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Mars probe on-board quick and high-precision determination method

A Mars probe, technology for determining methods, applied in navigation computing tools, etc.

Inactive Publication Date: 2011-07-06
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The orbit characteristics of the Mars rover are completely different, but there are few relevant literature records. Therefore, to establish a high-precision orbit extrapolation algorithm for the Mars rover, we can only gradually establish a set of algorithms based on the dynamic model of the earth satellite.

Method used

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  • Mars probe on-board quick and high-precision determination method

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Embodiment Construction

[0059] The present invention is described in detail below:

[0060] A fast and high-precision determination method on a Mars probe, which mainly includes the following steps:

[0061] (1) Establish a coordinate system;

[0062] (2) Clarify the conversion relationship of each coordinate system;

[0063] (3) Calculate the perturbation force;

[0064] (4) Integrate the orbital dynamics model in the Mars J2000 inertial system to obtain the orbit at time t.

[0065] Each step of the present invention is described in detail below in conjunction with example:

[0066](1) Establish a coordinate system

[0067] a. Earth J2000.0 inertial coordinate system (S ECI )

[0068] The origin of the coordinates is located at the center of mass of the earth, the reference plane is the flat equatorial plane of J2000 (January 1, 2000, 12:00:00 JED=2451545.0), the X-axis points from the center of the earth to the equinox of J2000, and the Z-axis is perpendicular to the reference plane , point...

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Abstract

The invention belongs to an on-board high-precision extrapolation algorithm of a Mars probe, and particularly relates to the extrapolation for an on-board high-precision rail of the Mars probe, which is used for forecasting the rail of the probe and the position and the speed of the probe relative to the Mars in real time. The method has the advantages that: no Mars probe is emitted in China, and no relative report about the on-board algorithm is provided, so the algorithm aiming at the on-board rail extrapolation of the Mars probe meets the requirement of engineering practice and keeps higher precision.

Description

technical field [0001] The invention belongs to an on-board high-precision extrapolation algorithm of a Mars probe orbit, in particular to a high-precision orbit extrapolation algorithm used on a Mars probe, and real-time forecasting of the orbit of the probe and its position and speed relative to Mars. Background technique [0002] Mars exploration is another milestone in my country's aerospace industry after the lunar exploration program. The braking near the fire point of the Mars rover and the high-precision determination of the attitude around the fire segment both require high-precision real-time orbit information, so the high-precision orbit extrapolation algorithm on the Mars rover is an essential function of the Mars rover. Although there are precedents for Mars probes abroad, due to technical confidentiality reasons, it is necessary to develop a set of high-precision orbit extrapolation algorithms suitable for Mars probes. Providing technical support for the Mars e...

Claims

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Application Information

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IPC IPC(8): G01C21/20
Inventor 李克行黄翔宇王大轶张晓文
Owner BEIJING INST OF CONTROL ENG
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