Observer-Based Adaptive Fuzzy Control of Nonlinear Non-strict Feedback System with Input Delay

This paper investigates the adaptive fuzzy output feedback control problem for nonlinear non-strict feedback system with input delay. In the control design, the Pade approximation method and fuzzy logic system are used to handle the input delay and unknown functions, and a state observer is designed to approximate the unmeasured states of the system. By backstepping technique, an observer-based adaptive fuzzy control design method is given. The stability of the controlled system and the tracking performance of the system are demonstrated by utilizing the Lyapunov function theory. Finally, a simulation example of electromechanical system is provided to confirm the effectiveness of the proposed control method.