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Biased Sinusoidal Disturbance Compensation With Unknown Frequency

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2 Author(s)
Giuseppe Fedele ; Dept. of Inf., Modeling, Electron. & Syst. Eng., Univ. of Calabria, Rende, Italy ; Andrea Ferrise

This note combines an adaptive frequency estimation scheme with a fractional-order controller for unknown biased sinusoidal disturbance rejection. The disturbance is estimated via an adaptive orthogonal signals generator based on a third-order generalized integrator. A fractional-order controller is designed which guarantees the closed-loop stability of the system if the location of the plant frequency response, at the estimated frequencies, lies in an half-plane passing through the origin of the complex plane.

Published in:

IEEE Transactions on Automatic Control  (Volume:58 ,  Issue: 12 )