集成式电子液压制动系统的复合制动协调控制

在电动汽车复合制动过渡工况中,针对液压制动力与电机制动力配合不好造成的冲击度问题,提出了双闭环反馈和电机力修正的协调策略.其中双闭环反馈策略依靠电机力来补偿液压系统的液压力跟踪误差,电机力修正策略的作用是让电机在过渡工况下始终具有补偿能力.结合集成式电子液压制动系统(I-EHB)进行仿真及硬件在环试验,试验结果表明所提出的策略能大幅减小制动力切换时的冲击度,提高车辆制动舒适性.

Coordinated Control of Hybrid Braking Based on Integrated-Electro-hydraulic Brake System

In the transitional conditions of hybrid braking of electric vehicle, for the impact caused by the poor cooperation between the hydraulic braking force and the motor braking force, a coordination strategy of double closed loop feedback and motor force correction was proposed. The double closed-loop feedback strategy relies on the motor force to compensate for the tracking error of hydraulic pressure of the hydraulic brake system, the purpose of the motor force correction strategy is to guarantee the motor to have the compensation capability under all transient conditions. The simulation and hardware in-loop test are carried out based on the integrated-electro-hydraulic brake system (I-EHB). The test results show that the proposed strategy can significantly reduce the impact degree in the braking force switching conditions and improve the vehicle braking comfort.