signal fault

Design on general architecture of Railway Signal Fault Diagnose Expert System

铁路信号故障诊断专家系统基本结构设计

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In the input enter the square wave, sine wave, triangle wave signal excitation, feed-side to collect different fault information, in particular the input sine wave excitation, and its most obvious fault features can be more easily collected current fault information.

输入端分别输入方波、正弦波、三角波等信号激励，馈电端能采集到不同的故障信息，特别是输入正弦波激励，其故障特征最为明显，能更容易采集到电流故障信息。

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Then build a model of single and three-phase hybrid distribution system based on MATLAB, and research the case of line selection and the method of fixing fault segment with DC signal and fault position with AC signal by simulation.

基于MATLAB搭建了单三相混合配电系统模型，对接地选线情况和直流定段、交流定点方法做仿真研究。

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Research on the Analysis Method of Cyclostationary Fault Signal of Machinery

周期平稳类机械故障信号分析方法研究

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Fast Fault Signal Identification Method Using Line Current Slope

根据线路电流斜率快速识别故障信号的方法

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Writer discusses the management system for station signal equipment based on GIS, and provides the system of fault diagnosis and information positioning for station signal equipment.

作者设计了基于GIS的车站信号设备管理系统，并在此基础上提出了信号设备的故障诊断与信息定位系统。

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In this way, the wattless power of the test signal at the head spot of the fault is only needed to sample when the system fault occurs, which simplifies the measurement.

这样，当系统发生故障时，只需采集故障首端测试信号的无功功率，大大地简化了测量的方法。

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Frequency Domain Character of Power System Transient Fault Signal

电力系统暂态信号频谱特征的仿真研究

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New feature extraction method for weak fault signal based on improved fourier transform

一种基于改进的傅里叶变换的弱故障信号特征提取新方法研究

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Vibration fault feature of gear and rolling axletree is analyzed. By using the decomposition and reconstruction algorithm of wavelet transform, the fault feature signal of gear and rolling axletree are extracted availably and the results of experimentation are obtained.

分析了齿轮与滚动轴承故障振动信号的特征，利用小波变换的分解和重构算法，有效地提取出齿轮与滚动轴承故障特征信号，得到实验结果。

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Study on the Algorithm of Wavelet and Digital Filter in Fault Signal Processing

小波及数字滤波器在故障信号处理中的技术研究

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