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Cost-guaranteed robust gain scheduling controller design method for spacecraft rendezvous system

A technology of gain scheduling and design method, applied in vehicle position/route/height control, attitude control, non-electric variable control, etc.

Active Publication Date: 2021-02-09
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0006] Aiming at the spacecraft circular orbit rendezvous system with actuator saturation and parameter uncertainty, the present invention designs a cost-guaranteed robust gain-scheduling controller based on low-gain feedback, gain-scheduling method and invariant ellipsoid set theory to solve Robust Control Problem of Spacecraft Circular Orbit Rendezvous System

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  • Cost-guaranteed robust gain scheduling controller design method for spacecraft rendezvous system
  • Cost-guaranteed robust gain scheduling controller design method for spacecraft rendezvous system
  • Cost-guaranteed robust gain scheduling controller design method for spacecraft rendezvous system

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Embodiment Construction

[0071] A method for designing a cost-guaranteed robust gain scheduling controller for a spacecraft rendezvous system, the method specifically includes the following steps:

[0072] Step 1: Establish a dynamic model, the specific process is as follows:

[0073] Step 1.1: Consider two adjacent spacecraft (the target spacecraft and the tracking spacecraft), the circular orbit radius of the target spacecraft is R, and the relative distance from the target spacecraft to the tracking spacecraft is r. Consider the orbital coordinate system O-XYZ of the target spacecraft, whose origin O is fixed on the center of mass of the target spacecraft, the X-axis is along the direction of the circular orbit radius R, the Y-axis is the direction in which the spacecraft is tracked, and the Z-axis is outside the orbital plane. Use μ=GM to represent the gravitational constant, where M is the mass of the central star, and G is the universal gravitational constant, then the orbital angular velocity o...

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Abstract

The invention relates to a guaranteed cost robust gain scheduling controller design method of a spacecraft rendezvous system. According to the method, spacecraft intersection is divided into in-planemotion and out-of-plane motion to be considered, and a dynamic model with saturated nonlinearity and parameter uncertainty is established. For a spacecraft circular orbit rendezvous system with actuator saturation and parameter uncertainty, a cost-guaranteed robust gain scheduling controller is designed based on low gain feedback, a gain scheduling method and a robust control theory. Compared withthe existing gain scheduling control, the cost-guaranteed robust gain scheduling controller provided by the invention considers the mutual restriction relationship between the dynamic performance andthe control cost of the system, and balances the dynamic performance and the control cost of the system by introducing a secondary performance index function.

Description

technical field [0001] The invention relates to a controller design method for a spacecraft rendezvous system, and designs an effective cost-guaranteed robust gain scheduling controller for a spacecraft circular orbit rendezvous system with actuator saturation and parameter uncertainty, and specifically relates to a A cost-guaranteed robust gain-scheduling controller design method for spacecraft rendezvous system. Background technique [0002] Spacecraft rendezvous is an important technology for accomplishing current and future space missions. Successful rendezvous and docking is a prerequisite for the completion of many space missions, such as maintenance, interception, docking, rescue, assembly of large structures, and satellite networking. In the past few decades, people have conducted active research on spacecraft rendezvous, and achieved many achievements in control theory and technology. Many advanced control theory methods have been used to solve the problem of space...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/0833Y02T90/00
Inventor 王茜杨悦涛张涵
Owner HANGZHOU DIANZI UNIV
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