Necessary and sufficient conditions for existence of decoupling controllers. (English) Zbl 0890.93039

Author’s abstract: It is well known that if a linear time-invariant plant is free from coincidences of poles and zeros in the right half-plane, then it can be decoupled with internal stability under unity-feedback configuration. We consider plants for which such coincidences do occur and give necessary and sufficient conditions under which stabilizing decoupling controllers exist. The conditions derived, based on transfer matrices and residues, are simple and straightforward.
Reviewer: A.Perdon (Ancona)


93B52 Feedback control
93C05 Linear systems in control theory
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