American Journal of Applied Sciences

Designing of PID Controller for Discrete Time Linear System Using Balanced Approach Reduced Order Model

C.S. Ravichandran, S. Subha Rani and T. Manikandan

DOI : 10.3844/ajassp.2007.155.159

American Journal of Applied Sciences

Volume 4, Issue 3

Pages 155-159


Modeling physical systems usually results in complex high-order dynamic models. It is often desirable to approximate these models by simpler models with reduced order. This study deals with the design of discrete time linear system using a balanced approach reduced order model. The reduced order model retains the desired state variable which contains a significant contribution. A PID controller is designed for the reduced second order model to meet the desired performance specifications by using pole-zero cancellation method. The stabilization of linear discrete time system is achieved by selection of parameters of the PID controller. A numerical example is given to illustrate the design method.


© 2007 C.S. Ravichandran, S. Subha Rani and T. Manikandan. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.