发生故障

The equipment's failure diagnosis technique is one of the basic measures to guarantee equipments safety circulate.It can make earlier period forecast and judgement to the equipments, put forward the counterplot for avoiding or reducing the occurrence of the trouble.

设备故障诊断技术是保障设备安全运行的基本措施之一，它能对设备故障的发展作出早期预报，对出现故障的原因作出判断，提出对策建议，避免或减少事故的发生。

Secondly, with the reference of the fuzzy properties of FD and the severe defaults of two-value logic model, FL is introduced to design a general Fuzzy Logic Fault Diagnostic program. This program is used in Fuzzy Pattern Recognition of fuzzy logic diagnostic model.

鉴于故障诊断的模糊性和二值逻辑的严重缺陷，引入模糊逻辑，编制了一个通用模糊诊断程序，对基于模糊逻辑的诊断模型进行模糊模式识别，根据用模糊语言表述的故障征兆，得出发生各种故障的隶属度。

Based on the analysis on the relationship of the positive and the negative sequence impedance, also the positive and negative fault component current under simple and duplicate fault conditions, a cross-country fault identifier is proposed in this paper.

同杆并架输电线路故障的主要特点是有跨线故障，而当系统发生跨线故障时如果没有正确识别出来，那么保护就很有可能无选择性同时切除两条线路，从而对系统的安全稳定运行造成恶劣影响。

The saltation coefficient of wavelet analysis was regarded as a characteristic value to predict a sudden accident and the changing trend of the coefficient was figured out. The results s...

结果表明：小波变换能有效捕捉冲击信号的时域特征和故障发生的时间历程，用小波分层突变系数所做的趋势图能有效地预测故障发展趋势，避免突发故障。

The phase of ω0 frequency fluctuates tempestuously. The resonance peaks of flexural and torsional vibrations response are present at 2/3ω0 1/2ω0 1/3ω0 and 1/4ω0 with three kinds cracked rotor models. Near 1/2ω0 frequency, quasi-periodic and chaotic motions maybe appear. Periodic, quasi-periodic and chaotic motions show on alternately when the rotating speed is near to 2/3ω0.Combined step-by-step integral method with traditional transfer matrix method, an increment transfer matrix method is put forward.

研究结果表明：各种故障情况下，华北电力大学博士学位论文弯振和扭振之间都存在祸合关系，但弯扭祸合振动一般不会威胁机组安全运行：在叶片丢失或滑环飞脱故障时，将产生很大的弯振，同时各转子扭振也将被激发出来，它以工倍频和前三阶固有频率为主；在各种电气故障情况下，各转子都很快被激励出较大幅值的扭振来，相应各转子弯振也发生一定的变化，但它的变化明显滞后于扭振，扭振和扭矩主要以前三阶固有频率为主。

There are 120 kinds of faults occurred in double circuit lines, for the existence of the cross country fault s.

但是，由于同杆双回线会发生跨线故障，致使同杆双回线的故障种类多达120种，并且同杆双回线的故障计算和分析十分复杂。

When left when the test-drive after repair in shop main engine is adding this ship to 540r/min, supercharger occurrence asthma brace up phenomenon, rotate speed lifts slightly again, noise shakes very big, smoke evacuation temperature is normal, hair of on the high side of temperature of air inlet duct is very hot, as good as of smoke evacuation smoke constant, supercharger rotor rotate speed and the rotate speed of right leader supercharger that work normally comparative. 2 breakdown analyse this model diesel engine supercharger breathes heavily brace up the reason has the following sides. Bearing of 1 supercharger rotor damages, bring about on the low side of supercharger rotor rotate speed or wave motion, make inadequacy of compressor part air feed and diesel engine and its demand do not match, bring about air current not to stabilize generation to breathe heavily brace up. 2 diesel engine offers oil, match gas to time forbid, match gas, draw well time and disorder, bring about supercharger to breathe heavily brace up. 3 supercharger nozzle jams, cause smoke evacuation not free, circumfluence of exhaust stroke waste gas, enter jackknife of new energy of life with the below one stroke that take energy of life, produce air current to hit generation to breathe heavily brace up. Canal of 4 smoke evacuation jams, smoke evacuation not free, bring about waste gas circumfluence, hit generation of new energy of life to breathe heavily brace up. 5 jams into gas mouth, enter gas inadequacy, generation breathes heavily brace up. 3 trouble removal are based on above analysis, adopt the following measure to remove trouble.

该舰在厂修后试车时左主机在加至540r/min时，增压器出现喘振现象，转速再略升高，声响震动很大，排烟温度正常，进气管温度偏高发烫，排烟烟色无异常，增压器转子转速和正常工作的右主机增压器转速相当。2故障分析该型柴油机增压器喘振的原因有以下几个方面。1增压器转子轴承损坏，导致增压器转子转速偏低或波动，使得压气机部分供气不足和柴油机及其需求不匹配，导致气流不稳定产生喘振。2柴油机供油、配气定时不准，配气、发火定时紊乱，导致增压器喘振。3增压器喷嘴堵塞，导致排烟不畅，排气冲程废气回流，和下一进气冲程进新气重叠，发生气流冲撞产生喘振。4排烟管堵塞，排烟不畅，导致废气回流，冲撞新气产生喘振。5进气口堵塞，进气不足，产生喘振。3故障排除基于以上分析，采取以下办法排除故障。

In this paper, the conjunct fault feature of broken rotor bar and stator inter-turn short circuit fault have been summarized and the mutual relation of the two has been disclosed according to detailed analysis. As establishes an important theoretical foundation for combination detection of broken rotor bar and stator inter-turn short circuit conjunct fault.

本文通过对仿真结果的详尽分析，系统地概括出了笼型异步电动机发生转子断条与定子绕组匝间短路双重故障时的故障特征，明确揭示了二者之间的相互关系，为实现转子断条与定子绕组匝间短路双重故障联合检测提供了重要的理论依据。

At present multi-branched wave winding structure or lap winding structure are adopted in high capacity hydraulic generators, the authors analyze the features of all fault modality that may occur within the generators with these two kinds of stator windings in detail and design a versatile algorithm that can generate respective fault sets.

目前大型水轮发电机定子绕组普遍采用多分支双层波绕或叠绕的结构，文章针对这2种绕组结构，详细分析了发电机内部可能发生的所有故障形式特点，设计了可形成各自故障集的通用算法，并介绍了该算法在三峡左岸Alstom电机和柘溪电站扩建工程发电机定子故障形式分析中的应用。

Secondly, in spite of the reliability of software and control system, the mechanical system reliability of automatic yarn evenness tester is researched using FTA, and fault trees of each unit and system are established by analyzing its structure and function. According to system reliability theory and events probability, the mechanical system fault tree is analyzed by means of qualitative analysis and quantitative calculation, the system weak parts are found , and the ways are put forward to improve the mechanical system reliability.

其次，在不考虑软件及控制系统可靠性的情况下，利用故障树分析的方法，对全自动条干仪机械系统可靠性进行了分析研究，通过对其结构、功能的分析，建立了单个单元的故障树和系统的故障树；并根据系统可靠性的原理和事件发生的概率，进行了定性分析和定量计算，找出了系统的薄弱环节，提出了提高机械系统可靠性的途径。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。