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数据驱动的液压系统早期微小泄漏检测与定位方法

         

摘要

泄漏是引起液压系统失效最主要的原因,泄漏的精确诊断与定位对保障液压系统的正常运行具有重要意义。在泄漏发生早期,液压系统的压力信号没有明显变化,压力传感器难以对其进行监测。同时,系统的压力受到负载及开关状态改变而变化,这将导致传感器信号变化剧烈而进一步加剧泄漏检测与定位难度。本文提出了一种数据驱动的液压系统早期微小泄漏检测与定位方法,利用小波变化对信号进行降噪处理,建立基于Bayesian网络的泄漏检测与定位模型进行泄漏检测,通过归一化模型将不同压力下声发射信号特征值转化为目标压力下声发射信号特征值,以提高压力鲁棒性。该方法在实验室的液压系统上得到了验证。

著录项

  • 来源
    《中南大学学报》 |2021年第5期|P.1390-1401|共12页
  • 作者单位

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

    National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum Qingdao 266580 ChinaCollege of Mechanical and Electronic Engineering China University of Petroleum Qingdao 266580 China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 计算技术、计算机技术;
  • 关键词

    早期微小泄漏定位; 归一化模型; 液压系统; 贝叶斯网络;

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