Model reduction for discrete-time dynamic systems †

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Abstract
The model reduction techniques of Marshall and Davison for linear continuous-time models are extended for use in reducing the order of linear discrete-time models. Two approaches for the reduction of high-order continuous-time models to low-order discrete-time models are presented and evaluated. The resulting reduced order discrete-time models obtained by the two approaches are shown to be equivalent. A simple numerical example is solved to demonstrate the techniques presented.

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