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A simple and direct method of reducing order of linear systems using routh approximations in the frequency domain

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2 Author(s)
Krishnamurthi, V. ; Indian Institute of Technology, Madras, India ; Seshadri, V.

A simple and direct method of approximating higher order systems by lower order ones based on Routh approximants without using reciprocal transformations is proposed. New algorithms for constructing reduced order transfer functions are presented. A method of approximating unstable systems with poles in RHP is also proposed resulting in unique transfer functions.

Published in:

Automatic Control, IEEE Transactions on  (Volume:21 ,  Issue: 5 )