Asteroid landing end bounce movement guidance method

Abstract

The invention discloses an asteroid landing end bounce movement guidance method, aiming at the bounce movement problem of an asteroid in an unascertained environment, wherein the asteroid landing end bounce movement guidance method is designed from the demands of reducing the bounce times and ensuring the bounce movement precision. The implementation method comprises the following steps: taking an attitude angle and an angular velocity at a lander collision point as control variables, and performing guidance in a manner of performing real-time trajectory planning in each bounce; in the bounce trajectory planning process, determining the bounce times according to the maximum distance and the minimum distance of single bounce; at each bounce collision point, dividing the moving process from the lander to the target point into an approaching section and a braking section, and planning a bounce track in a feedback correction mode in sequence, so that the lander can move near the target point, and the horizontal speed of the lander is eliminated; and acquiring the control quantity of the lander in the bounce through trajectory planning, eliminating the influence of parameter disturbance in the previous bounce and completing the robust guidance of the bounce moving trajectory. According to the method, the requirement for reducing the number of bounces and the influence of parameter disturbance on bounce movement are considered, and accurate bounce movement from the lander to the target point can be achieved.

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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