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Ground test signal control system for X-ray pulsar navigation

A technology for pulsar navigation and ground testing, which is applied in general control systems, control/regulation systems, program control, etc., and can solve the problem of difficult to achieve arbitrary waveform pulse profiles, low modulating frequency, and unexplained arbitrary waveform pulse profile generation. Issues such as implementation methods and steps

Inactive Publication Date: 2013-05-15
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0003] At present, regarding the research on the X-ray pulsar navigation ground test system, the invention patent "X-ray pulsar navigation hardware-in-the-loop simulation system" (201010022035.7) only briefly introduces a system composition to realize the X-ray pulsar navigation hardware-in-the-loop simulation, and does not Detailed implementation of each component; "A ground simulation method and device for X-ray pulsar navigation" (201010140837.8) invention patent The X-ray pulsar navigation ground simulation device uses a mechanical modulation method to generate For a pulse signal with a certain profile, since the modulation disc needs to be replaced frequently to simulate different pulsars, this method is cumbersome to operate and the stability of the generated pulse profile is poor, the modulation frequency is not high, and it is difficult to achieve an arbitrary waveform pulse profile; "a "Arbitrary Waveform X-ray Generating Device and Method" (201210087972.X) invention patent, which does not explain the specific implementation and steps of the arbitrary waveform pulse profile generation method

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  • Ground test signal control system for X-ray pulsar navigation

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[0031] like figure 1 As shown, the X-ray pulsar navigation ground test signal control device of the present invention includes: FPGA chip 1, high stability clock module 2, USB communication module 3, SRAM data temporary storage module 4, FLASH data storage module 5, digital-to-analog conversion module 6 , a low-pass filter module 7 and a power amplification module 8. As shown in FIG. 2 , in the direct digital frequency synthesis method of the present invention, the FPGA chip 1 includes a phase increment register 11 , an adder 12 and a phase accumulator 13 .

[0032]The USB communication module 3 provides a data transmission channel between the FPGA chip 1 and the host computer, and the X-ray pulsar pulse profile data stored on the host computer is stored in the FLASH data storage module 5 under the control of the FPGA chip 1 through the USB communication module 3 . On the host computer control software, set the frequency control word K of the pulse contour signal, store it in...

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Abstract

The invention relates to the technical field of spacecraft autonomous navigation, in particular to a ground test signal control system for X-ray pulsar navigation. The control system comprises a database module, a time delay module, a pulsar numbering module, a period control module, a stable time module, a communication module, a static random access memory (SRAM) data temporary storage module, a FLASH data storage module, a digital-to-analogue conversion module, an address coding module, a low-pass filtering module, a power amplification module, a phase increment storage module, an addition module, a phase accumulation module and a peripheral equipment X-ray source. The control system is suitable for an X-ray pulsar navigation ground test verification system, and is used for ground semi-physical closed loop verification of relative key techniques of the X-ray pulsar navigation, such as calibration of a space X-ray probe, extraction of a pulse profile, measurement of pulse phases, confirmation of pulse arrival time, large-scale space-time basic standards and verification for navigation algorithm.

Description

technical field [0001] The invention belongs to the technical field of spacecraft autonomous navigation, and relates to an X-ray pulsar navigation ground test signal control system. Background technique [0002] X-ray pulsar navigation provides a feasible way for long-term high-precision autonomous navigation of spacecraft. Before launching the X-ray pulsar navigation space test, it is necessary to verify the key technologies related to X-ray pulsar navigation on the ground. However, the X-rays radiated by pulsars are difficult to pass through the dense atmosphere of the earth, so it is necessary to establish an X-ray pulsar simulation source. system to realize the analog output of pulsar X-rays. [0003] At present, regarding the research on the X-ray pulsar navigation ground test system, the invention patent "X-ray pulsar navigation hardware-in-the-loop simulation system" (201010022035.7) only briefly introduces a system composition to realize the X-ray pulsar navigation ...

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Application Information

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IPC IPC(8): G05B19/042
Inventor 吴耀军徐立宏帅平贝晓敏
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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