基于模糊故障树的基带设备故障诊断方法

摘要

针对基带设备的某些故障因素因存在模糊性而难以运用数学模型精确评价的问题，提出一种基于模糊故障树的基带设备故障诊断方法。该方法基于基带设备故障原理，利用故障树分析法，以基带信号失锁为研究对象建立故障树，通过建立故障树的最小割集、底事件的精确故障概率和模糊故障概率以及底事件的重要度分析等模型，对故障树进行定性和定量分析，并通过数据演算验证了该故障树分析模型的可行性。该研究为后续开发基带设备故障诊断的专家系统打下了基础。%Aimed at the base band problem that it’s hard to evaluate exactly for some fault factors by using math model because of fuzziness, put forwards base band fault diagnosis method based on fuzzy fault tree. Based on base band fault theory, the method uses fault tree analysis method to establish fault tree by taking based band signal unlock as research object. And then the qualitative and quantitative analysis of the fault tree is accomplished ,by establishing models such as minimal cut set, exact and fuzzy fault probability of bottom things, and importance analysis of bottom things. Finally, the feasibility of models is validated by data calculating. The study provides the base for developing the expert system of base band fault diagnosis.