可靠性仿真在模糊故障诊断中的应用

针对模糊故障诊断中传统模糊关系矩阵确定方法不能动态适应具体设备运行状态变化等缺点,提出了基于故障树的可靠性仿真方法,用于确定模糊关系矩阵。该方法首先利用元器件的失效分布数据和设备深层原理性知识建立故障树,进行可靠性仿真,然后根据仿真结果和具体设备的历史故障信息动态计算模糊关系矩阵。给出了该方法的具体应用步骤。实际诊断结果表明,该方法可以有效地提高模糊故障诊断的准确性与针对性。

Application of the reliability simulation in fuzzy fault diagnosis

To solve the problems arising in the process of determining the fuzzy relation matrix in fuzzy fault diagnosis,such as great difficulty,and failure to dynamically adapt to the changes of the equipment's running states,a method of reliability simulation based on fault tree is presented.First,by using the failure distribution data of components and deep-level knowledge of the equipment,a fault tree is constructed.Then,according to the simulation results and historic fault information of the equipment,a fuzzy relation matrix is calculated dynamically.The steps of this method are presented in detail and the practical diagnosis results show that the accuracy and pertinence of fuzzy fault diagnosis are greatly improved and the method has an important practical value.