Aiming at the localization of dynamic fault tree analysis ( FTA) based on Markov Chains, Monte Carlo method is used to instead of dynamic FTA analysis. 针对基于马尔可夫链的动态故障树分析方法的局限性,把蒙特卡洛方法用于动态故障树分析。
Collecting topology information fast, accurately, and showing the network topology to the network administrator by way of various methods are important. Then, system disposing, analysis of performance, localization of fault and safety management can carry on. 拓扑信息的快速、准确收集以及图形化显示可使网络管理员方便有效的对整个网络进行系统配置、性能分析、故障定位、安全管理等。
With the whole figure visual support, the functions such as inquiring, localization of fault, maintenance, patrol and so on can be realized more conveniently and effectively. 有了全图形可视化的支持,诸如查询、故障定位、巡检维护等功能的实现将更加方便和有效。
The quick and exact localization of the fault is very important to the whole optical network. When we are studying fault management, it is important to know the faults that may occur and to localize the faults exactly. 在进行网络故障管理研究的时候,能够了解网络中可能出现的故障,并且在发生故障后准确地对故障进行定位,这对网络的故障管理是非常重要的。
Fault localization is to determine the location of the fault. 检测出的异常事件经过关联进行故障定位,确定故障的位置。
Currently fault localization serves mainly to diagnose faults at the lower layer of the protocol stack. Fault diagnoses should be performed in an integrated way in new network environments. 目前故障定位的工作主要还是诊断协议栈中较低层的故障,新的网络环境需要故障诊断能够在协议栈的多层中综合完成。
In a word, FNN can automatically attain to knowledge, adapt to the change of environment, and adopt collateral calculation of numerical value, so that it is an effective method which solves localization of traditional fault diagnosis. 总之,模糊神经网络便于实现知识的自动获取,能够自适应环境的变化,推理采用并行的数值计算,因而是解决传统故障诊断系统局限性问题的有效途径。
With good time-frequency localization and good analysis results of sudden-change signals and non-stationary signals, the wavelet analysis technology is one the important methods for signal de-noising, feature extraction, and fault diagnosis. 小波分析技术由于其良好的时频局部化性质,对突变和非平稳信号的分析具有良好的效果,已经成为信号消噪、特征提取和故障诊断的重要方法之一。
After the zero-sequence fundamental voltage enables the function of fault localization, the fault phase is determined according to the characteristic that the terminal voltage of fault phase is the lowest. 由基波零序电压启动故障定位功能,根据发生单相接地故障后故障相机端对地电压最低的特点,判断出故障相别。
So the diagnosis rule can be determined. The diagnosis result indicates that this method can realize the correct localization to the singularity points in signal to identify the impulse time under condition of spring fracture and can diagnose the spring fracture fault of pump valve accurately and effectively. 诊断结果表明,该方法可以实现对信号中奇异点的准确定位,识别出弹簧断裂状态下阀盘对阀座或升程限制器产生冲击的时刻,准确有效地判断出泵阀弹簧断裂的故障。
At the same time, by adjust the probability table; it exceeded the traditional fault trees analysis by getting over the localization of the fault tree analysis, such as independence, binary state of the components. 同时,通过调整BN的条件概率表,对传统的故障树方法作了改进,克服了故障树方法的部件为二态、相互独立等局限。
Good localization on time-frequency domain of wavelet transformation provides better feature representation for faulty circuits than unitary time or frequency domain analysis. However, different wavelets present diverse resolution for fault recognition. 小波变换在信号分析中具有良好时频局部性,比单纯的时域或频域分析方法更适合表示故障电路的特征,但不同的小波函数在故障识别中具有不同的性能。
Fault localization, as a central element of fault diagnosis, determines the efficiency and effectiveness of fault diagnosis to a large extent. 其中,故障定位在很大程度上决定了故障诊断的效率和效果,是故障诊断的核心技术。