In this study, a new hybrid stability-control system based on the concepts of GVC and DYC was developed. This system controls deceleration of the vehicle according to the information on vehicle lateral jerk and yaw moment according to the information on vehicle skidding. The effectiveness of GVC in preventing understeer was verified by vehicle tests on dry asphalt (high-friction) and snowy (low-friction) surfaces. The test results are summarised as follows. First, automatic braking was activated earlier under the hybrid control, which is a combination of DYC and GVC, than under DYC only. Second, understeer was compensated significantly on both dry asphalt and snowy surfaces by the hybrid control. Third, the advantages of the hybrid control system are that it decreases the steering effort exerted by the driver and that the vehicle loses little stability even on a slippery surface. The early braking caused by GVC slows down the vehicle and enhances its yaw motion when the lateral acceleration increases (because a shift in the vertical load caused by this deceleration increases the lateral force acting on the front wheels). In addition, it prevents excessive steering because it works in the very early stage of cornering. For these two reasons, the hybrid control system effectively prevents not only understeer but also oversteer, thereby improving the cornering performance.It is thus concluded that this hybrid control (combining DYC and GVC) will compensate the steer characteristics and reduce traffic accidents as a consequence.


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    Title :

    A hybrid stability-control system: Combining direct-yaw-moment control and G-Vectoring Control


    Contributors:


    Publication date :

    2012


    Size :

    13 Seiten, 16 Bilder, 6 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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