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Analytical design of PID controller cascaded with a lead-lag filter for time-delay processes
M. Shamsuzzoha,Seunghyun Lee,이문용 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.3
An analytical method for the design of a proportional-integral-derivative (PID) controller cascaded with a second-order lead-lag filter is proposed for various types of time-delay process. The proposed design method is based on the IMC-PID method to obtain a desired, closed-loop response. The process dead time is approximated by using the appropriate Pade expansion to convert the ideal feedback controller to the proposed PID•filter structure with little loss of accuracy. The resulting PID•filter controller efficiently compensates for the dominant process poles and zeros and significantly improves the closed-loop performance. The simulation results demonstrate the superior performance of the proposed PID•filter controller over the conventional PID controllers. A guideline for the closed-loop time constant, λ, is also suggested for the FOPDT and SOPDT models.
IMC–PID Approach: An Effective Way to Get an Analytical Design of Robust PID Controller
Moonyong Lee,M. Shamsuzzoha,Truong Nguyen Luan Vu 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
In this paper, the analytical PID controller design methodology of the SISO and MIMO processes has been discussed on the basis of the IMC principle. The paper deals with two issues: firstly emphasizes on a tuning method of a SISO stable and unstable process and secondly a MIMO tuning rule. To verify the superiority of the proposed tuning method, simulation studies have been conducted on several process models. The results show that the proposed tuning method has a convincing result for wide classes of process models. The robustness analysis is also carried out by inserting a perturbation in each of the process parameters simultaneously, with the results demonstrating the better robustness of the proposed controller design with parameter uncertainty.
IMC-PID controller tuning from closed-loop setpoint response
Mudassir Hasan,M. Shamsuzzoha,Moonyong Lee 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
The proposed IMC-PID tuning method is extension of the recently published setpoint overshoot method (2010). It is one step procedure to obtain the PI/PID setting which gives the better performance and robustness. The method requires one closed-loop step setpoint response experiment using a proportional only controller with gain Kc0. Based on simulations for a range of first-order with delay processes, simple correlations have been derived to give PI/PID.filter controller settings. The controller gain (Kc/Kc0) is only a function of the overshoot observed in the setpoint experiment. The controller integral and derivative time (τI and τD) is mainly a function of the time to reach the first peak (tp). The proposed tuning method shows better performance than the setpoint overshoot method (2010) for broad range of processes.