KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

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Title	Stability of Noise Reduction-Disturbance Observer in the presence of Actuator Dynamics
Authors	조남훈(Nam-Hoon Jo)
DOI	https://doi.org/10.5370/KIEE.2021.70.12.1940
Page	pp.1940-1945
ISSN	1975-8359
Keywords	Disturbance observer(DOB); Noise reduction-Disturbance observer(NR-DOB); Relative degree; Nominal model
Abstract	In this paper, we study the robust stability of closed-loop system with noise reduction-disturbance observer (NR-DOB) when the relative degree of plant is greater than that of nominal model. Compared with the case where the relative degree of plant is the same as that of nominal model, it is shown that the nominal model for NR-DOB controller should be carefully chosen in order to achieve the robust stability. Computer simulation results to confirm the proposed condition are also included.

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