摘要
针对负载敏感泵参数辨识问题,提出一种基于系统辨识和理论计算相结合的负载敏感泵参数计算方法。该方法首先使用阶跃响应辨识法根据变量泵阶跃信号测试数据辨识出负载敏感泵增益、固有频率和阻尼,然后结合变量泵设计公式确定变量缸等效质量、弹簧刚度及预紧力等参数。仿真结果表明,用该方法得到的变量泵参数能够真实再现变量泵各个工作状态特性。该方法对负载敏感系统建模分析和系统设计匹配具有重要意义。
A parameter identification method for load-sensing variable pump is proposed based on system identifica- tion and theoretical calculation. Firstly, the step response identification method is utilized to identify the gain, nat- ural frequency and damp of pump by the test data. Then, the equivalent mass, stiffness and preload of modulating cylinder are determined by the design formula of variable pump. Simulation results of load sensing pump indicate that the parameters identified by the method can exactly reproduce each operation characteristics of load-sensing pump. The method can be used in modeling and system analysis of load sensing system.
出处
《液压与气动》
北大核心
2017年第7期67-70,共4页
Chinese Hydraulics & Pneumatics
基金
山西省煤基重点科技攻关项目(MJ2014-03)
山西省青年科技研究基金(2015021127)
关键词
负载敏感
参数辨识
阶跃响应辨识
load-sensing, parameter identification, step response identification
