Results 81 to 90 of about 4,012 (150)
Fault Detection and Diagnosis on Bioler System [PDF]
, 2009 仪表及控制系统的可靠性直接影响到现代化工业生产装置安全、稳定运行。仪表误报是造成工厂频繁停车及意外事故的一个重要原素。本文研究了基于模糊逻辑的故障检测诊断系统在锅炉上的运用，阐述了模糊逻辑的隶属度求取、模糊规则以及故障变量估计值求取的原理和方法。采用SimACS建立高压燃油锅炉系统工厂仿真模型，构建通过OPCserver传输仿真工厂数据网络，并采用基于模糊逻辑故障检测诊断方法的！&*#*￥™IV软件结合锅炉基本工艺知识对锅炉仪表在线进行故障检测与诊断测试。以锅炉饲水量和除氧器出水温度为例 ...
邱赘子
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Gaoya dianqi, 2011 笔者提出了基于故障树分析法处理断路器液压机构泄漏故障的诊断方法,通过对这一方法的不断应用探索和在实践中完善,使这种方法具有诊断断路器液压机构泄漏故障的普遍意义。
洪国耀, 张猛, 陈保伦
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The Exploration of Intelligent Fault Diagnosis based on outlier [PDF]
, 2007 随着现代科学技术的飞速发展，工程设备日趋复杂，现代化的工业系统不断朝着大规模、复杂化、集成化方向发展，自动化程度也越来越高，设备运行的安全性和可靠性也越来越受到人们的重视；与此同时，由于设备结构的复杂性以及高负荷连续运转，所以随着时间的增长和内外部条件的变化，不可避免地会发生故障。这类系统一旦发生故障，轻则降低设备性能，影响生产，重则停机停产，毁坏设备，更甚者机毁人亡，不仅将会造成人员和财产的巨大损失，而且对生态环境也将会造成不可挽回的影响。在过去30年里，传统故障诊断技术得到了快速的发展 ...
郧刚
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Research on Fault Diagnosis Method of Photovoltaic Arrays Based on Improved Grey Wolf Algorithm Optimized Extreme Learning Machine [PDF]
ObjectivesPhotovoltaic arrays operating under complex outdoor conditions encounter various fault types with varying degrees of severity. To accurately assess the working status of photovoltaic arrays, a fault diagnosis method based on an improved grey ...
HAN Maolin +4 more
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Gaoya dianqi, 2018 电力变压器绕组故障诊断是保证电力变压器安全运行的关键技术。文中通过建立变压器有限元模型和高频等值电路模型,提出了基于"结构参数—电气参数—试验结果"诊断思路的变压器绕组故障诊断方法,可以有效提高电力变压器绕组故障诊断的可靠性。文中基于Ansoft Maxwell仿真平台建立变压器三维有限元模型,计算了变压器主要电气参数（对地电容、饼间电容等）,分析了不同故障类型及故障程度下电气参数的变化。运用求解的电气参数搭建了高频等值电路模型,并由高频等值电路模型仿真对应试验结果。文中以轴向位移故障为例 ...
鲁非 +5 more
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Marine motor fault diagnosis based on CEEMDAN and BRECAN under strong noise conditions [PDF]
ObjectiveThe background noise in the engine room during actual ship navigation leads to the poor accuracy in fault diagnosis methods. To address this issue, this paper proposes a ship motor fault diagnosis method based on complementary ensemble empirical
Chong YAO +3 more
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The Research on Circuit Malfunction Orientation of Malfunction Dictionary in Servo System [PDF]
, 2006 本文介绍了故障字典法特征,并针对其在某装备系统中的电路故障定位研究为例详细做了介绍,由此来分析其在故障定位中的优缺点。This text is to introduce the character of malfunction dictionary.And introduce it detailedly with the example of research on circuit malfunction orientation in servo system to analyze the ...
刘锐, 姚世锋, 蔡继军, 薛德庆
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Fault diagnosis method of rolling bearing of mine main fan based on transfer learning [PDF]
The condition monitoring and fault diagnosis of the rolling bearings of the main fan in the mine are significant to the safety of coal mine production. The existing fault diagnosis methods of rolling bearing have the problems of insufficient training and
Guoying MENG, Wei CUI, Xingwei WAN
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The fractal features of bi-spectral slices applied in fault diagnosis [PDF]
, 2012 减压阀是液压系统中的一种重要元件,也很容易发生故障,如何对减压阀发生的故障进行诊断,对于机械系统的维护有着重要意义。首先获取了减压阀振动时的正常信号和故障信号的Ar双谱切片,再根据双谱切片所呈现出的自相似性,分别计算了每组数据的容量维数,并由计算结果进行故障诊断,取得了良好效果。Relief valve is an important component of a hydraulic system,and it is easy to go wrong.How to diagnose the faults
吴文兵, 黄宜坚
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Gaoya dianqi, 2019 拒动是断路器最严重的故障类型之一,可能导致大面积停电事故,而近年来由于分合闸线圈故障导致拒动时有发生,诊断分合闸线圈的运行状态对于保障电网安全具有重要意义。文中以某型号SF6瓷柱式高压交流断路器中的分合闸线圈为研究对象,通过实验模拟电源电压跌落、供电回路接触不良、铁心卡涩、铁心空行程大这几种典型的故障类型,获取正常与故障条件下的分合闸线圈电流波形。进而采用支持向量机（SVM）算法对分合闸线圈故障进行诊断,特别是采用主成分分析法提取电流波形的特征参数作为诊断依据,实现了对故障的有效识别 ...
彭在兴 +9 more
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