Results 41 to 50 of about 612 (102)
Gaoya dianqi, 2020 为进一步提高变压器机械故障智能诊断的准确性,文中基于变压器振动信号时间序列符号化的模式表征,提出了一种基于栈式自编码器的变压器机械故障诊断模型。首先对振动信号时间序列进行符号化模式表征和构建复杂网络,提取了基于度分布的变压器振动信号特征向量,据此构建了基于栈式自编码器（stacked auto encoder,SAE）的变压器机械故障诊断模型。对某10 k V干式变压器正常与典型机械故障下振动信号的分析结果表明,变压器振动信号时间序列的符号化模式表征及度分布能较好地表征其动力学特征 ...
解颖, 王丰华, 傅正财
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Adaptive zero velocity correction method for fiber optic inertial navigation system in coal mining roadheader [PDF]
The fusion positioning of high-precision fiber-optic inertial navigation and high-precision position sensor is an effective method to realize the accurate positioning of coal mine roadway roadheader.
Jianquan CHAI +5 more
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Shiyou jixie, 2015 针对转子振动信号非线性较强的特性，将多重分形理论引入到转子振动故障信号的特征提取与识别当中，系统介绍了小波变换模极大值求取多重分形谱及其参数的方法，且对该方法进行了改进，消除了振动噪声信号对多重分形计算过程的干扰，提高了计算结果的准确度；同时，提出了广义维数偏差因子的概念。通过试验证明，将多重分形谱参数与广义维数偏差因子相结合，可以实现转子正常振动信号、不对中故障振动信号以及不平衡故障振动信号的分离。研究内容为旋转机械转子部件的状态监测与故障诊断提供了一种新的方法。
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Gaoya dianqi, 2019 为进一步提高有载分接开关（on-load tap changer,OLTC）机械状态监测的准确性,文中基于递归定量分析（recurrence quantification analysis,RQA）法对OLTC切换过程中的振动信号进行了分析。首先应用相空间重构和递归图理论获取了OLTC切换过程中振动信号的递归图,然后引入递归率、层流性和确定性等递归定量指标及其统计分布结果对OLTC振动信号的动力学特征进行了描述。对某CM型组合式OLTC正常与典型故障下振动信号的分析结果表明 ...
樊家昊 +3 more
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Research on Dynamic Cable Fastening State Monitoring based on Distributed Acoustic Sensor Detection [PDF]
【Objective】The dynamic cable of the floating wind turbine in the deep sea enters the sea from the sea surface until it is buried on the seabed. The reliability of the dynamic cable is very important for the safe and stable operation of the floating wind ...
AN Bowen +5 more
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Field testing of an in-service wind turbine tower using a laser based remote sensing method [PDF]
, 2016 As a special slender structure,a wind turbine tower with a turbine on the top of the structure is sensitive to dynamic loading. Therefore,it is critical to accurately assess the vibrational behaviors of the wind turbine tower. To facilitate field testing
DAI Kao-shan, HUANG Yi-chao, WANG Ying
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Imprints of vibratory signals induced by road construction in strain and seismic records: A case study of Yichang station [PDF]
One of the crucial issues in the field of earthquake forecasting and prediction is the reasonable identification of the tilt, strain, and seismic signals induced by road construction.
Xiaolin Yang
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Gaoya dianqi, 1997 研究了基于高压断路器振动信号的分析对断路器的机械故障进行诊断的方法,其中对振动信号的分析采用小波分析。研究表明,小波分析在断路器机械振动信号的分析中优于传统的Fourier分析,并在机械故障诊断方面有显著的效果。
张伟政, 杨兰均, 张文元
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Gaoya dianqi, 2022 机械故障是断路器发生的主要故障之一，断路器分合闸过程中产生的振动信号可以有效反应其运行状态。针对现有的时频域分析等线性分析方法在提取断路器振动信号时存在的局限性，提出并探讨了一种基于相空间重构的断路器振动信号边缘特征提取方法，用于刻画断路器的非线性特征，为断路器的状态诊断提供依据。搭建故障模拟平台模拟断路器正常状态、触头磨损、线圈老化、低操作电压、合闸弹簧失效的振动信号；结合分形理论和边缘检测算法提取振动信号的边缘图像和边缘特征量，从边缘图像形态 ...
盛健 +6 more
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