In this paper, the nonlinear effect of roll moment distribution to vehicle handling is transformed into a linear control objective, which can be easily cooperated into a general suspension control framework and achieved by linear control strategies. The integrated controller preserves vehicle steady-state handling characteristics, regardless of lateral acceleration changes due to driving manoeuvres such as forward speed changes. Vehicles in the market are generally designed to be of understeer and sometimes are equipped with anti-roll bars for a sufficient safety margin, although a neutral steer vehicle is in accord with human intuition when cornering. The research presented in this paper provides the opportunity of designing a slightly understeered and nearly neutral-steer vehicle. The control strategy can improve vehicle steady-state handling without scarifying vehicle cornering stability, and it can, in fact, reinforce vehicle steering safety as shown in the simulations. Although the integrated suspension control can somehow improve vehicle steady-state handling, active steering technologies, such as active front-wheel steering, four-wheel steering, etc, should be deployed in order to significantly improve vehicle handling performance. The research presented in this paper by no means intends to replace these active steering technologies, but should be regarded as a complement to them. In the future, a more generalised case will be considered. For example tyres do not necessarily need to be identical and actuator dynamics will be incorporated into the design. Since the integrated suspension control discussed in this paper is, by its very nature, a multiple-objective design, it may be more appropriately dealt with by multi-objective control strategies. It is also of great interest to investigate the influence of vehicle pitch moment (i.e. longitudinal load transfer) on vehicle ride and handling.


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    Title :

    Integrated vehicle ride and steady-state handling control via active suspensions


    Contributors:
    Wang, Jun (author) / Wilson, David A. (author) / Xu, Wenli (author) / Crolla, David A. (author)

    Published in:

    Publication date :

    2006


    Size :

    22 Seiten, 15 Bilder, 1 Tabelle, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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    Integrated vehicle ride and roll control via active suspensions

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