For off-road vehicles, minimizing the absorbed power is the main objective of suspension control. The primary cause of increase in the absorbed power in off-road vehicles driven at high speeds on harsh courses is the exhaustion of the suspension travel. Fuzzy-logic approach to active and semi-active off-road vehicle suspension control, with the goal of improving the speed of the vehicle over rough terrains are developed. The ride metric used for quantifying improvements is the absorbed power of the sprung mass. Particular attention is paid to the proper modeling of the suspension using both the full kinematic constraints and the more convenient two degree of freedom linear model of the quarter vehicle suspension. The nonlinearities due to the kinematic constraints on motion are accounted for by modifying the stiffness and damping coefficients of the suspension spring and dashpot in the linear model. The control laws are developed using the less complex model and demonstrated in the fully constrained environment. Nonlinearities of the suspension, including tire stiffness/damping and bumpstops are included at all stages of controller development.


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    Title :

    Fuzzy Logic Active and Semi-Active Control of Off-Road Vehicle Suspensions


    Contributors:

    Published in:

    Vehicle System Dynamics ; 32 , 4-5 ; 409-420


    Publication date :

    1999-11-01


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown






    Fuzzy Logic Active and Semi-Active Control of Off-Road Vehicle Suspensions

    Kashani, R. / Strelow, J. E. | British Library Conference Proceedings | 1999


    Fuzzy Logic Active and Semi-active Control of Off-road Vehicle Suspensions

    Kashani, R. / Strelow, J. / Society of Automotive Engineers of Japan | British Library Conference Proceedings | 1998