Hybrid Model Reference Adaptive Fuzzy Controller

This paper describes a hybrid controller combining a Model Reference Fuzzy Controller (MRFC) and Simple fuzzy logic control (FLC) for vector controlled permanent magnet synchronous motor (PMSM) is described. First, an MRFC system is designed to allow the plant states to follow the states produced by a reference model. The input to fuzzy controller is model error, which is the error between reference model and plant output. In the nominal conditions, the model following is perfect and the adaptive mechanism based on the fuzzy logic is idle. Secondly, when parameter variations or external disturbances occur, an augmented signal will be generated by Simple FLC mechanism to preserve the desired model following control performance. The effectiveness and robustness of the proposed controller is demonstrated by simulation results and quadratic performance criteria.