CN108680187A - X-ray pulsar navigation ground validation system based on visible light source - Google Patents
X-ray pulsar navigation ground validation system based on visible light source Download PDFInfo
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Abstract
The X-ray pulsar navigation ground validation system based on visible light source that the invention discloses a kind of, mainly solve the problems, such as that the complicated and analog form low with analog pulse star signal period precision of existing system is single, it includes outline data generation unit (1), plurality of voltages signal output unit (2), photon generates unit (3) and electronics sensing element (4), navigate authentication unit (5), outline data generation unit receives the control command of navigation authentication unit, and read data from navigation authentication unit, it generates outline data and is transmitted to plurality of voltages signal output unit, output multi-channel voltage signal drives photon to generate unit, output multi-channel electric impulse signal is to electronics sensing element, pulse arrival time is demarcated, and time series is transmitted to navigation authentication unit.The configuration of the present invention is simple, signal period stability is high, can be used for the verification to a variety of navigation algorithms.
Description
Technical field
The present invention relates to space technology field, more particularly to a kind of X-ray pulsar navigation ground validation system can be used for
It is flat to provide experiment for pulsar navigation correlation theory research for verification to the X-ray pulsar navigation algorithm in photon level
Platform.
Background technology
X-ray pulsar independent navigation is a kind of entirely autonomous air navigation aid with development prospect, has grand strategy
Research significance, by the concern of domestic and foreign scholars.From 1999, each spacefaring nation in the world started X-ray pulsar one after another
The work such as correlation theory of navigating research, flight experiment verification.It European Space Agency, Russia and Japan and other countries and has organized big
The principle prototype of amount is verified and the work such as flight experiment.U.S. NASA in 2017 has carried out a Station Explorer
The experiment of for X-ray Timing and Navigation Technology.X-ray pulsar is equally carried out and has led in the country
Correlative study of navigating works, and especially achieves great successes in terms of theoretical and ground validation systematic research.
But since pulsar is very remote apart from the earth, so the decaying of X-ray pulsar signal is extremely serious, reach
The signal of detector is very faint so that the observation of X-ray pulsar signal is more difficult, and can not to penetrate the earth big for X-ray
Gas-bearing formation；Space flight test is expensive, risk is larger, and a set of X-ray pulsar navigation algorithm real-time verification is established on ground
System is particularly important.
According to published patent application, in recent years, domestic ground simulation system is mainly the following：
1. a kind of ground simulation method and device with X-ray pulsar navigation, Authorization Notice No.：CN101782390B,
The device has used x-ray source to be tested, and has advantage in terms of X-ray detector technical research, but due to mechanical structure
Introducing, the simulation precision for resulting in pulsar cyclophysis is relatively low, cannot meet the needs of theoretical research.
2. having high time-frequency stability X-ray pulsar photon signal ground simulation system, patent application publication number：
CN102778236A, the system remain the physical process of simulation, and simulation is with a high credibility, and has very high time-frequency stability
With precision, but have the drawback that：It can not simulate the pulsar signal with more physical characteristics, including pulsar rotation characteristic,
Pulsar timing noise characteristic and the Doppler effect generated by spacecraft movement.
3.X ray pulse stars navigation ground system test, application publication number：CN103048000A, the pilot system are that X is penetrated
Line pulse signal is simulated and the closed loop test system of navigation algorithm verification, it is contemplated that and many factors in real space influence, but
It is the control structure of system and complicated for operation, it is in large scale, it is unfavorable for flexibly using in the lab.
Invention content
It is an object of the invention in view of the above shortcomings of the prior art, propose a kind of X-ray arteries and veins based on visible light source
It rushes star navigation ground validation system and improves the simulation precision of pulsar cyclophysis to simplify the structure of system, realize to multichannel
The simulation of pulsar signal.
To achieve the above object, the present invention is based on the X-ray pulsar navigation ground validation systems of visible light source, including：
Outline data generation unit, photon generate unit and electronics sensing element, it is characterised in that：
It is connected with navigation authentication unit between outline data generation unit and electronics sensing element, is used for outline data
Generation unit sends control command and transmission data, and receives the photon arrival time sequence of electronics sensing element transmission, deposits
Store up navigation data；
Plurality of voltages signal output unit is connected between outline data generation unit and electronics sensing element, being used for will
The pulsar profile sequence of values that outline data generation unit is sent is converted into plurality of voltages signal simultaneously, and electron is read
Unit provides synchronizing clock signals；
Photon generates unit, using multichannel single photon generator, and is connected to plurality of voltages signal output unit and electronics
Between learning sensing element, the plurality of voltages signal for exporting plurality of voltages signal output unit is converted into multipath light signal,
And decay and be converted into multichannel electric impulse signal at multichannel monochromatic light subsequence, then by multichannel monochromatic light subsequence, it is transmitted to electronics reading
Go out unit.
