces the experimentation cost of X ray pulsar navigation system, has shortened the lead time.And system architecture is simple, versatility is good, and is significant to feasibility checking, dynamic property, system performance and the practical applications of the research of X ray pulsar independent navigation, effectively promoted carrying out of this area research work.
Description of drawings:
Fig. 1 is the structured flowchart of a specific embodiment of the present invention, is denoted as among the figure:
1---X ray pulsar signal simulation system,
2---X ray pulsar navigation detector
21---X-ray detector
22---atomic clock
3---the navigation calculating terminal
4---show checking and assessment terminal
41---demonstration and verification and evaluation process device
42---display
5---the terminal takes place in track
Embodiment:
Referring to Fig. 1, terminal 5 takes place by X ray pulsar signal simulation system 1, X ray pulsar navigation detector 2, navigation calculating terminal 3, demonstration and verification and assessment terminal 4 and track and forms in this routine X ray pulsar navigation semi-matter simulating system.X ray pulsar signal simulation system 1 wherein adopts the Chinese Changsha product XRS-09 of National University of Defense technology type polycyclic signal generating system; X ray pulsar navigation detector 2 is made up of X-ray detector 21 and atomic clock 22.Wherein X-ray detector 21 can be selected X ray that can sense radiation generator institute transmit frequency band for use and have the X-ray detector than high time resolution, adopts Britain Micron company to produce 6 inches rectangle silicon strip detectors here; Atomic clock 22 selects for use U.S. SRS company to produce PRS10 type rubidium atomic clock, and this atomic clock has the advantage that overall dimensions are little, low in energy consumption, preheating time is short and frequency stability is high.Adopt with ARM at navigation calculating terminal 3 is the A3P1000 type FPGA of core, and A3P1000 has system's dominant frequency of 350MHz, can satisfy the demand of navigation calculating.The data that X ray pulsar navigation detector 2 collects are read at navigation calculating terminal 3; Obtain the time that the X ray pulsar signal arrives detector 2 through the pulse arrival time algorithm for estimating; Utilize advanced filtering algorithm and combine the dynamics of orbits model, solve the positional information of carrier; Demonstration and verification is made up of with display 42 demonstration and verification and evaluation process device 41 with assessment terminal 4.Wherein, the commercially available TE-2440 development board that demonstration and verification and evaluation process device 41 adopts based on the ARM920T platform, this development board has dominant frequency to be the Samsung S3C2440A processor of 400MHz and to have the standard VGA interface.Display 42 adopts the commercially available LG product W1942sp of group escope.Display 42 at first shows according to the navigation information data and the nominal orbital data that receive in real time; Accomplish the real-time demonstration and the flight path checking of navigation error curve then; To calculating the navigation error data sequence that obtains, adopt error criterion difference and two kinds of methods of mean square deviation to carry out the assessment of navigation performance at last.Demonstration and verification and evaluation process device 41 directly connect display 42 with its VGA interface, promptly are connected the input end of display 42 with the output terminal of evaluation process device 41 with demonstration and verification; And path generator 5 adopts commercially available 32 TMS320F2812 type dsp processor, and this processor host frequency is 150M, and inside is furnished with the 256k flash memory.According to classification of track and parameter, path generator 5 produces the standard trajectory data, comprises the normal datas such as position, speed and attitude of spacecraft, sends orbital data to X ray pulsar signal simulation system 1 and demonstration and verification and assessment terminal 4 respectively then.Connect with evaluation process device 41 with the demonstration and verification at assessment terminal 4 with demonstration and verification in regular turn in above-mentioned X ray pulsar signal simulation system 1, X ray pulsar navigation detector 2, navigation calculating terminal 3.The output terminal that terminal 5 takes place above-mentioned track connects X ray pulsar signal simulation system 1 and demonstration and verification and the demonstration and verification at assessment terminal 4 and the input end of evaluation process device 41 respectively.
Claims (1)
1. X ray pulsar navigation semi-matter simulating system; It is characterized in that; Terminal (5) takes place by X ray pulsar signal simulation system (1), X ray pulsar navigation detector (2), navigation calculating terminal (3), demonstration and verification and assessment terminal (4) and track and forms in this system; Wherein, X ray pulsar navigation detector (2) is made up of X-ray detector (21) and atomic clock (22), and this X-ray detector (21) and atomic clock (22) are connected in regular turn; Demonstration and verification is made up of demonstration and verification and evaluation process device (41) and display (42) with assessment terminal (4); Said demonstration and verification is connected the input end of display (42) with the output terminal of evaluation process device (41); Connect with evaluation process device (41) with the demonstration and verification at assessment terminal (4) with demonstration and verification in regular turn in above-mentioned X ray pulsar signal simulation system (1), X ray pulsar navigation detector (2), navigation calculating terminal (3); The output terminal that terminal (5) takes place above-mentioned track connects X ray pulsar signal simulation system (1) and demonstration and verification and the demonstration and verification at assessment terminal (4) and the input end of evaluation process device (41) respectively; The nominal trajectory data of terminal (5) output take place in above-mentioned X ray pulsar signal simulation system (1) according to track; Generate the X ray pulsar signal data of spacecraft in rail observation; The X-ray detector (21) of X ray pulsar navigation detector (2) is used for the detecting x-ray photon and whether arrives X-ray detector (21); When detecting x-ray photon, then produce pulse electrical signal, arrive the time data of X-ray detector (21) through this electric signal excimer secondary clock (22) record x-ray photon; Navigation calculating terminal (3) takes place X ray pulsar navigation detector (2) image data on the nominal trajectory data that terminal (5) generates through the synchronous processing track that is added to; Obtain the time that the X ray pulsar signal arrives X-ray detector (21) through the pulse arrival time algorithm for estimating, realize navigation calculating through filtering algorithm; Demonstration and verification and evaluation process device (41) utilize track that nominal trajectory data and navigation calculating terminal (3) output data that terminal (5) generates take place, and realize the demonstration and verification and the assessment of native system.
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| CN103105811B (en) * | 2012-12-29 | 2015-05-27 | 中国空间技术研究院 | Ground test signal control system for X-ray pulsar navigation |
| CN103048000B (en) * | 2012-12-29 | 2015-07-22 | 中国空间技术研究院 | X-ray pulsar navigation ground test system |
| CN103308073B (en) * | 2013-05-30 | 2015-10-28 | 上海交通大学 | Strap down inertial navigation/combinations of satellites navigation detection system and emulation test method thereof |
| CN103531072B (en) * | 2013-09-29 | 2015-04-15 | 天津航天机电设备研究所 | X-ray pulsar ground acquisition and tracking demonstration system |
| CN104729533B (en) * | 2015-03-11 | 2017-12-22 | 北京控制工程研究所 | A kind of pulsar celestial autonomous navigation simulation demo verifies system and method |
| CN110068339A (en) * | 2018-01-22 | 2019-07-30 | 方美华 | The ground simulation positioning system and localization method of X-ray pulsar space navigation |
| CN109084805B (en) * | 2018-09-21 | 2022-03-11 | 中国人民解放军61540部队 | X-ray pulsar navigation terminal test system and method thereof |
| CN109870711A (en) * | 2018-11-27 | 2019-06-11 | 山东航天电子技术研究所 | A kind of pulsar navigation proof of algorithm platform and verification method |
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Non-Patent Citations (2)
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| 孙守明等.INS辅助X射线脉冲星导航研究.《中国空间科学学会第七次学术年会》.2009,全文. * |
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