Several control policies of a full-car 7-DOF semi-active system, namely skyhook, groundhook and hybrid controls, are presented. Their ride comfort, suspension displacement and road-holding performances are analyzed and compared with passive systems. The analysis covers both transient and steady-state responses in the time domain and transmissibility response in the frequency domain. The results show that the hybrid control policy yields better comfort than a passive suspension, without reducing the road-holding quality or increasing the suspension displacement for typical passenger cars. Skyhook control policy significantly improves performance of all responses, while groundhook control policy significantly improves the responses when input frequency is equivalent to natural frequencies. The hybrid control policy is also shown to be a better compromise between comfort, road holding and suspension displacement than the skyhook and groundhook control policies.


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    Title :

    Dynamics and control policies analysis of semi-active suspension systems using a full-car model


    Contributors:


    Publication date :

    2007


    Size :

    36 Seiten, 29 Bilder, 3 Tabellen, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English