摘要
通过分析传统混合动力液压挖掘机动力结构及工况模式,确定了内燃机高油耗区域。以并联混合动力系统为基础,提出了基于主动识别工况模式的自适应调整动态最佳混合度的优化控制策略。该控制策略建立了四级动态最佳混合度,通过分工况控制,自适应功率匹配,使内燃机始终工作在最佳经济点附近。以MATLAB/Simulink软件为基础,建立了基于优化控制策略和传统混合动力挖掘机的内燃机扭矩、油耗等模型并进行仿真。仿真试验结果表明,与传统混合动力挖掘机相比,基于该优化控制策略的混合动力系统能进一步提高燃油效率,达到更好的节能效果。
Power path and load mode of the traditional hybrid hydraulic excavator is analyzed, and then the high fuel consumption ar- ea of the engine is found. An optimal control strategy of adaptively adjusting the dynamic optimal DOH （degree of hybridization） by actively recognizing the load mode is propounded based on parallel hybrid system. Under this optimal control strategy, the dynamic optimal hybridization is divided into four grades and the engine is always made working around the optimal economical area by multi- conditions control and adaptive power match. The fuel consumption and torque models of the engine in hybrid excavator with the opti- mal control strategy and traditional hybrid vehicle are established and simulated by MATLAB/Simulink. The simulation results indicate that, under this strategy, the fuel consumption is reduced and the energy is saved more efficiently in the hybrid system.
出处
《机械制造与自动化》
2013年第3期180-183,共4页
Machine Building & Automation
关键词
液压挖掘机
混合动力
控制策略
建模仿真
hydraulic excavator
hybrid power
control strategy
modeling and simulation
