基于混杂系统理论的混合动力汽车驱制动控制研究

A Study on the Driving and Braking Controls for Hybrid Electric Vehicle Based on Hybrid System Theory

基于混杂系统理论,对后轮驱动混合动力汽车的动力系统进行分析,基于混杂自动机模型建立了HEV动力系统控制模型。提出了模式变换式驱动控制策略和制动力协调控制的再生制动控制策略。采用Simulink/Stateflow混合建模方法,建立了HEV动力系统控制策略仿真模型,并进行了实例HEV样车性能仿真和道路试验。结果表明:实例HEV性能满足设计要求;在中国典型城市公交循环工况下,与同类型传统汽车相比,燃料消耗量减少15.9%。

Based on hybrid system theory,the powertrain system of a hybrid electric vehicle（HEV） with rear wheel drive is analyzed,a control model for HEV powertrain system is built based on hybrid automaton model,and a mode-switch-based drive control strategy and a regenerative braking control strategy with braking force coordination control are proposed.Then a simulation model for HEV powertrain control strategy is set up with Simulink/Stateflow hybrid modeling method,and both performance simulation and road test on a real sample HEV are conducted.The results show that the performance of real sample HEV meets the design requirements with its fuel consumption 15.9% less than the traditional vehicle of same category under the typical urban driving cycles in China.