期刊 基于动态规划的电动商用车长下坡联合制动控制策略  

The long downhill combined braking control strategy of electric commercial vehicles based on dynamic programming

作  者:兰海潮 马宗钰 李学博 阙海霞 

LAN Haichao;MA Zongyu;LI Xuebo;QUE Haixia(School of Automobile, Chang′an University, Xi′an 710064, China)

机构地区:[1]长安大学汽车学院,陕西西安710064

出  处:《西北大学学报:自然科学版》2020年第6期987-995,共9页

The long downhill combined braking control strategy of electric commercial vehicles based on dynamic programming

基  金:陕西省重点产业创新链(群)项目(2020ZDLGY16-02);陕西省重点产业创新链(群)项目(2019ZDLGY15-01)。

摘  要:电动商用车在长大下坡路段行驶时,需要有一定的持续制动力来维持匀速下坡,然而随着坡长的增加,制动器摩擦升温,使制动效能高速下降,出现制动器热衰退现象,造成巨大的安全隐患。针对上述问题,该文针对装有电涡流缓速器的电动商用车进行制动策略研究,对总需求制动力进行二次分配。首先,利用遗传算法优化的模糊控制器确定电机所提供的制动力;再以制动器温升最低为目标,基于动态规划法提出联合制动策略,对电涡流缓速器制动力矩和制动器制动力矩进行分配;最后,在Matlab/Simulink平台进行了定坡度和变坡度道路仿真实验。结果表明,该文所提的控制策略可以有效地延长缓速器的工作时间,从而降低制动器温升。

Electric commercial vehicles need to have a certain amount of continuous braking force to maintain a constant speed when they are running on long downhill sections.However,as the slope length increases,brake friction heats up,which makes the brake efficiency decline and causes the problem of brake thermal fade,causing huge safety risks.Aiming at solving this problem,this paper puts forward a study on motor braking,mechanical braking and continuous braking control strategy for electric commercial vehicles equipped with eddy current retarder,and makes a secondary distribution of braking power for total demand.A fuzzy controller optimized by genetic algorithm is used to determine the braking force provided by the motor,and then a combined braking strategy is proposed based on dynamic programming to allocate the braking torque of eddy current retarder and the mechanical braking torque,aiming at the lowest brake temperature rise.At last,the simulation experiment of fixed slope and variable slope was carried out on Matlab/Simulink platform.The results show that the control strategy can effectively prolong the working time of the retarder and reduce the temperature rise of the brake.

关 键 词:电动商用车 电涡流缓速器 遗传算法 模糊控制 动态规划法 

electric commercial vehicles eddy current retarder genetic algorithm fuzzy control dynamic programming 

分 类 号:U463.53[机械工程—车辆工程]

 

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