针对目前电动汽车由于蓄电池寿命和续航里程短导致其不能普及的现状,加入超级电容和DC/DC变换器构成复合储能系统,分析了汽车的运行状态,提出了一种改进的逻辑门限控制方法对复合储能系统进行能量控制。利用AVL CRUISE软件建立了整车模...针对目前电动汽车由于蓄电池寿命和续航里程短导致其不能普及的现状,加入超级电容和DC/DC变换器构成复合储能系统,分析了汽车的运行状态,提出了一种改进的逻辑门限控制方法对复合储能系统进行能量控制。利用AVL CRUISE软件建立了整车模型,对能量控制策略进行了城市工况下的仿真验证。以48 V 5 k W的直流无刷电机及其控制器HPC300为载体,搭建了复合储能单元和其控制系统,仿真和实验结果表明该复合储能系统及其控制策略能够避免蓄电池的大电流输出和冲击,提高蓄电池的使用寿命和汽车的续航里程。展开更多
The coaxial compound helicopter has two possible strategies for heading control: collective differential and rudder deflection. A flight dynamics model is developed to assess the effect of different heading control st...The coaxial compound helicopter has two possible strategies for heading control: collective differential and rudder deflection. A flight dynamics model is developed to assess the effect of different heading control strategies. This includes the trim characteristics, steady flight performance,controllability, and manoeuvrability. The trim study demonstrates that heading control strategies are less influential on trim results, and the steady flight performance is also not significantly affected by the heading control strategy adopted. The controllability analysis shows although heading bandwidth and phase delay results at various speeds with different heading control strategies are all satisfied, the control derivative of the collective differential decreases as speed increases, and its heading aggressive agility is degraded into Level 3 in high-speed flight. In addition, using collective differential would lead to severe heading-rolling coupling as forward speed increases. On the contrary, the control derivative and aggressive agility of the rudder deflection is improved with forward speed, and there is no evidence of heading-rolling coupling. Finally, the transient turn MissionTask-Element(MTE) is utilized to investigate the heading manoeuvre characteristics in different heading control strategies, which indicates that the collective differential would add the amplitude of control input and the power consumption during this MTE.展开更多
文摘针对目前电动汽车由于蓄电池寿命和续航里程短导致其不能普及的现状,加入超级电容和DC/DC变换器构成复合储能系统,分析了汽车的运行状态,提出了一种改进的逻辑门限控制方法对复合储能系统进行能量控制。利用AVL CRUISE软件建立了整车模型,对能量控制策略进行了城市工况下的仿真验证。以48 V 5 k W的直流无刷电机及其控制器HPC300为载体,搭建了复合储能单元和其控制系统,仿真和实验结果表明该复合储能系统及其控制策略能够避免蓄电池的大电流输出和冲击,提高蓄电池的使用寿命和汽车的续航里程。
基金supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions of China, the program of China Scholarships Council (No. 201706830016)the National Natural Science Foundation of China (No. 11672128)
文摘The coaxial compound helicopter has two possible strategies for heading control: collective differential and rudder deflection. A flight dynamics model is developed to assess the effect of different heading control strategies. This includes the trim characteristics, steady flight performance,controllability, and manoeuvrability. The trim study demonstrates that heading control strategies are less influential on trim results, and the steady flight performance is also not significantly affected by the heading control strategy adopted. The controllability analysis shows although heading bandwidth and phase delay results at various speeds with different heading control strategies are all satisfied, the control derivative of the collective differential decreases as speed increases, and its heading aggressive agility is degraded into Level 3 in high-speed flight. In addition, using collective differential would lead to severe heading-rolling coupling as forward speed increases. On the contrary, the control derivative and aggressive agility of the rudder deflection is improved with forward speed, and there is no evidence of heading-rolling coupling. Finally, the transient turn MissionTask-Element(MTE) is utilized to investigate the heading manoeuvre characteristics in different heading control strategies, which indicates that the collective differential would add the amplitude of control input and the power consumption during this MTE.
