1) fault right weight
故障权重
2) fault propagation weight
故障传播权重
1.
The scheme takes into account both the fault observability and the constraint of fault propagation weight and sensor placement costs.
针对航天器的故障检测问题,本文提出了模糊概率符号有向图(SDG)系统模型,并与传统SDG模型进行了比较说明;讨论了监控变量的初选取原则,提出了传感器分布优化设计方案,该方案既考虑了故障的可观测性,又考虑了故障传播权重和传感器监控成本的约束问题,方案采用了贪婪启发式算法,通过计算机程序实现了该算法,最后建立了某卫星一次电源系统的诊断模型,应用以上提出的方法,进行了故障检测传感器的分布仿真,结果证明了该方法的有效性。
3) trouble power
故障权值
1.
This paper studies the problem of the reliability of HFC network,proposes two new conception,one is service trouble tolerance unit,the other is trouble power,discusses how to examine the reliability.
研究HFC网络可靠性问题,提出了HFC网络的服务故障度量单位和故障权值两个新概念,并讨论可靠性的检验问题。
4) fault reconstruction
故障重构
1.
Fault diagnosis research based on fault reconstruction in principal component subspace;
基于主元子空间故障重构技术的故障诊断研究
2.
Based on the theory of fault reconstruction, the determination of the principal components in PCA (principal component analysis) model is studied, thus analyzing the performance of PCA model.
基于故障重构理论研究了PCA模型主元数的确定方法,应用累积方差贡献率以及复相关系数对主元模型性能进行分析·在基于PCA理论进行故障诊断中,故障变量可根据故障的方向向量进行重构,未重构方差(VRE)可分别投影于主元子空间(PCS)和残差子空间(RS)·确定最优重构是使两空间的VRE之和达到最小,与此相对应的主元数即为最优主元数(PCs)·应用累积方差贡献率以及复相关系数对主元模型性能进行评价,结果表明确定的PCA模型PCs保证了PCS中的信息存量·对于工业PVC聚合反应过程的故障诊断说明了上述方法的合理性与有效性
3.
Based on the concept on fault subspace, the fault reconstruction issue was explored by using T~2 index, while the geometric method recently developed by Dunia et al focuses on the SPE index.
利用故障子空间的概念 ,研究了基于T2 统计量的故障重构问题 ,获得了主元空间中的完全重构、部分重构 ,以及可重构性的条件 。
5) multiple failures
多重故障
1.
Modeling & reasoning technique of multiple failures based on polychromatic sets;
基于多色集合的多重故障建模与推理技术研究
2.
To solve the consistency problem of knowledge representation of the Bayesian diagnostic network,the mapping framework between the failure modes and the physical components are established,and a kind of hierarchical structural model of the multiple failures is proposed combined with the structural decomposition of the complex system.
针对贝叶斯诊断网络知识表达不一致的问题,提出了一种基于结构分解的层级式多重故障结构模型,并引入多色集合理论,对这种结构模型的底层框架进行形式化描述,使得模型便于计算机表达和操作。
3.
As a low-probabilistic and high-risk failure, the multiple failures is necessary to take into account under a certain condition, and the occurrence probability and severity of multiple failures are varies with the change of operating mode caused by equipment maintenance.
多重故障作为低概率、高风险故障在一定情况下是有必要考虑的,其发生概率及严重程度随设备检修操作而引起的运行方式的改变而变化。
6) multiple fault
多重故障
1.
On the basis of a three tank system, a semi-qualitative approach to diagnosis of multiple faults of a class of hybrid systems is proposed.
为解决混杂系统中多重故障诊断等分支研究相对薄弱的问题,以一个三容水箱系统为背景,提出了一类混杂系统多重故障的半定性故障诊断方法。
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参考词条