Anti-windup Scheme for the Controller of Integrating Processes with Dead-time

IntroductionRecently , the integrating processes with dead-ti mewere attached more attention, and many papers proposedthe novel controllers to deal with them1 8]. Zhongdesigned a new disturbance observer-based2DoF controlscheme ,and the new controller can deal with the first orhigh order integrating systems with step or ramp loaddisturbance5]. And then, Zhong analyzed the controlsystemstability with robust theory6].Without the control input saturation, the theoreticaland si mulation resul…

Anti-windup Scheme for the Controller of Integrating Processes with Dead-time

For the first-order integrating processes with long delay, the disturbance observer-based 2DoF control scheme is analyzed in detail with regard to the control input limitation. After that, a simple anti-windup scheme, without an additional parameter, is proposed to compensate for the adverse effects of the input saturation. The proposed method can properly keep the control signal saturated for an optimum length of time without discarding the control energy. The simulation results show that the control input saturation can dramatically degrade the closed loop system performance. Under the nonfinal and model uncertainty cases, the controller with anti-windup strategy will obtain fast and smooth responses. Furthermore, the simulation results illustrate that the proposed anti-windup scheme may achieve good performance for the high order integrating processes with long delay.