Robustness analysis method for spacecraft orbit control strategy

Abstract

The invention relates to robustness analysis method for a spacecraft orbit control strategy, and belongs to the technical field of the spacecraft orbit dynamics and control. The robustness analysis method comprises the following steps: modeling orbital motion of the spacecraft through a Gauss orbit element perturbation equation; analyzing the non-spherical perturbation of a low-orbit satellite and the atmospheric drag perturbation; designing an orbit maintaining strategy to execute the maintaining control to the spacecraft orbit elements; using a differential correcting algorithm to improve the precision of the orbit maintaining; building a position error, velocity error and engine thrust error model in the running process of the spacecraft; designing a calculation model of spacecraft control error mean, variance and error distribution proportion; and using a Monte Carlo simulation method to execute the simulation analysis to the spacecraft orbit control strategy with the error, and building a robustness evaluation system of the orbit control strategy. In the control strategy design, the actual situation of the satellite orbit control is considered adequately, and the feasibility of the method in the actual project is guaranteed under the precondition of simpliness and convenience and according with the actual situation.

Description

technical field [0001] The invention relates to a robustness analysis method for a spacecraft orbit control strategy, in particular to a spacecraft orbit control method and a control error evaluation system in the presence of random errors, and belongs to the field of spacecraft orbit dynamics and control. Background technique [0002] In an ideal perturbation-free environment, the spacecraft can obey the motion law of the Kepler orbit and carry out long-term stable orbital operation. However, in the real environment, there are inevitably various orbital perturbation factors, such as the earth's flattening perturbation, atmospheric perturbation, solar light pressure perturbation, sun and moon perturbation, etc., which cause the spacecraft to deviate from the predetermined orbit, so that the spacecraft is executed Related tasks, especially delicate ones, introduce deviations and inconveniences. Therefore, it is a necessary work to study the orbit keeping control of the long-...

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Problems solved by technology

The robustness analysis of the current orbit control strategy has a certain pertinence, and there is no robustness evaluation system for evaluating the satellite orbit control strategy from a systematic point of view. Therefore, the present invention aims to propose a robust To establish a robustness evaluation system for spacecraft orbit control strategy, so as to provide the basis and guarantee for the practical application of orbit control strategy

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