共查询到20条相似文献，搜索用时 562 毫秒
1.
电缆分接箱是电缆供电中非常重要的设备,主要分为欧式和美式两类。本文主要介绍常规电缆分接箱的优缺点及发展现状,国产共箱式充气柜电缆分接箱的特点。 相似文献
2.
电缆故障综合测试系统又称电缆故障测试仪。主要介绍了应用高智能电缆故障测试仪对故障电缆进行检测的基本方法,阐述了检测电缆故障的原理,解决了电缆发生故障后,如何及时有效地查找故障点,从而进行快速检修的难题,提高了供电系统的安全可靠性。 相似文献
3.
在城市建设持续发展的过程中,在城网供电中电力电缆具有越来越重要的作用。同时,因为电缆不断增多,以及不断延长的运行时间,所以越来越频繁的电缆故障对电缆状态的检修提出了更高的要求。基于此,探讨对电缆的运行状态进行检修所具有的必要性,确定实施目标,进而分析论述预防性检修和在线检测方法,以及应对电缆故障相关的对策,以期进一步提高电缆的运行效率和质量。 相似文献
4.
5.
6.
矿用电缆的维护和检修要制定和执行定期维护制度和电缆日常检查制度.要对电缆短路故障、电缆漏电故障、电缆断线故障、电缆着火、井下电缆故障及时进行处理. 相似文献
7.
8.
9.
10.
随着电力技术的飞速发展,当前电力工程的应用也越来越广泛。电缆作为目前电力系统中主要的传输媒介,其检测技术也显得越来越重要。本文主要列举了国内常用的各种电缆故障的检测方法,详细的阐述了电缆故障中常见的各种缺陷,并对其产生原因进行了总结,从而制定出有针对性的管理策略,以供同行工作参考。 相似文献
11.
曹善庆 《科技成果管理与研究》2011,(6):62-64
斜拉桥混凝土主梁庞大的重量都是通过斜拉索与钢锚箱将力传递到索塔上,作为传力载体和对斜拉索线型起控制作用的钢锚箱的定位精度成为直接影响斜拉桥的内力分布、成桥线型的重要因素。如何有效地考虑这些不利的影响因素成为保证斜拉桥梁上钢锚箱定位精度的关键所在。 相似文献
12.
13.
14.
文章在现有金属飞机钢索变形理论的基础上,对复材飞机操纵钢索的设计和应用进行了详细的论述。总结性地提出了软式钢索操纵的设计步骤,在已有钢索变形量计算理论的基础上,考虑热、结构、座舱增压等因素的影响,计算钢索变形量并确定了钢索初始张力的予加原则,并给出钢索张力示例曲线,为钢索张力维护和调节提供理论依据。 相似文献
15.
This paper is concerned with the problem of simultaneous fault detection and control of switched systems under the asynchronous switching. A switching law and fault detection/control units called fault detector/controllers are designed to guarantee the fault sensitivity and robustness of the closed-loop systems. Different from the existing results, a state reset strategy is introduced in the process of fault detection/control, which reduces the conservatism caused by the jump of multiple Lyapunov functions at switching instants. Further, the proposed strategy is only dependent the state of fault detector/controllers, which is available when the system state is invalid. Finally, by using a performance gain transform technique, non-convex fault sensitivity conditions are converted into the convex error attenuation ones. This further improves the fault detection effect. A numerical example is given to demonstrate the effectiveness of the proposed results. 相似文献
16.
17.
文章主要针对彩电中的三无故障发病率高,维修难度大,结合电路分析及维修实践与体会,对常见的三无故障进行深入分析。 相似文献
18.
RCM是一种针对关键设备的关键组件（部件）设置维修活动的系统化方法。RCM能够识别实用且有效的维修工作以防止这些关键部件的主要故障原因发展，同时以最低的成本保证部件的可用度水平。本文结合故障树方法，针对所采用的维修工作确定模型，主张在考虑不可用度或成本约束的基础上，针对关键部件将监视工作与维修工作相结合，形成一整套的实施方案，对关键部件的维修工作具有一定的指导作用。 相似文献
19.
Guoliang Wang Zhiqiang Li Xin Miao Qingling Zhang Chunyu Yang 《Journal of The Franklin Institute》2019,356(5):3045-3071
This paper focuses on the fault detection problem for a class of discrete-time delay Markovian jump systems with delay term modes partially available. A crucial but general hypothesis considered here is there is a suitable and effective detector to provide a measurement signal of operation mode of delay term. The fault detection filter used as the residual generator could depend on the original system operation mode or the signal emitted from detector. Via minimizing the error between the residual and fault signal, the problem of fault detection and isolation (FDI) is converted into an H∞ filtering problem and closely related to a probability representing the degree of dependence between the original and measurable signals. An improved Lyapunov function depending on such two operation modes is exploited to study the corresponding problems. Sufficient conditions for the existence of the desired FDI filter are presented in terms of LMIs. When such a probability is uncertain or partially unknown, similar problems are also considered. A practical example is used to demonstrate the effectiveness and superiority of the proposed methods. 相似文献
20.
论述了矿井测井技术的主要特点,较详细地介绍了矿井电缆测井系统、全方位钻孔测斜仪、选择伽玛组合测井仪、顺煤层钻进监测系统准直伽玛测量仪和煤矿井下随钻测量系统的组成、测量原理和工作方法,并提出了矿井测井技术的发展趋势,将地面测井技术移植井下,开发出适合煤矿井下的随钻测量技术。 相似文献