A Bounce Movement Guidance Method in the Final Stage of Asteroid Landing

Abstract

The bouncing movement guidance method at the end of the asteroid landing stage disclosed by the present invention aims at the problem of bouncing movement in the uncertain environment of the asteroid, starting from the requirement of reducing the number of bouncing times and ensuring the accuracy of the bouncing movement, and designing a bouncing movement at the end stage of the asteroid landing guidance method. The implementation method of the present invention is as follows: taking the attitude angle and angular velocity at the collision point of the lander as the control amount, and performing guidance by means of real-time trajectory planning for each bounce; The number of bounces; at each bounce collision point, the movement process of the lander to the target point is divided into an approach segment and a braking segment, and the bounce trajectory is planned through feedback correction in turn, so that the lander can move to the vicinity of the target point and Eliminate its horizontal velocity; obtain the control amount of the lander in this bounce by trajectory planning, eliminate the influence of parameter disturbance in the last bounce, and realize the robust guidance of the bounce trajectory. This method considers the need to reduce the number of bounces and the influence of parameter disturbance on the bounce motion, and can realize the precise bounce movement of the lander to the target point.

Description

technical field [0001] The invention relates to a bouncing movement guidance method, in particular to a bouncing movement guidance method at the end stage of asteroid landing, and belongs to the technical field of deep space exploration. Background technique [0002] Asteroid detection has gradually become a hot spot in the aerospace field. In order to obtain accurate data on asteroids and exploit their resources, surface landing exploration is required. At the end of the landing stage that is about to touch the surface of the asteroid, if the lander deviates from the predetermined target position, it needs to move on the surface of the asteroid. In the physical environment with weak gravity of asteroids, the bouncing movement method is usually used, and the contact force between the lander and the surface is used for bouncing movement. In the final stage of landing, if the collision angle between the lander and the surface of the asteroid can be reasonably controlled, not...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a bouncing movement guidance method for the final stage of asteroid landing from the perspective of reducing the number of bouncing times and ensuring the accuracy of bouncing movement for the problem of bouncing movement in an uncertain environment for asteroids; The single bounce distance and number of bounces are considered in the process, and the bounce distance coefficient is introduced to adjust the end position after multiple bounces, and the precise bounce movement of the lander to the target point is realized through real-time trajectory planning

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