Adaptive tracking fault tolerant controller design for uncertain nonlinear reactor recycle system with unknown time-varying delay in the presence of disturbance and loss of actuators effectiveness

This paper investigates Linear Matrix Inequality (LMI) based tracking robust adaptive Fault Tolerant Control (FTC) strategy for uncertain nonlinear chemical reactor recycle system (RRS) with unknown time-varying delay in the presence of disturbance and loss of actuator effectiveness. Without a prior knowledge about the system with time-varying delay or uncertainty, the controller method developed by using Lyapunov-Krasovskii stability theory. The proposed approach guarantee asymptotic stability of the closed-loop system by using an online adaptive tuning controller and attenuation of the disturbance and uncertainty effects are also achieved. The merit of the proposed scheme is verified by simulation where applied on real practical uncertain RRS in the presence of time-varying delay and disturbances.