A study of an electric parking brake system for emergency braking Online publication date: Sun, 05-Jul-2015
by Bin Wang; Xuexun Guo; Wei Zhang; Zhenfu Chen
International Journal of Vehicle Design (IJVD), Vol. 67, No. 4, 2015
Abstract: In this paper, an emergency braking control with electric parking brake (EPB) actuator is proposed and studied. Emergency braking requires a good slip ratio control algorithm to guarantee the brake stability. It is well known that the X-by-wire technologies have considerable advantages over the traditional hydraulic system, especially, bringing great strengths to complex control systems. As one of the brake-by-wire systems, EPB has been used as an advanced parking system in some luxury cars. However, it still has some untapped potential, e.g., dynamic braking. The paper proposes a sliding mode control (SMC) algorithm to effectively control the dc motor in EPB system to attenuate the torque tracking error. Simulation results from a quarter vehicle model with EPB actuator as a spare dynamic braking system show that the proposed control architecture with three sliding surfaces can effectively improve the emergency braking performance in the typical simulation manoeuvres employed and significantly reduce the tracking errors.
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