Brake-by-wire system for self-driving vehicles requires hydraulic pressure response of the master cylinder to be quick in the braking process, making its long-term precision paramount. This is particularly challenging for braking in response to the command of virtual driver instead of the real driver, for which the hydraulic pressure is nonlinear with the electric motor’s torque. While much of the research on brake-by-wire has focused on improving energy regeneration and vehicle stability, comparatively little is known about the braking pressure control of self-driving vehicles. Therefore, we develop a novel architecture of the electro-hydraulic brake-by-wire adopting ball screw for the self-driving, in which there is a quadratic-polynomial relationship between the position of the electric motor and the brake pressure of the master cylinder. The brake-by-wire dynamics model is built by the speed of the electric motor and the brake pressure of the master cylinder, and a sliding mode control law is designed based on the pressure demand of the master cylinder. Here we discuss a series of studies on electro-hydraulic braking dynamics that, collectively, design a pressure demand control approach of how the sliding mode controller operates the master cylinder pressure by the electric motor torque. Testing and analyzing the designed approach embedded into the braking control unit is applied to a vehicle test bench brake-by-wire to fully realize the accurate pressure tracking of the electro-hydraulic brake-by-wire system.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Electro-hydraulic braking dynamics for pressure demand control of brake-by-wire system


    Beteiligte:
    Jiang, Ligao (Autor:in) / Shi, Qin (Autor:in) / Wei, Yujiang (Autor:in) / He, Yunfeng (Autor:in) / He, Zejia (Autor:in) / He, Lin (Autor:in)


    Erscheinungsdatum :

    01.03.2024




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Electro-hydraulic drive-by-wire brake and braking system

    HE LIN / ZHANG XINYU / HE YUNFENG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Electro-hydraulic brake system with electric power assist and by-wire braking

    DENG WEIWEN / DING NENGGEN | Europäisches Patentamt | 2017

    Freier Zugriff

    Electro-hydraulic brake system with electric power assist and by-wire braking

    DENG WEIWEN / DING NENGGEN | Europäisches Patentamt | 2016

    Freier Zugriff

    Electro-hydraulic brake-by-wire system

    LIU JIA / LUO YING / ZHANG YILU | Europäisches Patentamt | 2021

    Freier Zugriff

    Hydraulic parking braking system and method based on electro-hydraulic brake

    PAN GUANGXIAN / YU FENG / ZHANG DONGSHENG et al. | Europäisches Patentamt | 2023

    Freier Zugriff