Further, the plurality of voltages signal output unit is set there are one input terminal and two output ends, input terminal and wheel
The output end of wide data generating unit unidirectionally connects；First output end output multi-channel voltage signal generates the defeated of unit with photon
Enter the unidirectional connection in end；Second output terminal exports synchronizing clock signals, is unidirectionally connect with the input terminal of electronics sensing element.
Further, the navigation authentication unit includes：
Presentation layer, for navigational parameter to be arranged, real-time exhibition navigation results realize human-computer interaction；
Business Logic, for carrying out data transmission respectively with outline data generation unit and electronics sensing element, and
Analysis meter counts evidence；
Data access layer is transmitted for the data between Business Logic and data Layer；
Data Layer, intermediate data when for storage pulse star parameter, user setting parameter and system operation.
The present invention has the following advantages compared with existing pulsar navigation ground validation system：
1. it is of the invention due to being connected with navigation authentication unit between outline data generation unit and electronics sensing element,
Navigation authentication unit sends out control command and can directly be received by outline data generation unit, and outline data generation unit can be with
The data in navigation authentication unit are directly read, control logic is simplified.
2. the present invention between outline data generation unit and electronics sensing element due to being connected with plurality of voltages signal
Output unit remains more physical characteristics of the signal of outline data generation unit generation and improves the cycle stability degree of signal.
3. unidirectional connection type of the present invention due to generating unit provided with plurality of voltages signal output unit and photon, light
Son generates unit and uses visible light source, simplifies system structure；And can simultaneously Multipexer pulsar signal, can support a variety of lead
The verification of boat algorithm.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the outline data generation unit structural schematic diagram in the present invention；
Fig. 3 is the navigation authentication unit structural schematic diagram in the present invention.
Specific implementation mode
Explanation is further explained to the present invention below in conjunction with attached drawing；
Referring to Fig.1, the present invention includes：Outline data generation unit 1, plurality of voltages signal output unit 2, photon generate single
Member 3, electronics sensing element 4, navigation authentication unit 5, wherein：The photon generates unit 3 by multichannel photon generator and light
Shielding cavity composition is learned, per including automatically controlled linear light sorurce, optical attenuator is placed in optics shielding intracavitary all the way；Multichannel photon
The input terminal of generator includes four tunnels but is not limited to four road interfaces, and output end includes four tunnels but is not limited to four road interfaces, should
The way of input end interface is equal with the way that it exports end interface.
The outline data generation unit 1 is unidirectional through but not limited to PCI-E interface and plurality of voltages signal output unit 2
Connection, the plurality of voltages signal output unit 2 are set there are one input terminal and two output ends, and input end interface uses but not office
It is limited to PCI-E, output end interface uses conductor terminal, input terminal to be generated by PCI-E interface connecting line and outline data
The output end of unit 1 unidirectionally connects；Its first output end output multi-channel voltage signal, passes through shielded wire and multichannel photon respectively
The input end interface of generator unidirectionally connects, this example takes four tunnels but is not limited to four tunnels；When the output of its second output terminal is synchronous
Clock signal is unidirectionally connect by shielded wire with the input terminal of electronics sensing element 4；
The photon generates unit 3 and is connected to plurality of voltages signal output unit 2 and electronics reading by shielded wire
Between unit 4；The electronics sensing element 4 is set there are two input terminal and an output end, and input end interface is connected using conducting wire
Terminal, output end interface use but are not limited to RS232 interface, and first input end includes multichannel interface, passes through shielding respectively
Conducting wire is unidirectionally connect with the multiple-channel output end interface of multichannel photon generator, this example takes four tunnels but is not limited to four tunnels；It
Two input terminals are unidirectionally connect by shielded wire with the second output terminal of plurality of voltages signal output unit 2；Its output end guide
The authentication unit 5 that navigates sends photon arrival time sequence, passes through the input terminal list of RS232 interface connecting line and navigation authentication unit 5
To connection；Navigation authentication unit 5 is bi-directionally connected with outline data generation unit 1 by Ethernet interface realization.
