| A Study on the robust fault diagnosis and fault tolerant control method for the closed-loop control systems |
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Jong-Hyo Lee, Joon Lyou |
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| 폐회로 제어시스템의 강인한 고장진단 및 고장허용제어 기법 연구 |
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이종효, 유준 |
1국방과학연구소
2충남대학교 전자공학과 |
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| Abstract |
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This paper presents a robust fault diagnosis and fault tolerant control method for the control systems in closed-loop affected by unknown inputs or disturbances. The fault diagnostic scheme is based on the disturbance-decoupled state estimation using a 2-stage state observer for state, actuator bias and sensor bias. The estimated bias show the occurrence time, location and type of the faults directly. The estimated state is used for state feedback to achieve fault tolerant control against the faults. Simulation results show that the method has definite fault tolerant ability against actuator and sensor faults, moreover, the faults can be detected on-line, isolated and estimated simultaneously. |
| Key Words:
fault diagnosis, fault tolerant control, unknown inputs, disturbance-decoupled, 2-stage state observer |
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