Enhanced IMC based PID controller design for non-minimum phase (NMP) integrating processes with time delays.
Internal model control (IMC) with optimal H2minimization framework is proposed in this paper for design of proportional-integral-derivative (PID) controllers. The controller design is addressed for integrating and double integrating time delay processes with right half plane (RHP) zeros. Blaschke product is used to derive the optimal controller. There is a single adjustable closed loop tuning parameter for controller design. Systematic guidelines are provided for selection of this tuning parameter based on maximum sensitivity. Simulation studies have been carried out on various integrating time delay processes to show the advantages of the proposed method. The proposed controller provides enhanced closed loop performances when compared to recently reported methods in the literature. Quantitative comparative analysis has been carried out using the performance indices, Integral Absolute Error (IAE) and Total Variation (TV).
Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, Tamilnadu, India.
K
K
Ghousiya Begum
Department of Chemical Engineering, National Institute of Technology, Warangal 506004, Telangana, India. Electronic address: seshagiri@nitw.ac.in.
A
A
Seshagiri Rao
Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli 620015, Tamilnadu, India.
T K
TK
Radhakrishnan
H(2) minimization; Internal model control; Maximum sensitivity; PID controller; Positive zero; Process control