Outline data generation unit 1 receives the control command that navigation authentication unit 5 is sent, and from navigation authentication unit 5
Spacecraft orbit data are read, outline data is then generated and are transmitted to plurality of voltages signal output unit 2, plurality of voltages signal
First output end output multi-channel voltage signal of output unit 2, driving photon generate unit 3 in multichannel photon generator it is automatically controlled
Linear light sorurce generates multichannel visible light, decays into multichannel monochromatic light subsequence by optical attenuator, then by photomultiplier by multichannel
Monochromatic light subsequence is converted into multichannel electric impulse signal, is transmitted to electronics sensing element 4, plurality of voltages signal output unit 2
Second output terminal exports synchronizing clock signals, and electron sensing element 4 provides clock, and electronics sensing element 4 is to electric pulse
Signal carries out time calibrating, obtains photon arrival time sequence, and photon arrival time sequence is transmitted to navigation authentication unit
5, navigation authentication unit 5 calls the navigation algorithm that user writes, and carries out time adjustment to photon arrival time sequence, until leading
The authentication unit 5 that navigates is sent to outline data generation unit 1 terminates order, and system stops.
With reference to Fig. 2, the outline data generation unit 1, including master-slave system communication interface 11, photon velocity function calculate
Module 12, multi-mode signal synthesis module 13, multipath signal propagation control module 14 and emulation display module 15, wherein：
Master-slave system communication interface 11, using but be not limited to Ethernet interface, sent for receiving navigation authentication unit 5
Control command, and be sent to request command and carry out data transmission；
Photon velocity function computation module 12, using but be not limited to C Plus Plus and write, in real time with the set time
The value of photon velocity function at interval calculation multichannel spacecraft obtains the sequence of values of multichannel photon velocity function, and by multichannel
The sequence of values of photon velocity function is transferred in multi-mode signal synthesis module 13；
Multi-mode signal synthesis module 13, using but be not limited to C# language and write, for by Three models by multichannel
The sequence of values generated data packet of photon velocity function；The first pattern is to distinguish the sequence of values of multichannel photon velocity function
Respective data packet is synthesized, second of pattern is that the sequence of values of multichannel photon velocity function is synthesized a data packet, third
Kind pattern is to synthesize a data packet after being added the sequence of values of multichannel photon velocity function；
Multipath signal propagation control module 14, using but be not limited to C# language and write, closed for obtaining multi-mode signal
At the data packet that module 13 synthesizes, and it is transferred to the plurality of voltages signal output unit 2 continuously and in real-time；
Emulate display module 15, using but be not limited to C# and WPF language and write, for obtaining master-slave system communication interface
The data packet that 11 data received and multi-mode signal synthesis module 13 synthesize, real-time display simulation time, pulsar signal
Waveform, frequency parameter and location parameter.
With reference to Fig. 3, the navigation authentication unit 5, including presentation layer 51, Business Logic 52, data access layer 53, data
Layer 54, wherein：
Presentation layer 51, using but be not limited to C# and WPF language and write, for navigational parameter, real-time exhibition navigation to be arranged
As a result, realizing human-computer interaction, it includes setting interface 511, virtual scene interface 512, navigation engineering interface 513 and navigation results
Show interface 514, wherein：
Interface 511 is set, using but be not limited to C# and WPF language and write, for adding pulsar ginseng to data Layer 54
Number, and is arranged the parameter of whole system, wherein pulsar parameter include number, flow, frequency parameter, with reference to epoch time area
Between, with reference to epoch, profile, right ascension and declination, the parameter of wherein system includes system real-time time, navigation authentication unit 5 and electricity
Son learns message transmission rate, data transmission speed between authentication unit 5 and outline data generation unit 1 of navigating between sensing element 4
Rate；
Virtual scene interface 512, using but be not limited to OpenGL graphics development software packets, for showing that three-dimensional is led
Scene of navigating and navigation results data；
Navigation engineering interface 513, using but be not limited to C# and WPF language and write, include boat for navigational parameter to be arranged
Its device trajectory files, spacecraft initial error, observation interval, pulsar signal simulation model and the storage of navigation algorithm file
Path, wherein spacecraft orbit file use txt format text files, the position of the spacecraft in spacecraft orbit file and speed
Degree describes under J2000.0 geocentric coordinate systems, and navigation algorithm file is the script file write based on MATLAB；
Navigation results show interface 514, using but be not limited to C# and WPF language and write, for showing navigation results, and
Navigation results are assessed from time Convergence and convergence rate；
Business Logic 52, using but be not limited to C# and C Plus Plus is write, for respectively with outline data generation unit
1 and electronics sensing element 4 carry out data transmission, and analysis meter counts evidence, it includes dynamic link library 521, display module
