Simultaneous state and actuator fault estimation for satellite attitude control systems
| Autor: | Yuqing Li, Rixin Wang, Minqiang Xu, Cheng Yao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0209 industrial biotechnology
Engineering Observer (quantum physics) Augmented state observer Stability (learning theory) Aerospace Engineering 02 engineering and technology Actuator fault estimation Fault (power engineering) 01 natural sciences 020901 industrial engineering & automation Control theory 0103 physical sciences Convergence (routing) State observer 010301 acoustics Fault diagnosis Motor vehicles. Aeronautics. Astronautics business.industry Mechanical Engineering TL1-4050 Lipschitz nonlinear system Satellite attitude control system Nonlinear system Piecewise Actuator business |
| Zdroj: | Chinese Journal of Aeronautics, Vol 29, Iss 3, Pp 714-721 (2016) |
| ISSN: | 1000-9361 |
| DOI: | 10.1016/j.cja.2016.04.010 |
| Popis: | In this paper, a new nonlinear augmented observer is proposed and applied to satellite attitude control systems. The observer can estimate system state and actuator fault simultaneously. It can enhance the performances of rapidly-varying faults estimation. Only original system matrices are adopted in the parameter design. The considered faults can be unbounded, and the proposed augmented observer can estimate a large class of faults. Systems without disturbances and the fault whose finite times derivatives are zero piecewise are initially considered, followed by a discussion of a general situation where the system is subject to disturbances and the finite times derivatives of the faults are not null but bounded. For the considered nonlinear system, convergence conditions of the observer are provided and the stability analysis is performed using Lyapunov direct method. Then a feasible algorithm is explored to compute the observer parameters using linear matrix inequalities (LMIs). Finally, the effectiveness of the proposed approach is illustrated by considering an example of a closed-loop satellite attitude control system. The simulation results show satisfactory performance in estimating states and actuator faults. It also shows that multiple faults can be estimated successfully. |
| Databáze: | OpenAIRE |
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