A method for active control of surface attachment motion of small celestial bodies

Abstract

The invention relates to an active control method for an adhesion motion on a small celestial body surface, and belongs to the field of aerospace and aviation. An object of the invention is to solve the problem that a traditional small celestial body surface detector cannot achieve a fixed-point movement. In the method, an initial state of a detector is that the detector is attached to the small celestial body surface, and the detector moves to a target point in a bouncing manner. A plurality of intermediate path points are disposed between an initial point and the target point, and a guidance algorithm is designed, so the detector finally arrives at the target point along the intermediate path points. An actual flight trajectory of the detector deviates from a nominal trajectory due to an influence of an irregular weak attractive force, so, in a free flight process, a trajectory correction speed pulse [delta]v is applied, and then the detector can finally arrives at the target point along the intermediate path points. A reverse speed pulse is finally applied so that the detector stays at the target point and then a science investigation task is completed. Fixed-point detection of the detector on the small celestial body surface can be achieved, the complexity of configuration design is reduced, an execution mechanism does not need to be specially designed, and drive can be completed only by utilizing a pulse engine.

Description

technical field [0001] The invention relates to an active control method for the surface attachment motion of a small celestial body, which belongs to the field of aerospace. Background technique [0002] Small celestial bodies are a class of celestial bodies with extremely high detection value in the space environment. Attachment detection is an important means to improve human cognition of small celestial bodies. Compared with large planetary celestial bodies, small celestial bodies have the characteristics of light weight and irregular shape, which leads to an irregular and weak gravitational field near them. In this gravitational field environment, small celestial body surface probes are usually designed to move in the form of bouncing. In order to be able to successfully complete scientific investigation tasks, the detector needs to have a high autonomous movement ability on the surface of small celestial bodies, so as to realize the task of fixed-point detection, car...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the problem that the traditional small celestial body surface detector has low control precision and cannot realize fixed-point movement, and proposes an active control method for small celestial body surface attachment movement

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