电子液压制动助力器设计与控制策略研究

Research on electro-hydraulic brake booster system design and control

伴随汽车电动化发展和主动安全技术要求,基于真空助力器的传统液压制动系统已经难以满足实际需求。因此,设计了一款电子液压制动助力器,首先剖析其工作原理同时针对电动助力和主动压力控制两种工况给出了完整的设计思路。然后分别提出了基于输出线性化的滑模电流控制和基于抗饱和PI算法的双闭环压力控制,最后通过仿真和台架实验验证了算法的可靠性。

Traditional vacuum brake booster is hard to satisfy demanding requirements of automobile electrification and active safety. Therefore, an electrohydraulic brake booster is designed. Firstly, the detailed description of basic function principles is presented meanwhile the control methods for brake booster and active brake pressure is proposed. Current control is realized by sliding mode method based on output feedback linearization and brake pressure control is achieved by dual-loop anti-saturation PI controller. Lastly, simulation and bench test verify the effectiveness of proposed methods in this paper.