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

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...

AI Technical Summary

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 navigation system for autonomously determining the position and attitude of deep-space detectors using pixel information of three landmarks. A method for selecting landmarks for autonomous navigation of deep space probes based on observation matrix

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