Minimal realization of nonlinear systems described by input-outputdifference equations |
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Authors: | Sadegh N |
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Affiliation: | George W. Woodruff Sch. of Mech. Eng., Georgia Inst. of Technol., Atlanta, GA; |
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Abstract: | We consider a general class of nonlinear discrete-time systems described by their input-output (I/O) relationship. We first present the necessary and sufficient conditions for existence of a local observable state-space realization of the system and an explicit algorithm for computing it. In cases where the I/O map and its resulting realization are nonminimal, we formulate an algorithm for extracting its minimal realization whenever possible. The developed theory and algorithms are illustrated by means of several examples |
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