摘要
行星机构动力耦合器通过一组离合器的结合、分离实现混合动力汽车的各种驱动模式。运用虚拟杠杆法分析了行星机构动力耦合器的转速合成特性和转矩合成特性。为满足驱动模式切换过程的动态特性及离合器结合平顺的要求,研究了动力耦合器的模糊控制策略。该策略以加速踏板行程和踏板行程变化率为模糊输入量,得到的输出量为离合器结合的初始压力和结合时压力变化率。建立了动力耦合器的仿真模型,仿真结果表明该模糊控制策略既能反映驾驶员的操作意图,又能满足车辆的动力性和平顺性的要求。
The principle of coupler with planetary mechanism was HEV driving mode through a set of clutches engaging and elaborated. The coupler can decide the disengaging. The rotation and torque composition of coupler was analyzed through the means of virtual level. The fuzzy algorithm was proposed to control the clutches for desired transient and smooth performance. The acceleration pedal travel and its change rate were used as input, and the output were clutches initial pressure and the change rate of engaging pressure. The simulation model of the coupler with planetary mechanism was established finally. The simulation results showed that this control strategy could meet the driver operating demands, increase HEV speed and switch driving mode smoothly under different driving conditions.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第3期5-9,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
湖南省科技计划重点项目(项目编号:05GK2007)
