基于混合系统理论的再生制动系统控制策略研究

再生制动是提高混合动力客车(hybridel ectricbus,HEB)经济性的重要手段。以后轮驱动的HEB为研究对象,提出了电机再生制动力和摩擦制动力以及整车前、后轮制动力协调控制的再生制动系统控制策略。基于混合系统理论描述了HEB再生制动系统,采用MATLAB/Simulink/Stateflow混合建模方法,建立了制动力协调控制的HEB再生制动系统控制策略仿真模型,并基于Advisor软件平台对实例HEB分别在中国典型城市循环工况和UDDS循环工况下进行仿真分析,结果表明,采用制动力协调控制策略制动能量回收率分别达到48.7%和50.9%,整车燃油经济性分别提高14.3%和12.8%。

Study on control strategy of regenerative braking system based on hybrid system theory

Regenerative braking is an important method to improve the economy of the Hybrid Electric Bus（HEB）.With HEB of rear-wheel drive as the study object,a coordinated control strategy of front and rear brake force distributions was proposed,in which the combination of regenerative braking and friction braking was adopted.A hybrid dynamical system theory was introduced to formulate the regenerative braking system for HEB.A hybrid modeling method was presented based on the Matlab/Simulink/Stateflow.The coordinated control strategy simulation model of the regenerative braking system for HEB was established.The simulations were carried on instance HEB by Advisor.On typical urban driving cycles and UDDS simulation results show the recovery coefficient reached 48.7% and 50.9%,while fuel economy can increase by12.8% and 14.3%.