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Large-scale space-time and on-orbit dynamic effect simulation method

A simulation method and large-scale technology, applied to measuring devices, instruments, integrated navigators, etc., can solve problems such as large-scale space-time reference simulation design schemes that have not yet been retrieved

Inactive Publication Date: 2013-04-17
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

However, no complete design scheme or dedicated discussion on large-scale spatio-temporal benchmark simulation has been retrieved so far

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  • Large-scale space-time and on-orbit dynamic effect simulation method
  • Large-scale space-time and on-orbit dynamic effect simulation method
  • Large-scale space-time and on-orbit dynamic effect simulation method

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[0049] The large-scale spatio-temporal reference simulation scheme is characterized by including: a large-scale spatio-temporal reference model, a pulse arrival time conversion model and a large-scale spatio-temporal reference simulation technology. Among them, the large-scale space-time reference model is based on the framework of general relativity, using metric tensor and post-Newton approximation relationship to establish a space measurement system, a unified time system and its corresponding reference frame, in order to accurately determine the position, velocity, and Navigation parameters such as time and attitude provide the basis; the pulse arrival time conversion model converts the inherent time of photons arriving at the spacecraft from the measurement of the on-board clock into the coordinate time (TCB) when the signal arrives at the barycenter of the solar system, so that the pulse profile and measurement can be extracted Pulse arrival time; large-scale space-time b...

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Abstract

The invention relates to a large-scale space-time and on-orbit dynamic effect simulation method which is characterized in that a spatial datum and a time datum are established to realize synchronization after building on that a large-scale space-time datum is defined under the theory of general relativity; by utilizing space-time datum relationship, photon pulse time received by a spacecraft is converted to a solar-system-centric coordinate system to be compared with photon pulse arrival time predicted by a pulsar timing model in a preset data base so as to obtain time delay from the spacecraft to solar system barycenter; pulsar characteristic parameter data and standard pulse contour data in the data base are called through a signal modulator to generate electric pulse contour simulation signal; and at the same time, the obtained time delay is loaded in signal for modulation and is output to an X-ray signal generator to realize simulation. According to the method, an X-ray photon signal transmission effect under a spatial scale and high dynamic environment can be simulated in a ground test verification system which has a limited space and is placed statically.

Description

technical field [0001] The invention belongs to the technical field of spacecraft autonomous navigation, and relates to a method for simulating large-scale space-time and on-orbit dynamic effects. Background technique [0002] Pulsars are very far away from the solar system. X-ray photons reach the spacecraft detector system after tens of thousands of years in the context of large-scale space-time. , and other various delay effects on X-ray pulsar navigation. In the X-ray pulsar navigation ground test system, through the large-scale space-time benchmark simulation method, the ground test environment with limited space and static placement can simulate the effect of approximating large-scale space and high dynamic X-ray photon signal transmission, which belongs to pulsar navigation The core technology of the ground test system. However, no complete design scheme or special discussion on large-scale spatio-temporal benchmark simulation has been retrieved so far. Therefore, ...

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Application Information

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IPC IPC(8): G01C21/24G01C25/00
Inventor 贝晓敏帅平吴耀军徐立宏
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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