Autonomous astronomical navigation method of spark detector based on improved MMUPF filtering method

A Mars probe and celestial navigation technology, applied in the field of aerospace navigation, can solve the problems of low accuracy of filtering method and large amount of calculation

Active Publication Date: 2010-03-17
BEIHANG UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the disadvantages of low precision and large amount of calculation in the

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  • Autonomous astronomical navigation method of spark detector based on improved MMUPF filtering method
  • Autonomous astronomical navigation method of spark detector based on improved MMUPF filtering method
  • Autonomous astronomical navigation method of spark detector based on improved MMUPF filtering method

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Embodiment Construction

[0047] Such as figure 1 As shown, the present invention takes Mars probe as an example, and the specific implementation method is as follows:

[0048] Establish the state equation of the navigation system of the Mars rover on the transfer orbit based on the orbital dynamics.

[0049] According to the needs of the celestial navigation system, the four-body Singer model is adopted, which uses the first-order Singer model to model other perturbation items on the basis of the four-body model. The model (system state equation) in the heliocentric inertial coordinate system (J2000.0) can be expressed as:

[0050] r · · ps = - μ s r ps r ps 3 - μ m [ ...

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Abstract

An autonomous astronomical navigation method of a spark detector based on an improved MMUPF filtering method relates to an autonomous navigation method of a spark detector. The method comprises the following steps: accurately modeling a deep space detector positioned on a transfer orbit; then measuring with starlight angular distances as quantities; and finally, carrying out optimal estimation ofnavigation parameters by adopting the improved MMUPF filtering method, thereby solving the problem that the planet gravitation size and an orbit dynamics model are changed continuously when the distances are different, and obviously improving the navigation precision. The autonomous astronomical navigation method can be used for determining the navigation parameters of the spark detector or a planet detector positioned on the transfer orbit.

Description

technical field [0001] The present invention relates to the technical field of aerospace navigation, and can be used to accurately determine the navigation parameters of Mars probes or other probes orbiting planets, and in particular to a Mars probe autonomous astronomy system based on an improved MMUPF filtering method (improved multi-model UPF filtering method) The navigation method is suitable for the navigation and positioning of the deep space probe on the transfer orbit. Background technique [0002] When the planet probe is in its transfer orbit, the gravitational force of the sun and planets will change with its position. When it is far away from a planet, its gravitational force is negligible, but when it is close , the gravitational force of the planet will increase and have a greater impact on the orbital motion of the probe. Therefore, in the orbital motion of the planetary probe, its orbital dynamics model is not static, but changes continuously. [0003] Due t...

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Application Information

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IPC IPC(8): G01C21/20
Inventor 宁晓琳吴伟仁马辛
Owner BEIHANG UNIV
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