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Contributions to the model reduction problem

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3 Author(s)
Gutman, P.-O. ; Lund Institute of Technology, Lund, Sweden ; Mannerfelt, C. ; Molander, P.

A new method of model reduction is introduced based on the differentiation of polynomials. The reciprocals of the numerator and denominator polynomials of the high-order transfer function are differentiated suitably many times to yield the coefficients of the reduced order transfer function. An error analysis shows the accuracy of the method, and an eighth-order example illustrates it. The method is computationally very simple and is equally applicable to unstable and nonminimum phase systems.

Published in:

Automatic Control, IEEE Transactions on  (Volume:27 ,  Issue: 2 )