摘要
为提高电动汽车能量利用率,需对制动能量进行回收.分别建立了驾驶员制动意图模糊识别模型和制动器摩擦片的热力学模型.采用模糊推理的方法识别了驾驶员的制动意图,以制动强度大小作为模糊控制器的输出.基于ECE曲线、I曲线和f线对前后轴制动力进行分配,保证了制动的稳定性.采用有限差分法分析了制动过程中摩擦片的温度变化,进而提出电机制动力补偿算法对制动器热衰退进行补偿.仿真结果表明,考虑热衰退的制动能量回收控制策略不仅提高了制动效能,同时使制动能量回收率得到有效提升.
To improve energy utilization ratio of EVs,braking energy should be recycled.The model of braking intention identification and the thermal model of braking pad are established.The braking intention is identified by fuzzy control method and the severity of braking is used to describe the braking intention.To ensure the stability of braking,the distribution of braking force is based on ECE line,I curve and f curve.The temperature of braking pad is estimated by finite difference method and then the motor braking force compensation algorithm is put forward.The simulation results show that the cooperative control for friction and regenerative braking system considering heat fade can not only improve the energy regeneration ratio,but also make the braking process more stable.
出处
《武汉理工大学学报（交通科学与工程版）》
2017年第1期146-150,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家科技支撑计划项目资助(2015BAG08B02)
