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

An asteroid and lander technology, applied in the field of deep space exploration, to achieve the effect of eliminating parameter disturbance

Active Publication Date: 2022-02-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0067] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with an embodiment and corresponding drawings.

[0068] The mass m of the lander is 3kg, and the gravitational acceleration g of the asteroid is 0.001m / s 2 , the surface friction coefficient of the asteroid is 0.45, the surface restitution coefficient is 0.5, the moment of inertia I of the lander is 0.04kg·m, the side length 2l of the lander is 0.4m, the initial position of the lander is (0,0.283), and the initial horizontal velocity is 0.2m / s, the initial vertical velocity is -0.2m / s, and the horizontal position of the target point is x t 50m.

[0069] Such as figure 1 As shown, the specific implementation steps of the bouncing mobile guidance method at the end of the asteroid landing stage disclosed by the present invention are as follows:

[0070] Step 1. Establish the functional relationship between the att...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08
CPCG05D1/0833
Inventor 梁子璇吕畅崔平远朱圣英徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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