纯电动物流车动力系统参数匹配优化与驱动控制策略研究

发布时间：2019-01-08 20:28

【摘要】：纯电动物流车动力参数的匹配及优化的发展越来越受到重视,其驱动系统的合理匹配以及传动系统传动比的优化,是改善整车动力性及经济性的关键方法。驱动控制策略作为纯电动物流车整车的核心,直接关系到车辆经济性、动力性、安全性等方面的表现,是纯电动物流车各部件协同运作和高效运行的保障。本文针对纯电动物流试验车单次充电后续驶里程短,驱动控制策略不完善等问题进行研究。基于两挡变速器具有改善纯电动汽车经济性的作用,为试验车的传动系进行两挡变速器匹配,并完成对传动系传动比的优化;同时根据试验车实际使用特点,完善驱动控制策略。首先,在AVL-CRUISE软件中依据试验物流车的结构布置形式建立整车模型,根据试验车中各部件技术参数设置各部件模型中的关键参数,同时对整车加速性能、最高车速、最大爬坡度和续驶里程等性能进行了仿真分析。将仿真结果与样车试验获得的动力性和经济性结果进行对比,验证模型的准确性。其次为改善纯电动物流车的经济性,在原车基础上为纯电动物流车匹配一个两挡变速器。通过Isight集成AVL-CRUISE对传动系传动比进行优化,获得优化结果。将基于相关参数优化后的AVL-CRUISE整车模型进行仿真计算,验证其经济性的改善。最后结合纯电动物流车的实际使用特点,对纯电动物流车的驱动控制策略进行了研究,包括行驶控制策略、制动能量回收控制策略、起步控制策略,并在MATLAB/Simulink中建立了驱动控制策略模型,与AVL-CRUISE软件联合仿真进行驱动控制策略的实现,得出车辆的性能曲线图和相关信息,对提出的驱动控制策略进行了验证。
[Abstract]:More and more attention has been paid to the development of matching and optimizing the power parameters of pure electric logistics vehicles. The reasonable matching of driving system and the optimization of transmission ratio of transmission system are the key methods to improve the power performance and economy of the whole vehicle. As the core of pure electric logistics vehicle, drive control strategy is directly related to the performance of vehicle economy, power performance, safety and so on. It is the guarantee of cooperative and efficient operation of all parts of pure electric logistics vehicle. In this paper, the following driving mileage is short and the driving control strategy is not perfect. Based on the fact that the two-gear transmission can improve the economy of the pure electric vehicle, the transmission system of the test vehicle is matched and the transmission ratio of the transmission system is optimized. At the same time, according to the actual characteristics of the test car, the driving control strategy is improved. First of all, in AVL-CRUISE software, the vehicle model is established according to the structure layout of the test logistics vehicle, and the key parameters of each component model are set according to the technical parameters of each component in the test vehicle. At the same time, the acceleration performance and the maximum speed of the whole vehicle are obtained. The performance of maximum climbing slope and driving mileage were simulated and analyzed. The simulation results are compared with the dynamic and economical results obtained from the prototype test to verify the accuracy of the model. Secondly, in order to improve the economy of the pure electric logistics vehicle, the pure electric logistics vehicle is matched with a two-speed transmission on the basis of the original vehicle. The transmission ratio of transmission system is optimized by Isight integrated AVL-CRUISE, and the optimized results are obtained. The optimized AVL-CRUISE model based on related parameters is simulated and calculated to verify the improvement of its economy. Finally, the driving control strategy of pure electric logistics vehicle is studied, including driving control strategy, braking energy recovery control strategy, starting control strategy. The driving control strategy model is established in MATLAB/Simulink, and the driving control strategy is realized by the simulation of AVL-CRUISE software. The curve of vehicle performance and relevant information are obtained, and the proposed driving control strategy is verified.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U469.72

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