A nonlinear harmonic disturbance observer for nonlinear systems subject to harmonics is designed and stability of the proposed observer is established using passivity approach. A systematic procedure to choose the nonlinear gain function in the observer is proposed. The proposed nonlinear disturbance observer can be integrated with a linear/nonlinear controller to improve its disturbance attenuation ability for nonlinear systems under harmonics.
Harmonic Disturbance Observer for Nonlinear Systems
Contributed by the Dynamic Systems and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division, April 2001; final revision, August 2002. Associate Editor: E. Misawa.
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Chen , W. (March 10, 2003). "Harmonic Disturbance Observer for Nonlinear Systems ." ASME. J. Dyn. Sys., Meas., Control. March 2003; 125(1): 114–117. https://doi.org/10.1115/1.1543551
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