In the literature, one can distinguish two completely different kinds of anti-lock brake system designs: those based on logic switching from wheel deceleration information and those based on wheel slip regulation. In the authors' previous work, they proposed a new algorithm based on wheel deceleration thresholds and a method for analyzing the limit cycles that appear with this kind of strategies (which gives some elements for tuning the different parameters that are involved in the algorithm). The aim of the present paper is to extend, in three new directions, their previous results. Firstly, they improve the basic five-phase strategy by adding a phase during which the brake torque is increased slowly; and they analyse the consequences of this modification on the limit cycles of the algorithm. Secondly, they consider the problem of discontinuous transitions of road characteristics, and propose a new eleven-phase strategy that is robust to such discontinuous transitions. Thirdly, they consider the synchronization problem (between the front wheels) and the anti-synchronization problem (between the rear wheels), in order to obtain a coordinated behavior among the four independent ABS strategies applied to each wheel of the vehicle. In this paper, they only present an overview on some ABS algorithms they have obtained recently. It is impossible, in the six pages of these proceedings, to treat all the mathematical problems associated with these algorithms.


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    Title :

    Jumps and synchronization in anti-lock brake algorithms


    Additional title:

    Sprünge und Synchronisation in ABS-Algorithmen


    Contributors:


    Publication date :

    2008


    Size :

    6 Seiten, 7 Bilder, 8 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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