The paper is concerned with the possible performance improvements which can be obtained in an automotive active suspension system through the use of adaptive rather than fixed control. The study is wholly theoretical and treats a quarter-car, slow-active, electro-hydraulic-pneumatic suspension with elastic limit stops, through simulation of running at a constant speed on randomly profiled roads. The adaptation is intended to adjust the system operation according to the prevailing road roughness level. mad spectral properties being assumed average at all times. The road roughness estimation process is illustrated. The estimate is used to drive a gain scheduling adaptive scheme. Comparisons are made between adaptive slow-active systems. non-adaptive slow-active systems and a typical passive system. mainly by means of root mean square values of response variables. It is concluded that the assumptions made in such a study can exert a large influence on the nature of results obtained, giving rise to potentially conflicting interpretations. The present results indicate that adaptation of the type proposed has very limited value.


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    Title :

    PERFORMANCE ENHANCEMENT BY CONTROL LAW ADAPTATION IN SLOW-ACTIVE ROAD VEHICLE SUSPENSIONS


    Contributors:
    PILBEAM, C (author) / SHARP, R S (author)

    Published in:

    Vehicle System Dynamics ; 25 , sup1 ; 533-546


    Publication date :

    1996-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown



    Performance Enhancement by Control Law Adaptation in Slow-Active Road Vehicle Suspensions

    Pilbeam, C. / Sharp, R. S. / International Association for Vehicle System Dynamics | British Library Conference Proceedings | 1996



    Performance enhancement by control law adaption in slow-active road vehicle suspensions

    Pilbeam,C. / Sharp,R.S. / Cranfield Univ.,School of Mech.Engng.,GB | Automotive engineering | 1995