汽车电子差速系统(EDS)控制算法研究

Study on Control Algorithms for Electronic Differential-gear System

建立了汽车加速过程的车轮和整车动力学模型,提出了基于驱动轮滑转率误差差值PID控制的电子差速系统控制算法,该控制算法对对开附着条件的路面具有较好的适应性。建立了该控制算法的汽车起步加速过程控制的仿真系统,分别对有、无电子差速系统和强制式差速锁车辆在对开路面上的起步加速性能进行了分析和验证,结果表明所提出的电子差速系统控制算法明显提高了车辆起步加速性能。

According to the mathematical models including the wheel and the vehicle dynamic models for starting acceleration process,an automobile EDS PID control method based on error difference between slip coefficient of driving wheel was presented,that the proposed scheme shows good adaptability to the split-road. A computer simulation study on the automobile started limit-slip control based on this strategy was implemented by the models, the paper carried out a comparison analysis on the simulation results of the system, with and without EDS, differential locking. Then the vehicle running status on roads with split coefficient was verified. Simulation results showed that the electronic differential-gear system considerably improved both the ride and handling performance of the vehicle.