摘要
基于某6 t级小型挖掘机,设计以超级电容作为储能元件的并联式混合动力系统,并给出动力系统各部件的参数。并联式混合动力挖掘机的动力系统是具有强非线性的双输入双输出耦合系统:输入为发动机加速踏板命令和启动发电一体机(Integrated starter generator,ISG)转矩命令,输出为发动机转速和超级电容的电荷状态(State of charge,SOC)。在Matlab/Simulink中对动力系统建模,并提出3种控制策略进行仿真。仿真结果表明,使用发动机加速踏板命令和ISG转矩命令耦合控制发动机转速和超级电容SOC的'耦合控制策略'较优。另外,以某型6吨挖掘机为基础,制造一台混合动力挖掘机原型机,并且设计基于CAN网络的分布式控制系统,基于MPC561单片机自主开发一款32位整车控制器。实车试验的结果表明,耦合控制策略能够实现发动机转速波动在±100 r/min以内,超级电容SOC在循环间基本保持不变,发动机工作在相对高负荷低油耗工作区,系统综合节油率在15%左右。
A parallel hybrid power train system is designed based on a 6 t hydraulic excavator, and the specifications are introduced. The power train of a parallel hybrid excavator is a two-input-two-output system with engine torque and integrated starter generator （ISG） torque as inputs while engine speed and state of charge（SOC） of super capacitor as outputs. The model of the powertrain is built in Matlab/Simulink. Three control strategies are designed and simulated. The results show that the“coupling control strategy”is the best of the three. A 32-bit HCU is developed. A prototype hybrid excavator is built. Testing results show that the fluctuation of the engine speed is within ±100 r/min, and the SOC of super capacitor can be kept sustaining during work cycles. Compared with a traditional hydraulic excavator, the engine operates more efficiently, reducing fuel consumption by approximately 15%.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2014年第18期118-126,共9页
Journal of Mechanical Engineering
基金
国家高技术研究发展计划资助项目(863计划
20121867893)
关键词
挖掘机
并联混合动力
耦合控制
仿真
excavator
parallel hybrid
coupling control
simulation
