液压挖掘机混合动力系统的参数匹配方法

为了提高液压挖掘机混合动力系统的效率,提出了一种对其动力系统进行优化的参数匹配方法.分析了液压挖掘机混合动力系统的结构、工况及其控制策略,从而确立基于优化目标函数和约束条件函数的参数匹配方法.利用该匹配方法对混合动力系统中发动机、电动机、发电机和电容器等主要元件进行了参数匹配,在所建立的混合动力液压挖掘机模型上对匹配结果进行了分析.结果表明:进行参数匹配后系统的效率有了显著提高,并且主要元件均满足工况的要求.

Parameter Matching Method for Hybrid Power System of Hydraulic Excavator

In order to improve the efficiency of hybrid power system applied in hydraulic excavator, a parameter matching method was developed to optimize the power system. Structure, working condition and control strategy of the hybrid power system applied in hydraulic excavator were analyzed. Then, a parameter matching method based on optimization object functions and constraint condition functions was proposed. The parameters of the main components, such as engine, electric motor, generator and capacitor of the power system were matched using this method. The matching results were analyzed using the built hybrid power hydraulic excavator model. The results show that the system efficiency is improved significantly after parameter is matched and the main components meet the demand of working condition.