This article focuses on the modelling and robust control of a DC motor-based electromagnetic active suspension. Due to the small damping of the motor, the moments of inertia of the rotor and the nut can significantly affect the high-frequency performance of the suspension system and so, they are taken into consideration in the system modelling. In addition, parameter variations of the vehicle system and the unmodelled high-order dynamics of the actuator could influence the control effectiveness. Thus, the mixed uncertainties, composed of both multiple parameter uncertainties and the unmodelled high-order dynamics of the suspension and actuator are taken into account in the system model. To ensure the robustness and performance of the uncertain suspension system, a robust controller based on mixed µ-synthesis is designed. An easy method of choosing the weighting functions is proposed. The simulation results show the mixed μ-synthesis controller can meet the requirement of robust performance in the presence of mixed uncertainties and can achieve good ride comfort.


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    Title :

    Robust controller design for an electromagnetic active suspension subjected to mixed uncertainties


    Contributors:
    Zhang, Yongchao (author) / Cao, Jianyong (author) / Zhang, Guoguang (author) / Yu, Fan (author)

    Published in:

    Publication date :

    2013


    Size :

    27 Seiten, 25 Bilder, 4 Tabellen, 23 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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