中文摘要：

针对混合动力汽车低压辅助供电系统的应用要求，提出一种既能满足输入电压范围宽，又能实现给低压蓄电池进行合理充放电控制和能量管理的车载DC/DC辅助电源控制策略。在研究蓄电池三段式充电特性、各种工况及工作模式对DC/DC的要求和证明车载辅助供电系统微分平滑的基础上，提出了融合效率曲线、电流变化率与能量管理的多目标轨迹规划算法。为满足系统输出微分平滑的前提，即输出电流能快速准确跟踪参考电流，提出适合电流内环的双积分高阶定频准滑模控制算法，给出了数学模型和控制器设计方法。最后，搭建了系统仿真模型、工程样机及实验平台。仿真与实验结果及工程应用证明了所提DC/DC辅助电源控制策略的有效性和可行性。

英文摘要：

To meet the application demand of low-voltage auxiliary power supply system for hybrid electric vehicles （HEV）, a auxiliary power supply control strategy for vehicular DC/DC converters, which is enable to suit to the wide varying range of input voltage and can reasonably implement charging/discharging control of low-voltage battery and energy management, is proposed. On the basis of researching the demand of the three-segmental charging characteristics, various working conditions and operating modes of battery on DC/DC converter and proving the differential flatness of vehicular auxiliary power supply system, a multi-objective trajectory planning algorithm interfusing efficiency curve and current change rate with energy management is put forward. To meet the premise that the output the control system is differential flatness, i.e., the output current can track the reference current fast and accurately, a dual-integral high order and fix frequency quasi-sliding-mode control algorithm as well as its mathematical model and the design method of the controller are given. Finally, the simulation model, the engineering prototype and the experimental platform of the proposed control system are constructed. Results of simulation, experiments and engineering application show that the proposed auxiliary power supply control strategy for DC/DC converter is effective and feasible.