Observer Based Tracking Control for the Isothermal CSTR

In this paper, an observer based state feedback control using Parallel Distributed Compensation (PDC) structure has been used to ensure the stability and trajectory tracking for the isothermal CSTR. Continuous Stirred Tank Reactors (CSTRs) are the most important element in the chemical industry. They are characterized by their complexity and nonlinearity. In this study, the Takagi-Sugeno (T-S) approach is proposed to simplify the nonlinear model of CSTR. However, in real-world control problems, the states may not be measurable, so, an observer is designed in order to estimate the immeasurable states and a tracking control is constructed based on the estimated states. An integral action is used to track a reference trajectory. The simulation results show a high precision tracking control.