Actuator fault detection and accommodation in distributed parameter systems

This paper presents a general framework for model-based fault detection and accommodation for a class of distributed parameter systems with control actuator faults. A set of dedicated observers, each with its own time-varying threshold is constructed to detect the occurrence of fault in the corresponding actuator and reduce fault detection time. Additionally, an adaptive diagnostic observer is then designed and analyzed to estimate each individual actuator fault. Based on the online approximation of fault parameter, automated control reconfiguration architecture is developed to accommodate actuator fault and to preserve close-loop stability. An example is discussed using the propose scheme to demonstrate effectiveness of the method. © Mu and Cui.