Satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling

A satellite attitude control and fault-tolerant control technology, applied in attitude control and other directions, can solve problems such as inability to accurately estimate nonlinear interference, and achieve the effect of high stability

Inactive Publication Date: 2019-06-14
YANGZHOU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to propose a satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling, to solve the problem that the existing DOBC method cannot accurately estimate irregular nonlinear interference

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  • Satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling
  • Satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling
  • Satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling

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Embodiment Construction

[0038] Aiming at the multi-source interference of spacecraft, especially some irregular nonlinear interference, the present invention uses the T-S fuzzy model to model, overcomes the shortcomings of the existing DOBC method, and further integrates the interference observer, fault diagnosis observer, robust Combining the control algorithm and the convex optimization algorithm, a composite layered anti-interference fault-tolerant controller is designed, which provides a control method with feed-forward interference compensation and fault reconstruction to ensure that the system still has good robustness under the influence of multi-source interference. Stickiness and reliability.

[0039] The principle of the present invention is: the present invention models interference based on T-S fuzzy. First, the present invention introduces the T-S fuzzy model as a tool for approximating external disturbances, which can describe complex and irregular nonlinear disturbances, and then estim...

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Abstract

The invention provides a satellite attitude anti-interference fault-tolerant control method based on T-S fuzzy modeling. Firstly, performing modeling on the nonlinear vibration interference generatedby an orbiting satellite flywheel through a T-S fuzzy model, and constructing a T-S fuzzy interference observer to estimate and cancel the interference generated by the flywheel vibration; secondly, estimating time-varying actuator failures in the system through designing a fault diagnosis observer, and performing reconstitution in composite control; and finally, combining the T-S fuzzy interference observer, the fault diagnosis observer, a robust (the formula is as shown in the specification) state feedback controller and a convex optimization algorithm to construct a composite layered anti-interference fault-tolerant controller and solve a control gain and an observer gain, therefore, the control accuracy is improved on the basis of ensuring system safety and stability. The invention hasthe advantages of strong robustness to interference, high reliability, convenient design, and the like, and can be used for the attitude control system of a spacecraft or a satellite.

Description

technical field [0001] The invention belongs to spacecraft attitude control technology, in particular to a satellite attitude anti-interference and fault-tolerant control method based on T-S fuzzy modeling. Background technique [0002] Satellite is a complex system engineering involving communication technology, navigation and control, electronic circuit technology, thermodynamics, materials science, software technology and other fields. With the rapid development of modern aerospace technology, the scientific research tasks that satellites need to undertake are becoming more and more diverse, so the performance requirements for satellite attitude control systems are also getting higher and higher. The satellite attitude control system will inevitably be affected by the vibration of elastic accessories, modeling errors, measurement noise and other disturbances. In addition, when the satellite is in orbit, it is affected by the space environment of high vacuum and strong ra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
Inventor 曹松银杭斌裔扬
Owner YANGZHOU UNIV
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