MULTIPLE HYPOTHESIS-TESTING APPROACH TO FDI FOR THE INDUSTRIAL ACTUATOR BENCHMARK

Detection of current faults in a D.C. motor with unknown load torques may not be feasible with linear methods and threshold logic. This pape r suggests an FDI scheme with a bank of observers where a nonlinear ob server is designed using the structure of the current fault. Multiple- hypothesis testing of the observer residuals is applied to discriminat e between faults and unknown input. The strategy has been applied to a simulation of the diesel engine actuator benchmark problem with an en couraging progress on performance compared to other results.