Method for selecting autonomous navigation signposts of deep space probe based on observing matrix

A deep space detector and observation matrix technology, applied in the direction of integrated navigator, etc., can solve the problem of no navigation road sign independent selection method and so on

Inactive Publication Date: 2012-01-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] In order to solve the problem that the current deep-space detector based on landmark navigation does not have an accurate and feasible method for autonomously selecting navigation landmarks, the present invention proposes a navigatio

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  • Method for selecting autonomous navigation signposts of deep space probe based on observing matrix
  • Method for selecting autonomous navigation signposts of deep space probe based on observing matrix
  • Method for selecting autonomous navigation signposts of deep space probe based on observing matrix

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[0031] In order to better illustrate the purpose and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] When the deep space probe is near the target celestial body, it uses an optical camera to take images of the surface of the target celestial body, extracts landmarks with obvious terrain features such as rocks and craters, and uses them as reference points for the autonomous navigation of the deep space probe. The position and attitude of the deep space probe relative to the target celestial body can be determined by using the information of the three landmark points. Therefore, in order to simplify the actual engineering algorithm and reduce the calculation time of the spaceborne aircraft occupied by the algorithm, three navigation algorithms are used in the navigation algorithm. Landmarks are used for autonomous navigation of deep control detectors. Sinc...

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Abstract

The invention relates to a method for selecting autonomous navigation signposts of a deep space probe based on an observing matrix, which is particularly suitable for a navigation system for carrying out autonomous confirmation on the position and the posture of a deep space probe by utilizing three signposts and belongs to the field of autonomous navigation. By reading the position data of navigation signposts in a target celestial body coordinate system, position vectors of n signposts relative to the probe in the target celestial body coordinate system are calculated; by calculating a row vector of the observing matrix, an observing matrix H is obtained; the sum of characteristic values of a matrix (HHT)-1 corresponding to the combination of any three navigation signposts is calculated, and the three optimal navigation signposts are selected. The method for selecting autonomous navigation signposts of a deep space probe based on the observing matrix has high precision, less calculation and feasible analysis; and the invention provides a clear and feasible method for selecting the navigation signposts for the deep space exploration of target celestial body flight.

Description

technical field [0001] The invention relates to an observation matrix-based method for selecting navigation landmarks for deep-space probes, which is particularly suitable for a navigation system that uses three landmarks to independently determine the position and attitude of deep-space probes, and belongs to the field of autonomous navigation. Background technique [0002] Flying near the target celestial body will be one of the most complex tasks in deep space exploration in the future. Due to communication delays and the complexity of the dynamic environment in deep space, the traditional navigation and control modes based on ground remote control can no longer meet the needs of high-precision detection. , which requires the detector to have autonomous navigation function. Due to the constant deviation and drift of the inertial measurement unit, the navigation accuracy is low. At the same time, with the development of optical sensors such as navigation cameras, the auton...

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Application Information

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IPC IPC(8): G01C21/24
Inventor 崔平远朱圣英徐瑞乔栋尚海滨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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