Observed-Based Command Filter Control of Continuous Stirred Tank Reactor
Aiming at the problems of external disturbance and unmeasurable state existing in the practical applica-tion of continuous stirring reactor system,a fuzzy adaptive command filtering control strategy based on observer is de-signed.First,the fuzzy logic system is used to approximate the nonlinear functions existing in the system,and a fuzzy state observer is designed to estimate the state variables of the system in real-time.The disturbance observer accu-rately estimates the external disturbance of the system,and performs disturbance compensation during the design process of the backstepping method,which makes the design process of the controller simpler and solves the"compu-tation explosion"problem caused by the traditional backstepping method.The stability of the closed-loop system is proved by Lyapunov stability theory.MATLAB simulation results show that the designed control scheme has the ad-vantages of small steady-state error,high control precision,strong anti-interference ability,and can directly observe the system state variables.
Continuous stirred tank reactorDisturbance observerFuzzy controlFuzzy observerCommand filterBackstepping
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