针对无人机故障诊断前故障特征提取的问题进行了分析。
In this article, the issue of extraction of fault features in UAV is analyzed.
利用倒谱包络方法解决液压泵轴承故障特征提取和故障诊断的问题。
The cepstrum envelope analysis is applied to solve the problem of the diagnosis of bearing failure to hydraulic pump.
研究了基于高阶谱（主要是三阶谱）和主元分析的故障特征提取方法。
The extracting fault features approach based on high-order spectral for pump valves of reciprocating pump was investigated, especially third order spectral analysis.
因振动筛支撑大梁结构特点，其状态信号的拾取和裂纹故障特征提取困难。
Because of the girder's structure, it is very difficult to obtain its status signal and extract its crack fault feature.
针对感应电动机轴承故障特征提取的不足，提出了瞬时功率小波包分解的方法。
To solve the problem in obtaining bearing fault characteristics of induction motors, a method based on instantaneous power decomposition via wavelet packet is put forward.
在时域和频域中给出了基于响应曲线波形有效点的模拟电路故障特征提取方法。
The feature extraction method based on efficient points of response curve is studied in time domain and frequency domain.
在电子设备故障诊断中，波形识别是进行故障特征提取和故障诊断的重要依据。
In electronic equipment fault diagnosis, waveform identification is an important basis of features extraction and fault diagnosis.
由于局域波时频谱可以表示为灰度图像。因此，利用图像信息的不变矩进行故障特征提取。
Because the Local wave T-F spectrum can be showed in the gray image, so we use the moment invariants of time-frequency image as the fault features.
在齿轮故障监测与诊断中，故障特征提取是诊断的关键，而特征提取的方法也是多种多样的。
During the gear fault detection and diagnosis, the fault feature extraction is the key of diagnosis, but it is multifarious for the method of fault feature extraction.
识别结果表明，该方法克服了传统方法在故障特征提取和识别上的局限性，能够有效地识别出往复压缩机的各种故障。
The identification result shows that this method surmounts localization of traditional method, and could identify kinds of compressor fault exactly.
对加速度进行特征提取，可以使得波形的幅度特征更加明显，有利于进行轨道故障的检测。
The waveforms 'amplitude character will be more distinct through accelerations 'feature extraction, and this is propitious to rail deformation detection.
本文提出一种基于多门限特征提取的轨道故障检测算法。
A rail deformation detection algorithm based on multi-threshold feature extraction was presented in this paper.
WVD很高的能量聚集性和很好的时频分辨率，极大地提高了故障信号特征提取的准确度。
Due to high temporal and frequency resolution and high energy focus, the accuracy of fault signal feature extraction is greatly improved by WVD.
必须建立电能质量检测和分析系统，实现对各种电能质量问题的故障定位和特征提取。
It is necessary to set up power quality monitor and analysis system, which can realize fault location and character extraction to all power quality disturbances.
在机电设备的故障诊断中，特征提取是最重要也是最困难的一个环节。
The feature extracting is an important, difficult step in the fault diagnosis processing.
信号分析被广泛用于消噪、特征提取、状态识别、故障诊断等。
Signal processing algorithms have been broadly used for cancelling noise, extracting feature, identifying status and diagnosing malfunction.
对信号进行特征提取，是故障诊断的关键。
Withdrawing the signal characteristic is a key to fault diagnosis.
试验证明径向高斯核函数时频分布在故障诊断中有较强的特征提取作用。
The experiments are presented to show the RGK TFD has superior character extracting ability than the traditional fixed kernel TFD that is often used in fault diagnosis.
在机器状态监测和故障诊断中，特征提取是一个非常重要的问题。
In mechanical condition monitoring and fault diagnosis, feature extraction is the most important issue.
结果表明，该特征提取方案可以在一定程度上提高了故障特征的区分度。
The results show that the new feature extraction programs can be improved to some extent, distinguish between degrees of fault characteristics.
对存储的数据可在时域、频域、幅值域进行特征提取、趋势分析以判定故障的位置与性质。
It also can process the stored data in time-domain, frequency-domain and amplitude-domain so as to extract signature, analyze trend and locate the fault.
故障诊断包括信号采集、信号分析、特征提取、诊断决策等环节。
Fault diagnosis includes data collection, signal analysis, feature extraction and decision making.
在应用本文所采用的几种信号特征提取方法的基础上，结合2d -HMM模型，验证了基于2d - HMM的离心泵故障诊断方法的有效性。
This paper verified the effectiveness of the fault diagnosis method based on 2d-hmm for centrifugal pump, by applying several signal feature extraction methods combining 2d-hmm model.
本文以滚动轴承为研究对象，应用新理论，提出轴承故障信号特征提取的新方法。
This paper goes on the rolling bearing as the research object, researching the new theories and methods of bearing fault signal feature extraction.
论述了延时嵌入相空间重构方法及其伪相图的获取技术，将这一方法用于大机组非线性故障的定性特征提取。
The theory of phase space reconstruction with time delay embedding is explained comprehensively in this paper, and used to extract qualitative features of nonlinear fault in large rotating machinery.
大型电力变压器局部放电信号的特征提取是电气设备绝缘在线监测及故障诊断技术领域的前沿研究课题。
The feature extraction of partial discharge signal of transformer is the front research project in online monitoring and diagnosing high voltage insulation failure.
大型电力变压器局部放电信号的特征提取是电气设备绝缘在线监测及故障诊断技术领域的前沿研究课题。
The feature extraction of partial discharge signal of transformer is the front research project in online monitoring and diagnosing high voltage insulation failure.
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