Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into batter...Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into battery. The problem on how to distribute braking forces of front wheel and rear wheel for electric vehicles with four-wheel drive was more complex than that for electric vehicles with front-wheel drive or rear-wheel drive. In this work, the frictional braking forces distribution curve of front wheel and rear wheel is determined by optimizing the braking force distribution curve of hydraulic proportional-adjustable valve, and then the safety brake range is obtained correspondingly. A new braking force distribution strategy based on regenerative braking strength continuity is proposed to solve the braking force distribution problem for electric vehicles with four-wheel drive. Highway fuel economy test(HWFET) driving condition is used to provide the speed signals, the braking force equations of front wheel and rear wheel are expressed with linear equations. The feasibility, effectiveness, and practicality of the new braking force distribution strategy based on regenerative braking strength continuity are verified by regenerative braking strength simulation curve and braking force distribution simulation curves of front wheel and rear wheel. The proposed strategy is simple in structure, easy to be implemented and worthy being spread.展开更多
为解决复杂工况下分布式驱动电车(Distributed Drive Electric Vehicle,DDEV)的驱动防滑问题,基于模块化提出了一种多智能体分布式协同控制策略。首先,采用模块化的方法搭建了整车结构,将各轮毂电机车轮和控制器整体视为一个智能体,根...为解决复杂工况下分布式驱动电车(Distributed Drive Electric Vehicle,DDEV)的驱动防滑问题,基于模块化提出了一种多智能体分布式协同控制策略。首先,采用模块化的方法搭建了整车结构,将各轮毂电机车轮和控制器整体视为一个智能体,根据车轮运动学和整车运动学建立智能体的滑转率模型;然后,设计了基于多智能体的分布式模型预测控制策略,以多约束条件下的协同优化为目标函数,实现驱动防滑,在解决驱动力不足问题的同时,达到了低能耗和舒适性;最后,利用Simulink软件和CarSim软件进行仿真实验,实验结果证明了所提控制策略的有效性,为分布式驱动的进一步应用提供了新的控制方法。展开更多
基金Project(JS-102)supported by the National Key Science and Technological Program of China for Electric VehiclesProject supported by Jilin University "985 Project" Engineering Bionic Technology Innovation Platform,China
文摘Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into battery. The problem on how to distribute braking forces of front wheel and rear wheel for electric vehicles with four-wheel drive was more complex than that for electric vehicles with front-wheel drive or rear-wheel drive. In this work, the frictional braking forces distribution curve of front wheel and rear wheel is determined by optimizing the braking force distribution curve of hydraulic proportional-adjustable valve, and then the safety brake range is obtained correspondingly. A new braking force distribution strategy based on regenerative braking strength continuity is proposed to solve the braking force distribution problem for electric vehicles with four-wheel drive. Highway fuel economy test(HWFET) driving condition is used to provide the speed signals, the braking force equations of front wheel and rear wheel are expressed with linear equations. The feasibility, effectiveness, and practicality of the new braking force distribution strategy based on regenerative braking strength continuity are verified by regenerative braking strength simulation curve and braking force distribution simulation curves of front wheel and rear wheel. The proposed strategy is simple in structure, easy to be implemented and worthy being spread.
文摘为解决复杂工况下分布式驱动电车(Distributed Drive Electric Vehicle,DDEV)的驱动防滑问题,基于模块化提出了一种多智能体分布式协同控制策略。首先,采用模块化的方法搭建了整车结构,将各轮毂电机车轮和控制器整体视为一个智能体,根据车轮运动学和整车运动学建立智能体的滑转率模型;然后,设计了基于多智能体的分布式模型预测控制策略,以多约束条件下的协同优化为目标函数,实现驱动防滑,在解决驱动力不足问题的同时,达到了低能耗和舒适性;最后,利用Simulink软件和CarSim软件进行仿真实验,实验结果证明了所提控制策略的有效性,为分布式驱动的进一步应用提供了新的控制方法。
