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Active Braking of an Electronic Brake Booster Facing Intelligent Automobile

Volume 14, Number 8, August 2018, pp. 1735-1744
DOI: 10.23940/ijpe.18.08.p10.17351744

Jian Wua, Pengcheng Chenb, Jian Zhaoa, and Rui Heb

aJilin University, Changchun, 130022, China
bState Key Lab of ASCL, Changchun, 130022, China


(Submitted on May 16, 2018; Revised on June 27, 2018; Accepted on July 22, 2018)

Abstract:

In this paper, a novel electronic brake booster and an accurate pressure control method for engineering are put forward and consider the shortcomings of the existing braking system in active braking for intelligent driving. Together with the hydraulic control unit, they are comprised of two working modes: active braking for automatic drive and passive braking for driver intervention. For wheel cylinder pressure control, we translate the control problem of pressure to position tracking. The strong nonlinearity and the load-dependent friction make the position tracking control of the electro-mechanical brake booster more challenging. Consequently, a modified PI control architecture is presented with techniques of cascaded three closed loop PI controller, friction compensation based on friction model, and gain scheduling. Finally, based on dSPACE, we carried out the rapid prototyping tests of active braking and hardware in the loop tests covering full speed ACC conditions. The results show that pressure control, acceleration control, and speed control achieve optimal performance.

 

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