522, file management 523, time series coffret 524 and master-slave system communication interface 525, wherein：
Dynamic link library 521, is write using C Plus Plus, for providing operation program, including：The search of planet ephemeris, pulse
Star visibility analysis, pulsar preferably, track generations, time scale conversion, time adjustment, time delay estimadon and simulate space flight
The sequence of photon arrival time at device；
Authentication module 522, using but be not limited to C# language and write, the program for being provided by data access layer 53 connects
Mouth accesses data Layer 54, and calls the operation program in dynamic link library 521, and operation result is stored in navigation results 545；
File management 523, using but be not limited to C# language and write, for managing navigation initial parameter file, navigation is calculated
Method file, photon reach time series file, spacecraft orbit file and system operation error message file, wherein navigation is initial
Parameter File preserves simulated time starting point, simulated time length, observation interval, the parameter for observing pulsar and spacecraft
Initial error；
Time series coffret 524, using but be not limited to RS232 interface, for connecting electronics sensing element 4
Output end；
Master-slave system communication interface 525, using but be not limited to Ethernet interface, for connecting profile data generating unit
1 input terminal；
Data access layer 53, using but be not limited to C# language and write, for Business Logic 52 and data Layer 54 it
Between data be transmitted, it includes database table single operation 531 and file read-write 532, wherein：
Database table single operation 531 connects for providing the database program in access data Layer 54 to Business Logic 52
Mouthful, including：Data search routine interface, data inserter interface and data delete routine interface；
File read-write 532, the routine interface for providing file in access data Layer 54 to Business Logic 52, including：
File read-write routine interface, document creation routine interface and file delete routine interface；
Data Layer 54, using but be not limited to SQL Server databases and txt format text files, be used for storage pulse
Intermediate data when star parameter, user setting parameter and system operation, it includes spacecraft relevant parameter library 541, pulsar library
542, photon sequence 543, navigation algorithm 544 and navigation results 545, wherein：
Spacecraft relevant parameter library 541, for storing spacecraft orbit information, including the semi-major axis of orbit of spacecraft, rail
Road eccentricity, orbit inclination angle, right ascension of ascending node, perigee angle and the mean anomaly of specified epoch and spacecraft exist
Position, speed under J2000.0 geocentric coordinate systems and corresponding time；
Pulsar library 542, is used for the preferred table of storage pulse star and pulsar parameter, and pulsar parameter includes：Number, stream
Amount, frequency parameter, with reference to epoch time section, with reference to epoch, profile, right ascension and declination, the wherein preferred table of pulsar is foundation
The size of the geometric dilution of precision of different pulsars combination and establish, profile is indicated with 1024 numerical value, and right ascension and declination exist
It is indicated under J2000.0 solar system barycenter celestial coordinate systems；
Photon sequence 543, the photon arrival time sequence for storing the transmission of electronics sensing element 4, with xlse formats
Form document stores；
Navigation algorithm 544, the navigation algorithm file for preserving user's load, navigation algorithm file are compiled based on MATLAB
The m format script files write；
Navigation results 545 are stored for storing navigation results with txt format text files.
Above example is only not constitute any restrictions to the content of present invention to the reference explanation of the present invention, it is clear that
For those skilled in the art, after having understood the content of present invention and principle, all may without departing substantially from the principle of the invention,
In the case of structure, carry out various modifications and variations in form and details, but these amendments based on inventive concept and
Change still within the claims of the present invention.
Claims (10)
1. the X-ray pulsar navigation ground validation system based on visible light source, including：Outline data generation unit (1), photon
Generate unit (3) and electronics sensing element (4), it is characterised in that：
It is connected with navigation authentication unit (5) between outline data generation unit (1) and electronics sensing element (4), is used for wheel
Wide data generating unit (1) sends control command and transmission data, and the photon for receiving electronics sensing element (4) transmission reaches
Time series stores navigation data；
Plurality of voltages signal output unit (2) is connected between outline data generation unit (1) and electronics sensing element (4),
Pulsar profile sequence of values for sending outline data generation unit (1) is converted into plurality of voltages signal simultaneously, and gives
Electronics sensing element (4) provides synchronizing clock signals；
Photon generates unit (3), using multichannel single photon generator, and is connected to plurality of voltages signal output unit (2) and electricity
Between son learns sensing element (4), for the plurality of voltages signal that plurality of voltages signal output unit (2) exports to be converted into multichannel
Optical signal, and decay and be converted into multichannel electric impulse signal at multichannel monochromatic light subsequence, then by multichannel monochromatic light subsequence, it is transmitted to electricity
Son learns sensing element (4).
