This paper presents a traction fault accommodation system(TFAS) for four wheel independent drive electric vehicle (4WID EV), which can comprehensively address issues of drive capability, stability performance, reduce vehicle body impact and protect motor when fault occurs. This fault accommodation system uses available information to reallocate the traction force. Firstly, this strategy takes account of wheel force saturation and rate limitation as constraints; secondly, the strategy utilizes meeting desired longitudinal traction force and yaw moment as optimization objective; thirdly, the strategy takes account of the idea reducing priority in use of failure motor. Then, a dynamic control allocation method using constrained quadratic programming is proposed, which can be solved by active set method. Detailed simulations and trial results with an independent 4WID EV verify that the developed fault accommodation system provides significant benefits in terms of drive capability and stability performance while at the same time also meets demand of motor characteristics in different fault situation.


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    Title :

    Traction fault accommodation system for four wheel independently driven electric vehicle


    Contributors:
    Chu, Wenbo (author) / Luo, Yugong (author) / Dai, Yifan (author) / Li, Keqiang (author)

    Published in:

    Publication date :

    2012


    Size :

    6 Seiten, 5 Bilder, 2 Tabellen, 15 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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