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An Adaptive Real-Time Mars System Ephemeris Calculation Method

A calculation method and self-adaptive technology, which can be applied in directions such as integrated navigators, and can solve problems such as the inability to transplant numerical ephemeris algorithms.

Active Publication Date: 2021-06-29
SHANGHAI AEROSPACE CONTROL TECH INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of storage resources on the detector, the limitation of computing power and the influence of the space environment, these numerical ephemeris algorithms cannot be directly transplanted to the detector

Method used

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  • An Adaptive Real-Time Mars System Ephemeris Calculation Method
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  • An Adaptive Real-Time Mars System Ephemeris Calculation Method

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Embodiment Construction

[0029] The invention provides an adaptive real-time Mars system ephemeris calculation method for Mars probes, which can automatically select a suitable ephemeris calculation method according to the required accuracy, determine the calculation scheme on the device, and realize the Mars system under a limited amount of calculation. Reliable output of ephemeris data.

[0030] Such as figure 1 Shown, the adaptive Mars ephemeris calculation method of the present invention, its steps are as follows:

[0031] Step 1: The practicability P of each ephemeris calculation method on the real-time evaluator, and determine the ephemeris calculation method according to the P value.

[0032] In the first step, the value of the uniform algorithm executable parameter P is determined independently according to the validity of the data stored on the device.

[0033] There are two optional ephemeris calculation methods on the detector, fitting method and interpolation method. The fitting method ...

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Abstract

The invention discloses an adaptive real-time Mars system ephemeris calculation method for a Mars probe. The implementability P of each ephemeris calculation method on the real-time evaluator of this method determines the ephemeris calculation method according to the P value; at the same time, according to the required ephemeris calculation accuracy A, the minimum order used in the ephemeris calculation method is automatically set: finally , using the ephemeris calculation method of the minimum order to calculate the ephemeris value of the Mars system and output it. The effect is that the method can effectively determine the feasible minimum order ephemeris calculation method. On the premise of ensuring the ephemeris calculation accuracy A, it not only ensures the reliability of the algorithm on the device, but also reduces the requirement of the calculation amount on the device.

Description

technical field [0001] The invention relates to a Mars ephemeris calculation method for a deep space probe, in particular to an adaptive real-time Mars system ephemeris calculation method. Background technique [0002] When the Mars rover flies near Mars, it needs to independently carry out tasks such as real-time orbit calculation of the rover and establishment of a fire attitude. Therefore, it is necessary to have the ability to calculate the position and velocity (ephemeris) of Mars and its satellites in real time on the probe. Commonly used numerical ephemeris algorithms include fitting method and interpolation method. Due to the limitations of storage resources, computing power and space environment on the detector, these numerical ephemeris algorithms cannot be directly transplanted to the detector. Therefore, it is necessary to optimize and simplify these numerical ephemeris algorithms on the premise of meeting the requirements of the detector's ephemeris calculatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 刘宇谭晓宇冯建军聂钦博王卫华陆丹萍
Owner SHANGHAI AEROSPACE CONTROL TECH INST