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Active Disturbance Rejection Control of a Magnetic Suspension System

Author:
Beltran-Carbajal, Francisco   Valderrabano-Gonzalez, Antonio   Favela-Contreras, Antonio R.   Rosas-Caro, Julio Cesar   


Journal:
Asian Journal of Control


Issue Date:
2015


Abstract(summary):

This paper proposes a novel output feedback control scheme for robust stabilization and tracking tasks in a magnetic suspension system. Active disturbance rejection control, differential flatness and on-line asymptotic disturbance estimation are properly used for the proposed control synthesis. The controlled system is subjected to a wide spectrum of unknown significant matched and unmatched disturbances due to external forces and voltages, parametric uncertainties, control and state-dependent perturbations and possibly input unmodeled dynamics. The effectiveness and robustness of the proposed active disturbance control scheme is verified by computer simulations for the robust tracking of a rest-to-rest reference position trajectory specified to firstly stabilize the suspended mass at a desired vertical position and next transfer it to another equilibrium position for both continuous and switched control voltage signals.


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