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以6 t液压挖掘机动臂为研究对象,提出伺服电机驱动定量泵的流量匹配控制系统。在Simulation X中搭建伺服电机仿真模型,通过与伺服电机响应特性试验结果对比,验证伺服电机模型的准确性;建立液压挖掘机动臂机械结构多体动力学与电液系统的联合仿真模型,仿真分析了不同控制方式下,动臂的运行特性和能耗特性。结果表明,与负载独立流量分配(LUDV)系统相比,采用伺服电机驱动定量泵流量匹配控制的动臂能耗降低约13.6%。
Taking the 6 t hydraulic excavator boom as the research object, a flow matching control system of the servo motor driven dosing pump is proposed. The simulation model of servo motor is set up in Simulation X. The accuracy of servo motor model is verified by comparing with the servo motor response characteristic test. The co-simulation model of multi-body dynamics and electrohydraulic system of hydraulic excavator boom mechanical structure is established. The running characteristics and energy consumption characteristics of boom are analyzed under different control modes. The results show that the power consumption of the boom with servo motor-driven dosing pump flow matching control is reduced by about 13.6% compared with the LUDV system.