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影响SF_6密度控制器监控特性的因素分析 被引量:4
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作者 黎斌 《高压电器》 CAS CSCD 北大核心 2010年第2期72-75,共4页
机械式SF6密度控制器在运行中时有误报警现象。对国内外已使用过的4类SF6密度控制器的不同结构、SF6温度、环温以及使用处海拔高度对监控特性的影响进行了分析。得出,Ⅳ型国产密度控制器质量稳定、监控精度较好;目前使用的SF6密度控制器... 机械式SF6密度控制器在运行中时有误报警现象。对国内外已使用过的4类SF6密度控制器的不同结构、SF6温度、环温以及使用处海拔高度对监控特性的影响进行了分析。得出,Ⅳ型国产密度控制器质量稳定、监控精度较好;目前使用的SF6密度控制器对GCB/GIS的SF6密度具有一定的监控作用,但不能避免开关运行时出现的SF6密度示数"假高"现象,为消除密度示数"假高"、对环境温度的欠补偿和海拔影响,根本出路是开发新型智能化的SF6密度控制器。 展开更多
关键词 SF6密度控制器 温度补偿 欠补偿 海拔高度 监控特性
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点焊热过程双特性融合控制算法
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作者 郭海滨 李桂中 《焊接学报》 EI CAS CSCD 北大核心 2010年第4期105-108,共4页
在协同控制策略基础上,综合运用模糊控制和单片机技术在点焊形核阶段对热量调节算法进行了优化,建立了双特性(优质熔核的动态电流滞后角特性与动态电流特性)监控模式并运用多信息融合技术实现了基于多种监控信息,即电流滞后角增量偏差e... 在协同控制策略基础上,综合运用模糊控制和单片机技术在点焊形核阶段对热量调节算法进行了优化,建立了双特性(优质熔核的动态电流滞后角特性与动态电流特性)监控模式并运用多信息融合技术实现了基于多种监控信息,即电流滞后角增量偏差en与本周波热量调节幅度△mn和下周波热量调节幅度△mn+1与本周波焊接电流偏离程度△In的二次模糊决策法.结果表明,这种监控机制能更好地掌控点焊过程的热量调节方向和尺度,保证焊接熔核质量和焊接时间的一致性. 展开更多
关键词 电阻点焊 特性监控模式 信息融合 二次模糊决策法
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Monitoring the Technical Condition of Dams of Hydroelectric Power Plants with an Automated Monitoring and Earthquake Registration System
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作者 Alexander Kuzmenko Daria Korolenko Evgeniy Zolotukhin 《Journal of Energy and Power Engineering》 2014年第8期1468-1474,共7页
An approach is described that has been developed for auxiliary monitoring of technical condition of hydropower plant dams. It is based on analysis of changes in dynamic characteristics of dams obtained by an automated... An approach is described that has been developed for auxiliary monitoring of technical condition of hydropower plant dams. It is based on analysis of changes in dynamic characteristics of dams obtained by an automated monitoring and earthquake registration system that records microseismic vibrations of structures. The configuration of the system as well as the results of seismometric monitoring of the dam of Krasnoyarsk hydroelectric power plant are described. To study behavior of the dam under normal and extreme loads it was proposed to develop a model of the dam with the use of the finite element method. 展开更多
关键词 Seismometric monitoring earthquake detection dynamic characteristics of dams microseismic vibrations finite element analysis.
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STUDY ON STABILITY OF UNDERGROUND STRUCTURAL ENGINEERING BY ACOUSTIC EMISSION MONITORING SYSTEM 被引量:1
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作者 来兴平 张冰川 蔡美峰 《Journal of Coal Science & Engineering(China)》 2000年第2期15-18,共4页
A simulation acoustic emission (AE) signal was processed. And an effective algorithm was presented to obtain the useful signal about the place information from the simulation signal. This paper introduces the artifici... A simulation acoustic emission (AE) signal was processed. And an effective algorithm was presented to obtain the useful signal about the place information from the simulation signal. This paper introduces the artificial monitoring system, its application at underground roadway and its monitoring results, and tries to explore theoretically analyzing method of stability of underground concrete roadway by AE parameters. A simulation AE signal was processed. And an effective algorithm was presented to obtain the useful signal about the place information from the simulation signal It shows the nice future of the application in the active damage detection of composite material. 展开更多
关键词 concrete structural roadway acoustic emission composite material
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