针对搭载回流式动力耦合传动系统的插电式混合动力汽车(PHEV,plug-in hybrid electric vehicle),提出了一种参数匹配优化设计方法。建立了整车各个模式下的等效输入功率模型,根据最小等效输入功率原则制定了各驱动模式间的切换规律,并...针对搭载回流式动力耦合传动系统的插电式混合动力汽车(PHEV,plug-in hybrid electric vehicle),提出了一种参数匹配优化设计方法。建立了整车各个模式下的等效输入功率模型,根据最小等效输入功率原则制定了各驱动模式间的切换规律,并设置控制参数系数对模式切换曲线进行调整。通过MATLAB/SIMULINK构建了整车经济性仿真模型,利用遗传算法对匹配的动力参数和控制参数系数进行了综合优化。仿真结果比较表明:此方法得到的一组参数能有效提升燃油经济性,百公里等效燃油消耗比优化前降低了4.8%。展开更多
A new non-linear transverse-torsional coupled model was proposed for 2K-H planetary gear train, and gear's geometric eccentricity error, comprehensive transmission error, time-varying meshing stiffness, sun-planet...A new non-linear transverse-torsional coupled model was proposed for 2K-H planetary gear train, and gear's geometric eccentricity error, comprehensive transmission error, time-varying meshing stiffness, sun-planet and planet-ring gear pair's backlashes and sun gear's bearing clearance were taken into consideration. The solution of differential governing equation of motion was solved by applying variable step-size Runge-Kutta numerical integration method. The system motion state was investigated systematically and qualitatively, and exhibited diverse characteristics of bifurcation and chaos as well as non-linear behavior under different bifurcation parameters including meshing frequency, sun-planet backlash, planet-ring backlash and sun gear's bearing clearance. Analysis results show that the increasing damping could suppress the region of chaotic motion and improve the system's stability significantly. The route of crisis to chaotic motion was observed under the bifurcation parameter of meshing frequency. However, the routes of period doubling and crisis to chaos were identified under the bifurcation parameter of sun-planet backlash; besides, several different types of routes to chaos were observed and coexisted under the bifurcation parameter of planet-ring backlash including period doubling, Hopf bifurcation, 3T-periodic channel and crisis. Additionally, planet-ring backlash generated a strong coupling effect to system's non-linear behavior while the sun gear's bearing clearance produced weak coupling effect. Finally, quasi-periodic motion could be found under all above–mentioned bifurcation parameters and closely associated with the 3T-periodic motion.展开更多
文摘针对搭载回流式动力耦合传动系统的插电式混合动力汽车(PHEV,plug-in hybrid electric vehicle),提出了一种参数匹配优化设计方法。建立了整车各个模式下的等效输入功率模型,根据最小等效输入功率原则制定了各驱动模式间的切换规律,并设置控制参数系数对模式切换曲线进行调整。通过MATLAB/SIMULINK构建了整车经济性仿真模型,利用遗传算法对匹配的动力参数和控制参数系数进行了综合优化。仿真结果比较表明:此方法得到的一组参数能有效提升燃油经济性,百公里等效燃油消耗比优化前降低了4.8%。
基金Projects(51375226,51305196,51475226) supported by the National Natural Science Foundation of ChinaProjects(NZ2013303,NZ2014201) supported by the Fundamental Research Funds for the Central Universities,China
文摘A new non-linear transverse-torsional coupled model was proposed for 2K-H planetary gear train, and gear's geometric eccentricity error, comprehensive transmission error, time-varying meshing stiffness, sun-planet and planet-ring gear pair's backlashes and sun gear's bearing clearance were taken into consideration. The solution of differential governing equation of motion was solved by applying variable step-size Runge-Kutta numerical integration method. The system motion state was investigated systematically and qualitatively, and exhibited diverse characteristics of bifurcation and chaos as well as non-linear behavior under different bifurcation parameters including meshing frequency, sun-planet backlash, planet-ring backlash and sun gear's bearing clearance. Analysis results show that the increasing damping could suppress the region of chaotic motion and improve the system's stability significantly. The route of crisis to chaotic motion was observed under the bifurcation parameter of meshing frequency. However, the routes of period doubling and crisis to chaos were identified under the bifurcation parameter of sun-planet backlash; besides, several different types of routes to chaos were observed and coexisted under the bifurcation parameter of planet-ring backlash including period doubling, Hopf bifurcation, 3T-periodic channel and crisis. Additionally, planet-ring backlash generated a strong coupling effect to system's non-linear behavior while the sun gear's bearing clearance produced weak coupling effect. Finally, quasi-periodic motion could be found under all above–mentioned bifurcation parameters and closely associated with the 3T-periodic motion.
