Observer-based fuzzy adaptive control for a class of MIMO nonlinear systems

The adaptive fuzzy Control scheme based on high gain observer is proposed for a class of MIMO nonlinear systems involving plant uncertainties and external disturbances. It does not require the system states to be available for measurement. Assisted by observer-based state feedback control component, combining adaptive control, H_infin control with fuzzy logic systems, the output feedback control law and parameter adaptive law are derived. The system performance can be greatly improved. The simulation results demonstrate that the proposed adaptive fuzzy control system can guarantee the system stability and also maintain a good tracking performance