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Simplification of z-transfer function via Padé approximation of tangent phase function

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2 Author(s)
Hwang, Chyi ; National Cheng Kung University, Taiwan, China ; Hang-Chun Chow

Simplification of z -transfer function is performed in the bilinear-transformed domain via approximating tangent phase function by a Padé technique. A modification has been given to the transformed transfer function so that the reduced z -transfer function has the same zero initial responses as the original system. The simplified z -transfer function is always stable and minimum phase.

Published in:

Automatic Control, IEEE Transactions on  (Volume:30 ,  Issue: 11 )