考虑坡度工况的混合动力系统多目标优化策略研究
Research on multi-objective optimization strategy for hybrid power system considering slope conditions
郑清香 1寇桂岳 2黄强 3茶映鹏2
作者信息
- 1. 黎明职业大学信息与电子工程学院,福建泉州 362000
- 2. 南昌工程学院机械工程学院,江西南昌 330000
- 3. 福州大学机械工程及自动化学院,福建福州 350002
- 折叠
摘要
为了优化上坡工况下的车辆性能,提出了一种考虑坡度工况的混合动力系统多目标优化策略.利用电机对转矩快速准确的响应特性,引入电机转矩优化系数作为控制变量,采用NSGA-II算法实现平顺性与经济性的权衡优化.在Matlab/simulink平台上搭建整车模型,并在坡度工况下进行仿真试验,发现在坡度为5%的工况下,优化前的最大冲击度为19.6 m·s-3,优化后的最大冲击度为10.6 m·s-3,降低了45.91%;优化前的等效燃油消耗为0.5688 L,优化后的等效燃油消耗为0.6087 L,增加了7.01%.上述结果表明优化后的混合动力系统尽管经济性略有降低,但平顺性得到了大幅提高,验证了考虑坡度工况的混合动力系统多目标优化策略的有效性.
Abstract
In order to optimize vehicle performance in slope conditions,a multi-objective optimization strategy for hybrid power system considering slope conditions was proposed in this paper.To solve the torque instability problem caused by en-gine response lag and demand torque fluctuation in the climbing process,the motor torque optimization coefficient was intro-duced as the control variable by using the fast and accurate response characteristics of the motor to the torque,and the NS-GA-II algorithm was adopted to realize the trade-off optimization of ride comfort and economy.The vehicle model was built on the Matlab/simulink platform,and the simulation verification was carried out under the slope condition.The results show that under the working condition of a slope of 5%,the maximum jerk without optimization is 19.6 m·s-3,and the maxi-mum jerk after optimization is10.6 m·s-3,which decreases by45.91%.The equivalent fuel consumption without optimi-zation is 0.5688 L,while the equivalent fuel consumption after optimization is 0.6087 L,which increases by 7.01%.The a-bove results indicate that the stability of the optimized hybrid system has been greatly improved,while the economy has only slightly decreased,thus verifying the effectiveness of the multi-objective optimization strategy for the hybrid system consider-ing slope conditions.
关键词
混合动力系统/经济性/平顺性/多目标优化/等效燃油消耗/坡度工况Key words
hybrid power system/economy/stability/multi-objective optimization/equivalent fuel consumption/slope condi-tions引用本文复制引用
基金项目
福建省中青年教师教育科研项目(JAT201314)
黎明职业大学校级一般课题(LT202117)
江西省教育厅科学技术研究项目(GJJ211912)
江西省教育厅科学技术研究项目(GJJ211911)
南昌工程学院校级教学改革项目(2021JG011)
出版年
2024
国家科技期刊平台
NSTL
万方数据