fault n. 1.过失,过错;罪过,责任。 2.缺点,缺陷,瑕疵。 3.(猎狗的)失去嗅迹。 4.【电学】故障,误差;漏电;【地质学;地理学】断层。 5.【网球】发球出界;犯规。 Faults are thick where love is thin. 〔谚语〕一朝情义淡,样样不顺眼。 fault detection 【机械工程】探伤。 The fault is his own. 这是他自己的错。 a grave fault in a theory 理论上的重大缺陷。 a fault in the machine 机械故障。 image fault 【物理学】像差,影像失真。 numerical faults 数值误差。 a fault on the right side 因祸得福。 be at fault 1. (猎犬追捕猎物等时)失去嗅迹,踌躇不前;不知所措,正在为难。 2. 出毛病,有故障。 3. = in fault (My memory is at fault . 我想不起来了)。 find fault in 看出…缺点。 find fault with 找…的岔子。 have no fault to find with 无错可寻。 hit off a fault (猎狗)闻出(曾一度错失的)嗅迹。 in fault 有过错,有责任 (Who is in fault 是谁的不是?)。 to a fault 过度,极端 (He is kind to a fault. 他过分老实)。 whip a fault out of sb. 鞭打某人使之改过。 with all faults 不保证商品没有缺点。 without fault 〔古语〕无误,确实。 vi. 1.【地质学;地理学】产生断层;有断层余迹。 2.发球出界;犯规。 3.〔方言〕责备,挑剔。 4.〔古语〕犯错误,做错。 vt. 1.找…的岔子,挑剔;〔方言〕责备。 2.【地质学;地理学】使产生断层。 3.把…做错。 He faulted my speech in two ways. 他认为我的讲话有两点不妥。 fault one's performance 表演发生失误。
signal n. 1.信号,暗号;信号器。 2.动机,导火线 (for)。 3.预兆,征象。 call signal 【无线电】呼号。 an alarm signal 警报(器)。 an information signal 〔美国〕暴风警报(旗)。 an international code of signals 国际通用信号。 a signal of distress =a distress signal 船只失事信号。 adj. 1.暗号的,作信号用的。 2.显著的,非常的,优越的。 a signal victory [defeat] 大胜[败]。 vt.,vi. (〔英国〕 -ll-) 发信号[警报]给(人、船等);用信号[警报]通知(暴风、危险等);用动作[手势]示意;预示。 a signaling bomb 信号弹。
As the fault signals are non - stationary transient ones , the traditional signal analysis methods , such as fourier transform , are not so efficient and useful for the fault signal detection 电机发生故障,故障信号中往往含有大量的时变、短时冲击、突发性质的成分,传统的信号分析方法如fourier变换无能无力,不能有效地提取出电机的故障特征。
The method can tell indispensable fault signals from dispensable ones and discover the inherent redundancy of alarm signal set . in a word , the method can realize effective fault diagnosis when the alarm signals are imperfect 这种方法揭示了故障信息集合内在的冗余性,能够区分关键信号和非关键信号,可以在不精确、不完备的警报信息模式下达到正确诊断的目的。
Throughout fault diagnosis development we could see that it is essential to have signal preprocessing and fault signal analysis in order to obtain accurate result during fault diagnosis while methods to implement are just as important 纵观故障诊断的发展历程,要想取得好的故障诊断结果,数据预处理与故障数据的分析是相当重要的,而要取得好的分析效果,所采用的方法也是很重要的。
In chapter 1 , firstly , fault feature extraction methods and their characteristics in fdd are introduced briefly , research progress , existing problems and application prospects on the fault signal processing with wavelet are stated in detail 第一章概述了故障检测与诊断技术中故障特征提取方法的研究进展、存在问题及应用前景。介绍了异步电机及滚动轴承故障诊断的国内外研究现状。
The amounts of fault signal records are increasing rapidly with the elevation of fault monitoring level , which leads to troubles for data transmission and storage , therefore the research of data compression is paid more and more attention 摘要随着对电力系统故障过程监控水平要求的逐步提高,急剧增大的故障录波器数据量给数据传输和储存带来了很大的困难,因此数据压缩也越来越受到人们的关注。
With the cyclostationarity property of rotating machinery fault signal , empirical mode decomposition ( emd ) is applied to the analysis of vibration signal of rotating machine and the issue of interferential items in the method of cyclostationarity is figured out 通过理论推导、仿真实验、真实数据验证,以及和原有方法进行比较,表明经验模式分解联合循环平稳分析方法能够有效地识别故障特征,并避免干扰项。
The application of wt to power system fault signal is also discussed in the thesis . the auther also studies the application of statistics analyse theory . spectral analysis and system identify method can be used to analyse noise energy distribution and damp characteristics of bus capacitance 研究了小波变换和多分辨率结构下mallat小波分解算法分析故障暂态信号的原理和方法,用这一方法研究了故障信号的特点,性质。
And a leveled systemic fault diagnosis model is established lastly . by laboring stretch - bending former system function demands , its condition monitoring contents and hardware testing platform are established . also , fault signals acquisition , examination and process methods are researched as well 在详细分析了转台式拉弯机液压系统的组成结构、工艺特点和故障形式及特点的基础上,确立了液压系统状态监测的内容,组建了系统测试的硬件平台。
After the rigorous study of the theory , using the c + + builder5 . 0 as the developing tool , a vector signals analysis system was visualized , which based on the mode of browser / server and can run on the internet with this system , some real fault signals were analyzed and the value of vector spectrum was approved from the study of the vector spectrum theory and its applications , a conclusion can be affirmed : the vector spectrum has high practical value and a developing future 在理论探讨的基础上,应用c + + builder5 . 0构造了基于browser / server模式的矢量信号远程分析系统,并选取实际的矢量故障信号进行了传统分析方法、矢谱、全谱和全息谱等分析方法的比较,在对比中体现了矢谱技术的优越性。通过本文的理论探讨和矢谱实际应用的研究可以证实:矢谱是一项具有广阔发展前景和较高实用价值的技术。
Aiming at the nonplacidity of the data of the system and paroxysmality of fault signal , the modern wavelet theory is used to dispose the signal of the system , which includes signal sampling , signal denoise , signal detect , sect signal detection , minimal signal detection , signal compress 针对水电机组监测数据的非平稳性、故障信号具有突变性的特性,应用现代小波分析理论对机组监测和诊断系统的信号进行处理,包括信号采样、信噪分离、奇异信号的提取、分段信号的提取与分析、弱信号的提取、信号压缩。