故障的

Being a necessary detection method for CAN bus communication faults in severe environment of intense magnetic field, high temperature and high dust concentration, the invention has the advantages that high difficulty in detecting and eliminating CAN bus communication fault of electrobath control device series during aluminum electrolysis is effectively solved; the method is applicable for YFC-99 intelligent aluminum electrolysis fuzzy controller as well as any control system using CAN bus for communication.

本发明方法为在强磁场、高温、高粉尘浓度的恶劣环境中出现的CAN总线通讯故障提供了必要的检测手段，有效解决了铝电解生产现场槽控机系列CAN总线通讯故障的判断和处理难度大的问题。本发明适用于YFC-99型铝电解智能模糊控制机，也可适用于所有以CAN总线为通讯方式的任何控制系统。

In automobile electrical check process,frequently can meet exchanges the situation which the new fuse blows a fuse immediately,moreover these breakdowns processing and the inspection quite are generally complex,The automobile services and drives the personnel frequently to be unable to inspect,The partial personnel even use replace a larger capacity fuse to replace,Has created a bigger harm,Serious also can create the fire equipollent major accident,This article from inserts the fuse is the fuse principle analysis obtains,Key introduction overhaul method and method,Thus is faster accurately looks up the breakdown reason and the spot.

在汽车电路检查过程中，经常会遇到换上新的保险丝立即熔断的情况，而此类故障的处理与检查往往比较复杂，汽车维修与驾驶人员常常无从入手，有的甚至采用更换更大容量的保险丝代替，造成了更大的电器损害，严重的还会造成火灾等重大事故。本文从插保险丝即熔断的原理分析入手，重点介绍检修的方法和手段，以便更快速更准确地查到故障原因和部位。

The fault diagnosis of Fuzzy ANN is realized by the Neural Network Toolbox of MATLAB. The result is proved valid, but also proved easy to be trapped in the local extremum.

这里以BP网络为应用模型，把模糊化后的故障特征参数作为网络的输入样本，对样本数据训练、仿真，应用MATLAB提供的神经网络工具箱函数实现了模糊神经网络对设备故障的诊断，结果证明了该诊断模型的有效性，但也暴露出BP算法易陷入局部极值的弱点。

In the transformer differential protection, it is a congenital and difficult problem that cant be avoided how to distinguish the magnetizing inrush current with the internal fault current. It has become the focus studied for many years. The existing transformer protection principles all have certain defects and the main reason lies in inadequate understand of the transformer fault mechanism.

在变压器差动保护中，如何区分励磁涌流与内部故障电流是一个先天性的、不可回避的难题，多年来一直成为研究的热点，而且现有的变压器保护原理也都存在一定的缺陷，其主要原因在于对变压器内部故障的机理认识不够。

The real-time and on-line fault diagnosis and the observation of system states are realized by constructing a new reduced-order state observer for the augmented system with faults, and the physically unrealizable problem is solved.

然后通过构造一种新的含有故障的增广系统的降维状态观测器，实现了故障的实时在线诊断和系统状态的观测，解决了最优容错控制的物理不可实现问题。

This text aim at the neutral spot not connect the ground or through eliminate arc coil to conncect ground of connecting a ground of system, put out to connect a ground of electricity arc ability existently low and starts of the system occurrence Human body feeling electricity connect the ground to conduct electricity to press, the equipments inner part breaks down to connect the ground, having no problem of protect the ability.On the foundation of the thorough research protection method, put forward to change into above-mentioned system the protection project that the intelligence connects a ground of system movement.At the same time, introduced the intelligence to connect a ground of composing of system, the work principle, function and characteristicses and system to circulate the circumstance.

本文简要分析了我国配电网自动化的现状和面临的主要问题，指出合理、高效的配电系统网络结构是提高供电可靠性和供电质量的前提条件，本文在对国内现有配网方式进行全面分析的基础上，结合我国城网改造的目标的显状，提出了一种科学&田&字型接线，对其技术性、经济性和可靠性进行了论证，（分析了不同故障情况下系统如何完成故障的定位、隔离，网络的重构及负荷的转移，指出该方案具有很高的供电可靠性和相对较低的备用容量，是一种符合国情国力并能适应配网自动化发展的组网方案）；给出了适合该方案的不同控制模式并进行了优劣比较，指出集中远方控制模式划配网自动化发展的必然趋势；最后本文给出了该控制模式下的测控方式。

On the basis of electrical network characterization, Chapter 5 presents a new principle to detect PCB's fault first time. Three methods of online test for electrical network characterization are described in detail. Then, a hierarchical, combinatorial approach is firsfly presented. The test efficiency of this method is studied also. The experiment result shows that the new approach can greatly enhance the test efficiency of fixtureless tester under the requirement of 100% test for PCB's connections.

本文第5章利用集成电路的输出特性，首次提出了一种新的印刷电路板连接故障的检测原理，给出了三种印刷电路板电气网络输出特性的在线测试方法；在此基础上，首次提出并实现了基于飞针式在线测试仪的层式组合测试思想，研究了这种方法的检测效率；应用实例表明这种方法在不降低对印刷电路板连接故障100％测试的要求下，可以有效地提高飞针式在线测试仪的检测效率。

Wavelet multi-resolution analysis is applied to decompose the signal into multiple-level and the wavelet coefficient modules of its high-frequency components are obtained. The wavelet coefficient modules of a broken signal can be extracted by software demising. The threshold of demising is decided by the difference between the wavelet coefficient modules of a broken signal and those of a noise. The wavelet coefficient modules of the broken signal were shown in different levels, then the faults can be detected and distinguished by the integrated features of the variant levels' wavelet coefficient modules.

利用小波多尺度分解技术，将信号进行多尺度的小波分解，得到不同尺度下的信号高频分量的小波系数模值，并根据奇变信号和噪声信号小波系数模值的差异，采用软阈值去噪法，对其高频分量小波系数进行去噪处理，获取不同尺度上突变信号的小波系数模值，实现对故障的检测，并可根据不同尺度上小波系数模值的对应关系，实现对多重并发故障的区分。

We're going to fault-failure analysis of the phenomenon, advice and information on parts of drawings, by fax Muller Martini, in line with company maintenance engineer Muller Martini is the second reasons and maintenance advice: first, check book block fixture tension of main spring length is 127mm; second, the book block fixture of the regulation to make the connection to the book block fixture of the chain and connect the main motor gear respectively correspond to a single yellow line is consistent with the relative distance between.

我们将故障产生的现象、故障的分析意见及有关零部件的图纸，通过传真发给马天尼公司方面，马天尼公司维修工程师一致认定是第二种原因所致，并提出了维修意见：第一，检查保持书芯夹具张力的主弹簧长度是否为127mm；第二，书芯夹具初始位置的调节要使连接书芯夹具的链条与连接主马达的齿轮上各自相对应的一根黄线之间的相对距离一致。

Based on the nonlinear dynamical model of the rotor-bearing system with rub-impact fault, the stability of the periodic motion of the system in unbalance-rotating speed plane and rotor/stator clearance- rotating speed plane were studied by the continuation-shooting algorithm. The system periodic motion and its stability were obtained. An experimental setup was developed to investigate nonlinear vibration characteristics of such rotor bearing system.

根据碰摩转子轴承系统的非线性动力学模型，利用延拓打靶算法，在碰摩转子轴承系统不平衡量-转速和碰摩间隙-转速参数域内，研究系统的周期运动及其分岔失稳等动力学行为，得到了系统周期运动的稳定性及失稳规律；建立了研究转子轴承系统碰摩故障的实验装置，通过实验，研究了转子系统碰摩故障的非线性振动的特征。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。