优化制动转矩分布以提高四轮驱动混合电动车辆的稳定性  

Optimal Brake Torque Distribution for A Four-Wheel Drive Hybrid Electric Vehicl Stability Enhancement

作　　者：D-H Kim J-M Kim S-H Hwang H-S Kim 

机构地区：[1]School of Mechanical Engineering,Sungkyunkwan University

出　　处：《传动技术》2009年第4期45-48,共4页Drive System Technique

摘　　要：四轮驱动混合电动车辆稳定性控制逻辑建议采用后马达能量回收制动和一个电液制动器(EHB)。采用一个通常的算法,求得能量回收制动和EHB转矩之间最佳的转矩分布。根据已知输入的所要求的偏转转矩和道路摩擦系数,用该通常算法计算出最佳能量回收制动转矩和最佳的EHB转矩。基于最佳的制动转矩分布,相应驾驶员转向角和车辆速度,用模糊控制算法,车辆稳定控制逻辑建议形成所要求的偏转转矩,去补偿侧滑角和偏转率的误差。对单车道变更机动性用比较固定能量回收制动和最佳能量回收制动,判断车辆稳定性控制逻辑的性能。由仿真结果可以看到,在满足车辆稳定性的情况下,最佳能量回收制动可以比固定的能量回收制动增大能量回收。Vehicle stability control logic for a four-wheel-drive hybrid electric vehicle is proposed using the regenerative braking of the rear motor and an electrohydraulic brake （EHB）. To obtain the optimal brake torque distribution between the regenerative braking and the EHt3 torque, a genetic algorithm is used. The genetic algorithm calculates the optimal regenerative braking torque and the optimal EHB torque for the given inputs of the desired yaw moment and road friction coefficient. Based on the optimal brake torque distribution, the vehicle stability control logic proposed generates the desired direct yaw moment to compensate the errors of the side-slip angle and yaw rate by a fuzzy control algorithm corresponding to the driver ＇s steering angle and vehicle velocity. Performance of the vehicle stability control logic is evaluated by comparison of the fixed regenerative braking and the optimal regenerative braking for a single lane change manoeuvre. It is found from the simulation results that the optimal regenerative braking is able to provide the increased recuperation energy compared with the fixed regenerative braking while stisfying the vehicle stability.

关 键 词：四轮驱动 混合电动车辆 能量回收制动 车轮稳定性 控制 

分 类 号：U463.212[机械工程—车辆工程]