Simultaneous time-varying actuator and sensor fault reconstruction based on PI observer for LPV systems. (English) Zbl 1330.93048
Summary: We consider problems of actuator and sensor fault reconstruction simultaneously for linear parameter varying systems expressed in polytopic forms. By extending the sensor fault as an auxiliary state, a polytopic unknown input proportional-integral observer in which the actuator fault signals are assumed to be time varying is developed to estimate the system states and the actuator and sensor fault at the same time. The existence conditions of the observer are derived in terms of linear matrix inequalities that can be readily handled via some efficient tools. An example is given to demonstrate the advantages of the proposed method in comparison to the existing results.
MSC:
| 93B07 | Observability |
| 93C05 | Linear systems in control theory |
| 93B35 | Sensitivity (robustness) |
| 93C15 | Control/observation systems governed by ordinary differential equations |
Keywords:
proportional-integral observer; fault reconstruction; linear parameter varying (LPV) system; linear matrix inequalities (LMIs)Software:
ADDSAFEReferences:
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