A fault-tolerant control method for constellation-level satellites based on nonlinear programming

Abstract

The invention relates to a clustering-grade satellite fault tolerance control method. A proper and effective satellite formation fault tolerance control strategy is designed for a deep space detectionsystem based on the minimal satellite formation technology, so the formation satellite is capable of adjusting the formation types by use of the nonlinear dynamic planning technology in case of a failure so as to continue to finish task requirements. According to the invention, based on the clustering-grade satellite fault tolerance control method, after the satellite fails in a formation process, by determining initial and termination positions of the fault satellite and a standby satellite, considering inter-satellite collision and time constraints, and taking the fuel consumption as a performance index, by use of the Gauss pseudo-spectral method, the optimal leaving and entering positions of the fault satellite and the standby satellite are determined and respective optimal track plansare acquired, so it is ensured that the position of the fault satellite can be completely filled through the entering the standby satellite, and the standby satellite and the healthy satellites forma new formation, thereby achieving performance requirements of the formation. The method is mainly applied in clustering-grade satellite fault tolerance control occasions.

Description

technical field [0001] The invention relates to a fault-tolerant control method for cluster-level satellites based on nonlinear programming, which is mainly applied to the process of formation and formation reconstruction when formation satellites fail when they are working in orbit, and belongs to the field of aerospace satellite formation control. Specifically, it involves a cluster-level satellite fault-tolerant control method based on nonlinear programming. Background technique [0002] In recent years, with the continuous complexity of space mission requirements, traditional single satellites are far from meeting the mission requirements. The vigorous development of microsatellite technology has made multiple satellites form a formation to work together to complete complex tasks and goals, which has become the mainstream direction of space technology development. Multi-satellite formation flight means that multiple satellites maintain a spatial configuration that chang...

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Problems solved by technology

Aiming at the problem of satellite faults in deep space exploration tasks based on satellite formations, the present invention proposes a new satellite formation fault-tolerant strategy, studies the trajectory planning of faulty satellites leaving formations and backup satellites entering formations during formation reconfiguration maneuvers, and realizes fault-free The reconstruction of the entire satellite formation configuration is universal for satellite formations of any configuration. It is a useful exploration for the use of micro-satellite formations to realize deep space exploration technology, and at the same time provides a solution for high-precision flight of micro-satellite formations under satellite failures. new ideas

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