Abstract
AbstractA design method for the design of discrete-time gain-scheduling controllers for the rejection of disturbances with time-varying dynamics is presented. The disturbance is modeled as the output of a linear parameter-varying system in linear-fractional-transformation form. The work is motivated by the rejection of harmonic disturbances with time-varying frequencies, a problem that arises in active noise and vibration control. The design method is described in detail and experimental real-time results obtained with an active noise control headset are presented. Over existing approaches (such as adaptive filtering or gain-scheduled observer-based state feedback) the proposed method has the advantage that it leads to a stable closed-loop system even for arbitrarily fast changes of the disturbance frequencies.
Published Version
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