纯电动汽车与无级变速器匹配控制策略的建模与仿真

Modeling and Simulation of Match Control Strategy of Pure Electric Vehicle with Continuously Variable Transmission

为了更好地节约电动汽车电池能量、增加其续航里程及满足电动汽车在不同工况下的行驶要求。通过对机械电子式无级变速器的速比控制目标与要求进行分析,将驾驶员加速踏板的变化解释为瞬时的功率需求。利用MATLAB/Simulink和Cruise两种软件的各自优势,在MATLAB/Simulink环境中设计了一种经济性和动力性折衷的速比PID控制器以实现速比控制;在Cruise中搭建了整车模型,将Simulink中的模型以API形式导入并进行联合仿真分析。最后得出搭载EMCVT应用本文速比控制策略的电动汽车比搭载固定速比减速器的电动汽车加速时间短,爬坡能力更强,节约电池能量,续驶里程更长。

In order to better conserve battery energy of electric vehicle,increase its driving distance and meet with the requirements in different driving conditions of electric vehicle,the paper analyzes the speed ratio control objectives and requirements of the continuously variable transmission. The driver＇s accelerator pedal will be interpreted as the instantaneous power requirements. Taking advantage of their respective strengths of both MATLAB / Simulink and Cruise software,in the MATLAB / Simulink environment we designed a compromise speed ratio control strategy between power and economic PID controller of speed ratio,taking into account their respective advantage of MATLAB and Cruise software,in Cruise environment built a vehicle model,put the Simulink model through API interface into Cruise to complete co-simulation. The result of simulation is the vehicle with continuously variable transmission has better performance in terms of better acceleration,climbing ability stronger,more battery power saving,longer driving distance than the vehicle with fixed gear reducer.