Method for autonomously navigating Mars probes
A Mars probe and autonomous navigation technology, applied in astronomical navigation, integrated navigator, etc., can solve the problem of inability to obtain a navigation solution that meets the navigation accuracy requirements, the number of navigation asteroids does not necessarily meet the mission requirements, and the asteroid ephemeris information has large errors and other problems, to achieve the effect of improving navigation ability, novel method and simple principle
Inactive Publication Date: 2016-06-29
SHANGHAI SATELLITE ENG INST
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Problems solved by technology
However, for Mars exploration missions, due to the limited number of near-Earth asteroids and the constraints of observation screening criteria, the number of available navigation asteroids may not meet the mission requirements
In addition, the asteroid ephemeris information obtained by ground station observations has large errors, so it is impossible to obtain a navigation scheme that meets the navigation accuracy requirements
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[0030] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0031] The basic principle of this method is: the spacecraft relies on its own sun sensor and Mars sensor to receive the optical image signals of the sun and Mars, and calculates the celestial line-of-sight vector parameters according to the image processing algorithm. Information, to obtain the velocity parameters of the spacecraft, and then obtain the position parameters of the spacecraft through integration.
[0032] Such as figure 1 Shown is the schematic diagram of the astronomical autonomou...
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The invention provides a method for autonomously navigating Mars probes. The method includes respectively selecting a combination of the sun and the earth and a combination of the sun and the Mars according to positional relations of the probes in the solar system; acquiring angle information; estimating navigation parameters such as positions and speeds by means of extended Kalman filtering. The combination of the sun and the earth and the combination of the sun and the Mars are used as observation objects. The method has the advantages that principles are simple, the method has low requirements on system resources and is a novel method for autonomously celestially navigating the Mars probes, means for navigating the probes can be expanded, the navigation capacity can be improved, and the method can be directly applied to tasks for autonomously navigating future Mars exploration in China and has a broad application prospect in the field of deep-space exploration.
Description
technical field [0001] The invention relates to the technical field of celestial navigation in the Mars exploration cruising segment, and in particular, to an autonomous navigation method for a Mars probe. Background technique [0002] The Mars probe has the characteristics of long flight distance, many unknown factors in the flight environment, complex flight procedures, and large communication delay and loss in the interplanetary space, which puts forward higher requirements for autonomous navigation capabilities. [0003] At present, the commonly used autonomous navigation methods are mainly based on asteroid or Mars optical navigation. However, for Mars exploration missions, due to the limited number of near-Earth asteroids and the constraints of observation screening criteria, the number of available navigation asteroids may not meet the mission requirements. In addition, the asteroid ephemeris information obtained by ground station observations has large errors, so it...
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Login to View More IPC IPC(8): G01C21/24
CPCG01C21/24G01C21/02
Inventor 张伟陈晓尤伟黄庆龙
Owner SHANGHAI SATELLITE ENG INST