机电液系统动能刚度图示化在线识别技术

杨彬1,谷立臣1,2,刘永1,3

振动与冲击 ›› 2017, Vol. 36 ›› Issue (4) : 119-126.

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (4) : 119-126.
论文

机电液系统动能刚度图示化在线识别技术

  • 杨彬1,谷立臣1,2,刘永1,3
作者信息 +

A graphical technique of kinetic energy stiffness identification for mechanical electro-hydraulic system

  • YANG Bin1,GU Lichen1,2,LIU Yong1,3
Author information +
文章历史 +

摘要

为在线检测机电液系统动能刚度,评价动力源与负载之间的功率匹配特性,提出利用李萨如图进行信息融合的动能刚度图示化识别方法。首先根据电机拖动液压系统的动力学模型,分析了系统的节能原理、动能刚度的物理意义及其对机电液系统功率的影响机理。再结合信号调制与信息融合技术,将系统的转矩、转速以及压力、流量信号融合成李萨如图形,通过观察图形特征的变化可以实现对系统动能刚度的在线识别。理论与实验研究结果表明:机电液系统动能刚度的变化是参数相互耦合的结果,可用于衡量动能变化率,评价系统的节能效果;融合的李萨如图形倾角可量化动能刚度大小,倾角变化反应了动能刚度的变化规律,由此得到的刚度圆能够评价系统动力源与负载之间的功率匹配性与在线运行状态。

Abstract

In order to measure the kinetic energy stiffness and evaluate the power matching nature between the power source and the load,a graphical recognition method of dynamic stiffness was put forward based on information fusion using Lissajous pattern. Based on the analysis result of system modeling,the energy-saving principle of the system,physical significance of kinetic energy stiffness and its influence mechanism for the mechanical electro-hydraulic system were analyzed. By using the signal modulation and information fusion technology,the signal of torque,speed,press and flow were fused as Lissajous pattern,and the change of graphic feature could identify the dynamic stiffness on line. The results show that the change of kinetic energy stiffness is the result of intercoupling between mechanical electro-hydraulic parameters,which can be used to measure the changing rate of kinetic energy and evaluate the energy- saving effect of the system. The inclination of Lissajous pattern can characterize the kinetic energy stiffness and the value can be used to evaluate the power matching nature between the power source and the load and monitor the on-line running state.

关键词

机电液系统 / 动能刚度 / 功率匹配 / 图示化识别 / 信息融合

Key words

mechanical electro-hydraulic system / kinetic stiffness / power matching / graphical recognition / information fusion

引用本文

导出引用
杨彬1,谷立臣1,2,刘永1,3. 机电液系统动能刚度图示化在线识别技术[J]. 振动与冲击, 2017, 36(4): 119-126
YANG Bin1,GU Lichen1,2,LIU Yong1,3. A graphical technique of kinetic energy stiffness identification for mechanical electro-hydraulic system[J]. Journal of Vibration and Shock, 2017, 36(4): 119-126

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