基于驾驶性能优化的混合动力车辆动态控制策略研究

针对混合动力车辆在动态过程中的最优控制问题，提出了一种基于驾驶性能优化的动态控制策略。根据功率分流混合动力系统的结构特点，建立了面向控制问题的功率流动态分配模型。根据驾驶员的期望状态与车辆的实际状态，提出了驾驶性能的指标函数。阐述了优先满足驾驶性能的综合控制策略，在优化模型中充分考虑了各部件的动态响应特性和发动机的转速跟踪要求，并且提出了驾驶性能实时优化算法。仿真结果表明，与传统的优化策略相比，该控制策略在不牺牲燃油经济性的同时显著提升了驾驶性能。

Research on Dynamic Control Strategy of a HEV Based on Drivability Optimization

To solve the optimal control problem of HEVs during the dynamic process, a dynamic control strategy was proposed based on drivability optimization. A control-oriented dynamic power distribution model was established according to the characteristics of the power-split hybrid electric system. Based on the driver's expected status and the vehicle's actual status, the index function of the drivability was come up with. A control strategy satisfying the drivability was presented firstly. The dynamic characteristics of the different components and the speed tracing requirements of the engine were fully considered in the optimization model. Additionally, a real-time optimization algorithm of the drivability was proposed. It can be seen from the simulation results that this control method improves the drivability dramatically without scarifying the fuel economy.