A Novel Fuzzy Multiple Reference Model Adaptive Controller Design

This paper presents a novel Fuzzy Multiple Reference Model Adaptive Controller (FMRMAC) for systems that are multi modal in nature and show scheduled ‘Jumps’ in their operation. The proposed scheme incorporates a fuzzy logic switching method in the Model Reference Adaptive Control (MRAC) framework without any explicit identifier. The fuzzy switching scheme produces a ‘soft’ way of model generation, combining a group of weighted reference models effective at each modal operation. This approach can be performed online and is very well suited for applications that show sudden operational changes. Unlike static multiple model algorithms, or switching dynamic algorithms, this scheme provides interactive multiple model environment with soft switching. The scheme is effective, computationally feasible and fault tolerant in nature.