A Prognostic Health Management Based Framework for Fault-Tolerant Control
نویسندگان
چکیده
This paper presents one approach in developing a PHM-based reconfigurable controls framework. A low-level reconfigurable controller is defined as a time-varying multi-objective criterion function and appropriate constraints to determine optimal set-point reconfiguration. A set of necessary conditions are established to ensure the stability and boundedness of the composite system. In addition, the error bounds corresponding to long-term state-space prediction are examined. From these error bounds, the point estimate and corresponding uncertainty boundaries for the remaining useful life (RUL) estimate are obtained. Finally, results are obtained for an avionics grade triplex-redundant electro-mechanical actuator (EMA) with a specific fault mode; insulation breakdown between winding turns in a brushless DC (BLDC) motor is used as a test case for the fault-mode.
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