牵引力控制系统中最优驱动力矩控制  

Optimum driven torque control for traction control systems

作　　者：杨财[1] 宋健[1] 李亮[1] 黄全安[1] 李红志[1] 

机构地区：[1]清华大学汽车工程系,汽车安全与节能国家重点试验室,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第11期1989-1992,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50575120)

摘　　要：为了解决低附着路面上发动机输出力矩过大引起的驱动轮过度滑转及路面附着系数利用率低的问题,提出了牵引力控制系统中最优驱动力矩控制的概念,并给出了其实现方法。将理论分析结果和实车试验数据特点相结合,利用参考车速来估算路面附着系数并由此计算最优驱动力矩。利用PID控制器控制发动机动态输出力矩以实现最优驱动力矩控制。实车试验结果表明:低附路面上该方法能够有效控制发动机的驱动力矩,使得驱动轮的滑转率保持在最优滑转率处,对路面附着系数的利用率达到90%以上,该方法能够提高车辆在低附路面上的驱动能力。High engine output torque may lead to high slip ratios of driven wheels and low utilization of road friction coefficients on a slippery road. The concept of optimum driven torque control was introduced to solve this problem. With consideration of both theoretical analyses and experimental data, the vehicle reference velocity was used to estimate the road friction coefficient and calculate the optimum driven torque. The optimum driven torque control was realized by controlling the dynamic engine output torque with a PID controller. Experiments with real vehicles show that this method can control the engine output torque and keep the driven wheel slip ratio in the optimum slip ratio region, with road-tire friction coefficient utilization rates of higher than 90~. Therefore, this method improves the vehicle acceleration ability on a slippery road.

关 键 词：车辆动力学 扭矩控制 路面附着系数 牵引力控制 

分 类 号：U467.1[机械工程—车辆工程]