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Disturbance rejection by proportional and derivative output feedback. (English) Zbl 0859.93022
The paper deals with the disturbance rejection of linear systems of the form \(\dot x=Ax+Bu\), \(y=Cx+e\) where \(e\) is a disturbance signal. As a solution, the authors propose a nonproper solution containing proportional and derivative (state) feedback. To avoid the nonproperness of the given solution, an approximate proper control scheme is given. Such approximate solutions are discussed for both minimum phase and non-minimum phase systems, and are illustrated by means of a few simulation examples.

93B52 Feedback control
93C73 Perturbations in control/observation systems
93B27 Geometric methods
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