Control Method of Accompanying Satellite Avoidance Based on Mixed Integer Second-Order Cone

Abstract

The invention relates to a mixed integer second-order cone optimization-based concomitant satellite avoidance prediction control method. The method comprises the following steps: establishing a concomitant satellite motion prediction model, relating to search algorithm preprocessing, designing a nonlinear cost function, designing satellite maneuverability constraint, propeller constraint and avoidance constraint, converting nonlinear constraint as linear constraint and convex quadratic cone constraint, and performing online optimization solution by YALMIP algorithm and MOSEK algorithm solvers;a model prediction control (MPC) method based on a mixed integer second-order cone optimization iterative algorithm and variable weight is designed; energy consumption, motion time and calculation quantity in the satellite avoidance process can be reduced, and the method is suitable for route avoidance control of a spacecraft in the field of spacecraft control.

Description

technical field [0001] The invention relates to the technical field of spacecraft control, in particular to a predictive control method with satellite avoidance based on mixed integer second-order cone optimization, which is mainly applied to spacecraft path avoidance control. Background technique [0002] The space station has a huge structure and complex technology. Due to its long on-orbit operation period, astronauts need to inspect, monitor and maintain on-orbit. Therefore, the maintenance of the space station has become a new task in the aerospace field in recent years. The construction of the space station began in the 1970s. Thousands of failures occurred during the operation of the "Mir" space station. As a result, countries around the world have successively studied and explored the maintenance and development of the space station. At present, there are nano-satellites and accompanying satellites. launch, and complete tasks such as close-range detection, autonomous...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of predictive control method with satellite avoidance based on mixed integer second-order cone optimization, solve the problem of accompanying satellite maintenance space station and avoiding, in order to realize energy consumption is little, time For short multi-objective optimization tasks, through an optimization method combining model predictive control and mixed integer second-order cone-constrained nonlinear programming, a nonlinear cost function with real-time changes in weight coefficients is designed, thereby achieving the performance of multi-objective optimization , reduce the amount of online calculations and reduce energy consumption. In addition, an iterative solution method for second-order cone optimization is designed to allow the satellite to avoid obstacles and reach the target point safely and reliably.

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