Formation reconfiguration control method for radially underactuated spacecraft based on input saturation

Abstract

The invention provides an input saturation oriented radial under-actuated spacecraft formation reconfiguration control method. The method establishes a kinetic model for the problem about circular orbit radial under-actuated spacecraft formation reconfiguration control having an input saturation effect. Based on the kinetic model, the system controllability and the formation reconfiguration feasibility under the condition that radial control loses are analyzed. An auxiliary system is constructed by using the model as a controlled object to solve the problem of input saturation, and meanwhile, a closed-loop control law under the radial under-actuated condition is constructed by adopting a back-stepping control method. The method can accomplish circular orbit radial under-actuated spacecraft formation reconfiguration control having input saturation, and the closed-loop system is consistent, finally has bounded stability and has good robustness and dynamic performance on external perturbation and model error.

Description

technical field

[0001] The invention relates to the technical field of automatic control, in particular to an input saturation-oriented radial underactuated spacecraft formation reconfiguration control method. Background technique

[0002] Spacecraft formation is a key technology for future space mission applications. Spacecraft formation distributes the different functional components of a traditional single spacecraft to other small spacecraft in the spacecraft formation, so that the spacecraft formation can realize mutual Coordinate and unify 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 different space missions. Therefore...

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