摘要
为进一步提高制动能量回收率,考虑不同工况下驾驶员不同制动意图所需的制动效果,提出了一种四驱电动汽车制动控制策略。首先,针对常规制动工况,基于常规制动意图识别,从制动能量回收率、稳定性和安全性角度分别设计控制策略;其次,针对滑行工况下的不同滑行制动意图,判断电机制动力是否介入及何时介入,并根据驾驶员所需的滑行距离计算电机制动力的大小;然后,由台架试验获得前后电机外特性并建立前后电机最优利用效率模型;最后,利用Carsim和Simulink进行了联合仿真分析。仿真结果表明,在新欧洲驾驶循环(New European Driving Cycle,NEDC)工况下,与并联控制策略相比,能量回收率提升了13.64百分点;在滑行工况下可有效识别驾驶员需求滑行距离,提升了整车滑行经济性。
In order to improve the braking energy recovery rate,the braking effect required by drivers with different braking intentions under different working conditions is considered,and a braking control strategy of four-wheel-drive electric vehicles is proposed.Firstly,according to conventional braking conditions,control strategies are designed from the perspectives of braking energy recovery rate,stability and safety based on conventional braking intention recognition.Secondly,according to different coasting braking intentions under coasting conditions,whether and when the electric force intervenes are determined,and the size of the braking force from motors is calculated according to the driver's required coasting distance.Thirdly,the external characteristics of the front and rear motors are obtained by bench tests,and the optimal utilization efficiency model of the front and rear motors is established.Finally,Carsim and Simulink are used for co-simulation analysis.The results show that the braking energy recovery rate is improved by 13.64 percentage points compared with the parallel control strategy in new European driving cycle(NEDC)condition.It can effectively identify the driver's required coasting distance under coasting conditions and improve the vehicle's coasting economy.
作者
潘公宇
王学攀
Pan Gongyu;Wang Xuepan(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China)
出处
《机械传动》
北大核心
2024年第7期9-18,共10页
Journal of Mechanical Transmission
基金
国家自然科学基金项目(52072157)。
关键词
四驱电动汽车
制动意图识别
双电机外特性
再生制动
控制策略
Four-wheel-drive electric vehicle
Braking intention recognition
Dualmotor external characteristics
Braking energy recovery
Control strategy
