A local improvement procedure based on tabu search(TS) was incorporated into a basic genetic algorithm(GA) and a global optimal algorithm,i.e.,hybrid genetic algorithm(HGA) approach was used to search the circular and...A local improvement procedure based on tabu search(TS) was incorporated into a basic genetic algorithm(GA) and a global optimal algorithm,i.e.,hybrid genetic algorithm(HGA) approach was used to search the circular and noncircular slip surfaces associated with their minimum safety factors.The slope safety factors of circular and noncircular critical slip surfaces were calculated by the simplified Bishop method and an improved Morgenstern-Price method which can be conveniently programmed,respectively.Comparisons with other methods were made which indicate the high efficiency and accuracy of the HGA approach.The HGA approach was used to calculate one case example and the results demonstrated its applicability to practical engineering.展开更多
文摘以一款混联插电式混合动力汽车(Plug-in hybrid electric vehicle,PHEV)的燃油经济性为研究目标,为改善以等效因子为核心的等效燃油瞬时消耗最小策略(Equivalent fuel consumption minimization strategy,ECMS)的控制效果,考虑电池荷电状态(State of charge,SOC)、等效因子与燃油消耗的关系,构建等效因子全局优化模型;利用遗传算法离线优化一定工况下的等效因子S,得到不同电消耗续航行驶里程与电池SOC初始值的最佳等效因子MAP图,建立基于等效因子优化的ECMS能量管理策略,并考虑动力电池、电动机等部件的效率,获得最佳等效因子下的发动机、ISG电机、驱动电机的功率分配,并进行仿真与硬件在环试验,其中仿真结果表明,与未优化的等效因子相比,燃油经济性提高20.81%,硬件在环试验结果与仿真结果基本一致,表明所制定能量管理策略的有效性和可行性,进而为解决不同的行驶里程PHEV功率分配策略提供理论基础。
基金Project(50878082)supported by the National Natural Science Foundation of ChinaProject(2012C21058)supported by the Public Welfare Technology Application Research of Zhejiang Province,China
文摘A local improvement procedure based on tabu search(TS) was incorporated into a basic genetic algorithm(GA) and a global optimal algorithm,i.e.,hybrid genetic algorithm(HGA) approach was used to search the circular and noncircular slip surfaces associated with their minimum safety factors.The slope safety factors of circular and noncircular critical slip surfaces were calculated by the simplified Bishop method and an improved Morgenstern-Price method which can be conveniently programmed,respectively.Comparisons with other methods were made which indicate the high efficiency and accuracy of the HGA approach.The HGA approach was used to calculate one case example and the results demonstrated its applicability to practical engineering.
