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Observer design in the presence of periodic output disturbances by mixing of past and present output data

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2 Author(s)
Grip, H.F. ; Dept. of Eng. Cybern., Norwegian Univ. of Sci. & Technol., Trondheim, Norway ; Saberi, A.

We consider the problem of observer design for systems with periodic disturbances in the system outputs. Assuming that the period T of the disturbance is known, we introduce the idea of mixing past and present output data to remove the disturbance, by defining a new output as the difference between the original output at time t and at time t-T .We determine the exact conditions under which the system is observable from the redefined output, and specify how to design an observer using regular pole-placement techniques and linear time-invariant analysis. We validate the design through simulations.

Published in:

Decision and Control, 2009 held jointly with the 2009 28th Chinese Control Conference. CDC/CCC 2009. Proceedings of the 48th IEEE Conference on

Date of Conference:

15-18 Dec. 2009