共查询到19条相似文献,搜索用时 93 毫秒
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对基于BP神经网络的电控发动机故障诊断进行了初步研究,提出了BP神经网络的结构.举例建立了基于神经网络技术的点火系的故障诊断模型并对诊断系统进行系统测试和做出评价. 相似文献
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基于MapReduce的故障诊断方法将MapReduce运用到故障诊断中,有效解决了故障诊断过程中大数据的处理问题,大大提高了故障诊断的效率。本文对故障诊断技术的发展进行了阐述,针对故障诊断方法的不足阐述了将MapReduce运用其中的优势。将诊断算法分为迭代和非迭代,使用不同的MapReduce模型分别实现。 相似文献
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本文介绍了基于符号有向图(SignedDirectedGraph)模型的故障诊断技术的原理,包括SDG模型中节点和支路的物理意义,SDG模型的建模方法,推理机制以及利用sDG模型进行故障诊断的步骤。详细阐述了sDG故障诊断技术的发展过程和各阶段的进展。最后,分析TSDG故障诊断的优缺点及其改进方法。 相似文献
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采用虚拟仪器开发平台实现了基于小波神经网络的故障诊断系统,以蔡氏电路为例进行故障诊断,通过采用不同的数据处理方法以及不同的神经网络模型,验证了文中所提方法的可行性.人性化的交互界面,可以方便的从虚拟仪器前面板中得到故障的类型和故障的位置.由此可以看出基于虚拟仪器的故障诊断技术具有很强的实用价值. 相似文献
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信号处理技术在滚动轴承故障诊断中的应用与发展 总被引:4,自引:1,他引:3
对近年来国内外滚动轴承故障诊断中的信号处理技术应用状况进行了回顾,重点简述了现代信号处理技术在滚动轴承故障诊断中的应用和各自的特点,并对今后滚动轴承故障诊断技术的发展方向进行了预测。 相似文献
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Due to the wide range of applications of electronic circuits in the recent years, the fault diagnosis in electronic circuits is a foremost problem. The main purpose of the fault diagnosis technique is isolating the faults present in the electronic circuits and also, detecting the fault which affects the safety and performance of the system. For various real-time applications of fault diagnosis, literature presents several techniques for detecting the faults in electronic circuits. In this paper, reviews on the research based on the fault diagnosis techniques which are all gained much attention are comprehended. Accordingly, 114 research papers related to the fault diagnosis are reviewed and analyzed based on the various objectives. In this review, we present the taxonomy of the fault detection in analog circuits and discuss the state of the art algorithms with various advantages and major drawbacks. The comprehensive analysis is carried out on finding the coverage of the publishers, faults, circuits, methods, simulation tools, and metrics. This critical review finally discusses the research challenges that are still available in the existing techniques and the way to extend the current research is also examined. 相似文献
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针对目前炮兵雷达故障维修困难等问题,开发了基于数据挖掘技术的雷达故障诊断系统。详细介绍了数据挖掘的概念、过程和算法,阐述了数据挖掘在雷达故障诊断系统中的应用必要性。提出了故障诊断的系统架构,并针对该层次体系结构进一步提出了数据挖掘的应用模型。应用结果表明系统的可行性和实用性,极大地提高了维修效率和故障诊断能力。 相似文献
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模拟电路的模块级故障诊断 总被引:3,自引:0,他引:3
本文以多端口元件或子网络为基本单元,提出了一种模块级故障诊断方案,这种方案的故障模型更符合电路的实际情况,因而具有更广泛的实际意义,文中首先推导了模块故障诊断议程,并对模块故障可测性问题进行了一般性讨论。然后,给出了模块故障可测的几个拓扑条件,并通过定义广义独立通路使这些拓扑条件适用于一般的非互易网络。 相似文献
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Fault diagnosis of power systems 总被引:1,自引:0,他引:1
Sekine Y. Akimoto Y. Kunugi M. Fukui C. Fukui S. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1992,80(5):673-683
Knowledge-based fault diagnosis systems are classified by the method of inference utilized in the knowledge-based systems for fault diagnosis of power systems. The characteristics of each class and corresponding issues as well as the state-of-the-art techniques for improving their performance are presented. Additional topics covered are user interfaces, interfaces with energy management systems, and expert system development tools for fault diagnosis. Results and evaluation of actual operation in the field are also discussed 相似文献
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Switch fault detection and diagnosis in space vector modulated cascaded H-bridge multilevel inverter
Nithin Raj Tushar Kale Anjali Anand Jagadanand G Saly George 《International Journal of Electronics》2018,105(12):1977-1992
This article investigates the development and online implementation of the power switch open-circuit fault detection and diagnosis in symmetric cascaded H-bridge multilevel inverter. A mathematical modelling technique is presented to understand the effect of the fault on the bridge voltages and output voltage. The modelled values of the output voltage, simulation results and experimental results indicate that the fault diagnostic methods based on the output voltage as the diagnostic feature have certain ambiguity in identifying the fault switch, since the output voltage waveform and its features remain the same for a group of switches under the fault condition. In order to overcome this, fault detection and diagnosis method based on the mean values of the bridge voltages is proposed in this article, which identifies the faulty switch pair and H-bridge in which the fault has occurred. Further, this method has been experimentally validated on a five-level space vector modulated symmetric cascaded H-bridge multilevel inverter. 相似文献