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A Simplification of Linear System via Frequency Transfer Function Synthesis  

김주식 (충북대 전기전자컴퓨터공학부)
김종근 (충북대 전기공학과)
유정웅 (충북대 전기전자컴퓨터공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.53, no.1, 2004 , pp. 16-21 More about this Journal
Abstract
This paper presents an approximation method for simplifying a high-order transfer function to a low-order transfer function. A model reduction is based on minimizing the error function weighted by the numerator polynomial of reduced systems. The proposed methods provide better low frequency fit and a computer aided algorithm that estimates the coefficients vector for the numerator and denominator polynomial on the simplified systems from an overdetermined linear system constructed by frequency responses of the original systems. Two examples are given to illustrate the feasibilities of the suggested schemes.
Keywords
simplification; model reduction; transfer function synthesis; LS; TLS;
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