Attachment motion parameter calculation method of flexible rope net in asteroid gravitational field

Abstract

The invention provides an attachment motion parameter calculation method of a flexible rope net in an asteroid gravitational field, and belongs to the field of asteroid detection. The method comprisesthe following steps: firstly, establishing a mechanical model of a flexible rope net in an asteroid body coordinate system; respectively establishing an asteroid gravitational field model and a surface model; performing collision detection on the flexible rope net and the asteroid, calculating normal collision force and friction force of nodes of the flexible rope net, finally establishing a dynamic model of the flexible rope net in an asteroid gravitational field, and calculating to obtain attachment motion parameters of the flexible rope net in the asteroid gravitational field. By utilizingthe method, the problems of rebound escape and overturning out-of-control of the detector caused by the problems of insufficient star catalogue information, complex landing terrain and the like in anasteroid weak gravitational field attachment task can be solved.

Description

technical field [0001] The invention proposes a method for calculating the attachment motion parameters of a flexible rope net in an asteroid gravitational field, which belongs to the field of asteroid detection. Background technique [0002] In recent years, many countries have launched close-range detection missions to different asteroids, and the dynamics research of asteroid probes has gradually become a hot issue in the field of aerospace dynamics. However, in practical problems, due to the weak and extremely irregular gravitational force of the target asteroid, the probe is very likely to fail to land due to the excessive bounce speed during the landing process. Further considering that the local topography of the surface of the asteroid is complex, and human beings have insufficient observation information on the asteroid's topography, the probe is prone to overturning when it lands on the surface of the asteroid, resulting in loss of control over it, which will also ...

AI Technical Summary

Problems solved by technology

The invention can solve the time-dependent changes of the displacement vector and the velocity vector of the flexible rope net in the gravitational field of the asteroid, and can overcome problems caused by insufficient star list information and complex landing terrain in the asteroid weak gravitational field attachment task. The problem of rebound escape and overturning out of control of the probe

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