Comparative Analysis of Different Methods of Model Order Reduction for Linear, Time-Invariant Systems

摘要

In this paper, to ind a lower order model equivalent to a given higher order system, a simple method based on T.C Hsia's approximation method is proposed. To examine the accuracy of the proposed method, it is compared with the Hutton and Friedland's approach which uses a and β parameters. To demonstrate the correctness and eicacy of the proposed method, a fourth order system is reduced to irst and second order using both the methods. The various performance indices of the reduced systems, obtained from the graphs plotted in Matlab platform are compared and analysed.