Fault-tolerant control of flexible satellite with infinite-dimensional model

Ashayeri, Leila; Doustmohammadi, Ali; Saberi, Farhad Fani

doi:10.1016/j.asr.2021.03.006

Cited by 3 publications

(2 citation statements)

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“…On the basis of above tracking errors, some controllers can be designed to achieve the attitude pointing stability and tracking control, such as classical proportional–integral‐derivative control, sliding mode control [4, 6, 21], and adaptive control [37].…”

Section: Problem Formulationmentioning

confidence: 99%

“…Reviewing the existing study [1–3], fault estimation and fault tolerant control techniques are effective methods to cope with the unknown actuator faults and enhances the system reliability and maintainability. Different from rigid spacecraft, the intricate and strong coupling characteristics between the rigid and flexible modes will increase the complexity and difficulty in the achievements of accurate fault reconstruction and stable attitude control system [4–6]. However, to the best of the authors' knowledge, none of the existing traditional methods considers the estimation of actuator faults and vibration modes simultaneously in the flexible spacecraft attitude system.…”

Section: Introductionmentioning

confidence: 99%

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Fuzzy model based fault estimation and fault tolerant control for flexible spacecraft with unmeasurable vibration modes

Chang

2022

IET Control Theory & Appl

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This paper investigates the problem of anti‐disturbance fault estimation and attitude tracking fault tolerant control for a flexible spacecraft subject to actuator faults, external disturbances, input saturation, and configuration misalignment. Different form the traditional methods, both the nonlinear dynamics subsystem and attitude control system are reconstructed into Takagi–Sugeno fuzzy models, where partial nonlinear term is remained to assist the design of fuzzy controller. A fuzzy fault estimation observer with proportional–integral adaptive laws is first designed. Without measuring any dynamic information of flexible appendages, estimated values of unknown actuator faults and vibration disturbances of flexible appendages can be obtained simultaneously. This is the most important advantage of the proposed fault estimation scheme over the previous methods. Then, a fuzzy sliding mode fault tolerant control scheme, based on fewer fuzzy rules and less computational burden, is developed under the framework of feedback linearisation and feedforward compensation. The actuator faults and vibration disturbances are counteracted in real time. Regional pole placement and virtual controller with input saturation are adopted to tune the control input and avoid the radical control torque scheduling. Finally, numerical simulations are given to illustrate the validity of the proposed fault estimation and fault tolerant control strategies.

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Section: Problem Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%