A Comparative Analysis of Various Decoupling Techniques Using Frequency Domain Specifications
K. R. Achu Govind, Subhasish Mahapatra, Soumya Ranjan Mahapatro
Abstract
A comparative analysis of various decoupling techniques is carried out in this paper. As most industries deal with multi-input multi-output (MIMO) systems, decouplers are widely used to reduce loop interactions. The design procedure for the commonly used decouplers is explained briefly along with their advantages and disadvantages. The reduced order first order plus dead time (FOPDT) model is obtained for each of the decoupled subsystems. Further, the PI controller is designed based on the frequency domain specifications to attain the design criteria. The servo and regulatory responses of the decouplers are contrasted with each other. Further, a robustness study is carried out for the designed subsystems.