Formation reconfiguration control method for underactuated spacecraft based on input saturation

Abstract

The invention provides a trace-direction underactuated spacecraft formation reconstruction control method facing input saturation. According to the method, a dynamic model is established to solve the problem in trace-direction underactuated spacecraft formation reconstruction control of a circular orbit with the input saturation effect. On the basis of the dynamic model, the system controllability and formation reconstruction feasibility under the condition that trace-direction control lacks are analyzed. An auxiliary system is constructed to solve the problem of input saturation by taking the model as a controlled object, and a backstepping control method is used to construct a closed-loop control law under the trace-direction underactuation condition. The method can be used to realize trace-direction underactuated spacecraft formation reconstruction control of the circular orbit with the input saturation, the closed-loop system is consistent and in bounded stable, and the robustness and dynamic performance for external perturbation and model errors are high.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an input saturation-oriented trajectory underactuated spacecraft formation reconfiguration control method. Background technique [0002] Spacecraft formation is a key technology for future space mission applications. The spacecraft formation distributes the different functional components of a traditional single spacecraft to other small spacecraft in the spacecraft formation, so that the space between the spacecraft formation can be realized. Coordinate with each other to complete the task. Therefore, compared with a single spacecraft, the spacecraft formation has higher mission flexibility and reliability, while reducing costs and risks. The task flexibility of the spacecraft formation is reflected in the fact that it can be transformed into different formation configurations through orbital maneuvering to realize formation reconfiguration to meet the needs of differ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an input saturation-oriented trace-to-underactuated spacecraft formation reconfiguration control method, which solves the input saturation problem that is not considered in the existing trace-to-underactuated spacecraft formation reconfiguration control methods

Images