STATE FEEDBACK CONTROL OF OUPLED-TANK LEVEL SYSTEM BASED ON PO LE-PLACEMENT

Gao Xingquan, Wang Zishuo, Wang Zimo

ABSTRACT:A state feedback control strategy for Coupled-tank level system based on Pole-Placement is presented in this paper. First, the operation point is determined when given the desired the controlled level of the lower tank according to the established nonlinear differential equations of coupled-tank system. Then, the linear state space model is obtained by using Taylor first-order expansion method and state definitions. Finally, the gain matrix of the state feedback controller is derived by placing the poles of the closed-loop system at the desired placements. The simulation results show that the designed closed-loop control system has better dynamic and steady-state performance.

Keywords:Coupled-tank, state feedback, Pole-Placement, linearization.