title: Enhanced cascade control for a class of integrating processes with time delay.
abstract: Unlike self-regulating processes, cascade control strategies for control of integrating processes with time delay are limited. A novel series cascade control structure to enhance the closed loop performance is proposed for integrating and time delay processes. The proposed controller structure has only two controllers and a setpoint filter. The inner loop controller is designed based on IMC approach and the primary setpoint filter is based on optimal performance index. The primary load disturbance rejection controller, a PID controller in series with a lead/lag compensator, is designed on the basis of the desired closed-loop complementary sensitivity function. The robustness analysis is carried out using Kharitonov's theorem. Simulation results demonstrate the efficacy of the proposed method by showing satisfactory nominal and robust performances.
authors.affiliation: Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India. dola@iitg.ernet.in
authors.forename: Dola Gobinda
authors.initials: DG
authors.lastname: Padhan
authors.forename: Somanath
authors.initials: S
authors.lastname: Majhi
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005246:Feedback; D008962:Models, Theoretical