Diagnostic Decision Using Recurrent Neural Networks

Abstract This contribution presents the results of an electrical motor on-line diagnosis. The implementation of a dynamic diagnostic decision is interesting in the case of closed-loop systems for which the residual responses may be transient. A neural network classifier is developed to diagnose the sensor and the actuator faults from some residuals. Simulation results are presented to show the detection and isolation ability. The classifier has been designed to cope with transient behaviours of the residuals generated by abrupt faults. The robustness with respect to unknown input (torque disturbance) and the sensitivity with respect to drift faults are experimented.