Model-based fault-adaptive control of complex dynamic systems

Complex control applications require capabilities for accommodating faults in the controlled plant. Fault accommodation involves the detection and isolation of faults, and then taking appropriate control actions to mitigate the fault effects and maintain control. This requires the integration of fault diagnostics with control in a feedback loop. This paper discusses a generic framework for building fault-adaptive control systems using a model-based approach, with special emphasis on the modeling schemes that describe different aspects of the system at different levels of abstraction and granularity. The concepts are illustrated by a fault adaptive notional fuel system control example.