2. system according to claim 1, which is characterized in that plurality of voltages signal output unit (2) is set there are one defeated
Enter end and two output ends, input terminal is unidirectionally connect with the output end of outline data generation unit (1)；The output of first output end is more
Road voltage signal, the input terminal that unit (3) is generated with photon are unidirectionally connect；Second output terminal exports synchronizing clock signals, with electricity
The input terminal that son learns sensing element (4) unidirectionally connects.
3. system according to claim 1, which is characterized in that the outline data generation unit (1), including：
Master-slave system communication interface (11), the control command sent for receiving the navigation authentication unit (5), and be sent to
Request command carries out data transmission；
Photon velocity function computation module (12), the value for calculating photon velocity function at spacecraft in real time；
Multi-mode signal synthesis module (13), for being closed the value of photon velocity function at spacecraft by three kinds of different patterns
At data packet；
Multipath signal propagation control module (14), continuity and real-time for ensureing data packet transmission, and be transferred to described
Plurality of voltages signal output unit (2)；
Display module (15) is emulated, for real-time display simulation time, the waveform of pulsar signal, frequency parameter and position ginseng
Number.
4. system according to claim 1, which is characterized in that the multichannel single photon generate unit (3) per all the way
Include automatically controlled linear light sorurce, optical attenuator, photomultiplier is placed in optics shielding intracavitary, and every timesharing all the way generates not
Same pulsar signal, while more pulsar signals in visual field are generated, it is fixed to generate a pulsar signal.
5. system according to claim 1, which is characterized in that the electronics sensing element (4) set there are two input
End and an output end, first input end receives photon and generates the multichannel electric impulse signal that unit (3) exports, with its output end list
To connection；Second input terminal receives the synchronizing clock signals that plurality of voltages signal output unit (2) exports, with its second output terminal
Unidirectional connection；Output end sends photon arrival time sequence to navigation authentication unit (5), is unidirectionally connect with its input terminal.
6. system according to claim 1, which is characterized in that the navigation authentication unit (5) includes：
Presentation layer (51), for navigational parameter to be arranged, real-time exhibition navigation results realize human-computer interaction；
Business Logic (52), for carrying out data biography with outline data generation unit (1) and electronics sensing element (4) respectively
It is defeated, and analysis meter counts evidence；
Data access layer (53) is transmitted for the data between Business Logic (52) and data Layer (54)；
Data Layer (54), intermediate data when for storage pulse star parameter, user setting parameter and system operation.
7. system according to claim 6, which is characterized in that presentation layer (51) includes：
It is arranged interface (511), for adding pulsar parameter to data Layer (54), the parameter of whole system is set；
Virtual scene interface (512), for showing three-dimensional navigation scenarios and real-time navigation result data；
Navigation engineering interface (513), for navigational parameter to be arranged, including：Spacecraft orbit file, is seen spacecraft initial error
Survey time span, pulsar signal simulation model and navigation algorithm file store path；
Navigation results show interface (514), for showing navigation results, and are tied to navigation from time Convergence and convergence rate
Fruit is assessed.
8. system according to claim 6, which is characterized in that Business Logic (52) includes：
Dynamic link library (521), for providing operation program, including：The search of planet ephemeris, pulsar visibility analysis, pulse
Star preferably, track generation, time scale conversion, time adjustment, photon arrival time at time delay estimadon and Simulated Spacecraft
Sequence；
Authentication module (522), the routine interface for being provided by data access layer (53) access data Layer (54), and call dynamic
Operation program in state chained library (521)；
File management (523), for manage navigation initial parameter file, navigation algorithm file, photon reach time series file,
Spacecraft orbit file and system operation error message file；
Time series coffret (524), the output end for connecting electronics sensing element (4)；
Master-slave system communication interface (525), the input terminal for connecting profile data generating unit (1).
9. system according to claim 6, which is characterized in that data access layer (53) includes：
Database table single operation (531), for providing the program for accessing database in data Layer (54) to Business Logic (52)
Interface；
File read-write (532), for providing the routine interface for accessing file in data Layer (54) to Business Logic (52).
10. system according to claim 6, which is characterized in that data Layer (54) includes：
Spacecraft relevant parameter library (541), for storing spacecraft orbit information；
Pulsar library (542), is used for the preferred table of storage pulse star and pulsar parameter, and pulsar parameter includes：Number, flow,
Frequency parameter, with reference to epoch time section, with reference to epoch, profile, right ascension and declination；
Photon sequence (543), the photon arrival time sequence for storing electronics sensing element (4) transmission；
Navigation algorithm (544), the navigation algorithm file for preserving user's load；
Navigation results (545), for storing navigation results.
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