Recent developments have demonstrated that the brake pedal simulator (BPS) is becoming an indispensable appara-tus for the break-by-wire systems in future electric vehicles. Its main function is to provide the driver with a comfort- able pedal feel to improve braking safety and comfort. This paper presents the development and control of an adjust-able BPS, using a disk-type magnetorheological (MR) damper as the passive braking reaction generator to simulate the traditional pedal feel. A detailed description of the mechanical design of the MR damper-based BSP (MRDBBPS) is presented in this paper. Several basic performance experiments on the MRDBBPS prototype are conducted. A return-to-zero (RTZ) algorithm is proposed to avoid hysteresis and improve the repeatability of the pedal force. In addition, an RTZ algorithm-based real-time current-tracking controller (RTZRC) is designed in consideration of the response lag of the coil circuit. Finally, an experimental system is established by integrating the MRDBBPS prototype into a self- developed automotive MR braking test bench (AMRBTB), and several control and braking experiments are performed. This research proposes a RTZRC control algorithm which can significantly increase the tracking accuracy of the brake pedal characteristic curve, particularly at a high pedal velocity. Additionally, the designed MRDBBPS prototype can achieve an effective and favorable control of the AMRBTB with a good repeatability.

Daoming Wang;Biao Wang;Bin Zi;Xianxu Bai;Wuwei Chen

School of Mechanical Engineering,Hefei University of Technology, Hefei 230009,China;School of Automobile and Transportation Engineering,Hefei University of Technology,Hefei 230009,China

中国机械工程学报

[1]Daoming Wang;Biao Wang;Bin Zi;Xianxu Bai;Wuwei Chen-.Development and Control of a Magnetorheological Damper?Based Brake Pedal Simulator for Vehicle Brake?by?Wire Systems)[J].中国机械工程学报,2022(06):74-86

Pedal,pedal,appara,MRDBBPS,RTZ,RTZRC,AMRBTB

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