Ứng dụng điều khiển trượt và kỹ thuật cuốn chiếu Hệ thống bồn kép

Abstract

This research presents a method to design a liquid level track csontroller for a coupled-tank system based on sliding mode control (SMC) approach and sliding mode control combined with a backstepping techniques (BSMC). The sliding mode controller is known as robust nonlinear controller to reject uncertainty and perturbation. The backstepping method breaks the problem of controlling complex higher order systems into a sequence of lower order control problems through a recursive procedure. The stability of the control system is proved by the Lyapunov theory. Simulation results in MATLAB/Simulink show the efficiency, suitability and robustness of the proposed control method compared with the traditional PID controller with the rising time, the settling time, the percent overshoot, the steady state error of the sliding mode controller and the backstepping techniques are 12.4(s), 23.2(s), 0(%), 0(cm); 11.23(s), 20(s), 0(%), 0(cm), respectively.