Autonomous collision avoiding method capable of achieving optimal spacecraft energy under multiple constraints

Abstract

The invention provides an autonomous collision avoiding method capable of achieving optimal spacecraft energy under multiple constraints, relates to the aerospace field, and aims at effectively solving the satellite collision problem. The autonomous collision avoiding method comprises the steps that a satellite kinematic model is built; a coordinate transformation matrix is established, and motions of satellites in a center of mass coordinate system are mapped to motions in an earth inertial coordinate system; a collision avoiding strategy is made; state equations of the satellites are calculated under constraint conditions; a spacecraft energy optimization index and a Hamiltonian function are selected, and coordination factors are calculated; optimal velocity increments and directions ofthe satellites under the optimal spacecraft energy condition are calculated, and by means of the optimal velocity increments and directions of the satellites, motion trajectories of the satellites under the optimal condition are avoided to achieve collision avoiding. The autonomous collision avoiding method is high in control result precision and capable of achieving collision avoiding of two or more satellites, has the advantages of saving fuel, being simple in control operation and the like and is universally suitable for microsatellites and particularly suitable for close-range satellite collision avoiding.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to an autonomous collision avoidance method with optimal energy of a spacecraft under multiple constraints. Background technique [0002] Autonomous collision avoidance is an effective means and method to prevent low-orbit small satellites from colliding. Due to the rapid development of commercial small satellites, the number of small satellites has increased rapidly, increasing the risk factor of collisions, and the number of measurement and control stations is limited. If several satellites simultaneously Collisions are almost impossible to avoid while only passing through the ground. [0003] At present, the existing satellite autonomous collision avoidance methods mainly include the following methods: [0004] "Spacecraft On-orbit Anti-Collision Autonomous Avoidance Strategy" (Journal of National University of Defense Technology, Yao Dangnai, Wang Zhenguo, 2012, 6(34): 100-1...

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Problems solved by technology

[0008] In order to effectively solve the satellite collision problem, the present invention provide

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