基于典型作业工况的串联式电传动推土机功率跟随控制策略

发布时间：2018-10-20 16:29

【摘要】：为提高串联式混合动力推土机的燃油经济性,研究动力传动系统的能量分配策略。分析发动机和发电机的动态工作特性,通过台架试验建立发动机的动力输出特性模型、油耗特性模型和发电机的效率特性模型;通过超级电容的电阻串并联模型结构分析,建立超级电容的动态工作模型,设定荷电状态的安全工作范围。基于台架试验及模型获得的发动机最佳燃油消耗曲线,提出一种最佳燃油消耗曲线的功率跟随控制策略。研究推土机的典型作业工况,在典型作业工况下对提出的控制策略进行仿真,阐述超级电容的荷电状态及电压、电流的变化规律,并与传统机械传动结构的原型机在发动机工作转速、转矩、油耗和加速踏板位置变动等参数方面进行对比分析。结果表明,在推土机典型作业工况下,采用最佳燃油消耗曲线的功率跟随控制策略与原型机相比,节油率达13.1%。
[Abstract]:In order to improve the fuel economy of series hybrid bulldozer, the energy distribution strategy of power transmission system is studied. The dynamic working characteristics of engine and generator are analyzed, the dynamic output characteristic model, fuel consumption characteristic model and efficiency characteristic model of generator are established by bench test, and the structure analysis of resistance series and parallel connection model of super capacitor is carried out. The dynamic operation model of super capacitor is established, and the safe working range of charge state is set up. Based on the optimal fuel consumption curve obtained from the bench test and the model, a power following control strategy for the optimal fuel consumption curve is proposed. The typical working condition of bulldozer is studied, the control strategy is simulated under typical operation condition, and the charge state, voltage and current of super capacitor are expounded. The parameters of engine speed torque fuel consumption and acceleration pedal position are compared and analyzed with the traditional mechanical transmission prototype. The results show that under typical operation conditions of bulldozer, the power following control strategy using the optimal fuel consumption curve can save 13.1 percent of fuel compared with the prototype machine.
【作者单位】：北京理工大学电动车辆国家工程实验室;机械工业出版社;
【基金】：“十二五”国家科技支撑计划资助项目(2011BAG04B02)
【分类号】：TU623.5

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