基于图论的光通信系统故障诊断效果评价研究

Study on the evaluation of fault diagnosis effect of optical communication system based on graph theory

为解决光通信系统发生故障时难以精确诊断光功率变化的问题,因此,提出基于图论的光通信系统故障诊断效果评价研究。分析光通信系统通信特性,获取系统发生故障时的运行情况,将该故障情况通过图论模型绘制成故障传播有向图,之后将平面状态的故障传播有向图转换为关联矩阵与邻接矩阵形式,对矩阵形式的有向图进行层次化分解,降低有向图的复杂程度,对分解后的有向图进行故障源候选节点定位、筛选,并排序筛选后的故障源,实现光通信系统故障诊断。经实验验证故障诊断效果:该方法在诊断故障时具备一定抗噪性,诊断过程中不需要大量数据支持,且在故障发生时可精确诊断光功率与频率变化。

In order to solve the problem that it is difficult to accurately diagnose the change of optical power when the optical communication system fails, a study on the effect evaluation of optical communication system fault diagnosis based on graph theory is proposed. Analyze the communication characteristics of the optical communication system, obtain the operation of the system failure, plot the fault situation into a fault propagation directed graph through the graph theory model, and then convert the fault propagation directed graph of the plane state into the form of the correlation matrix and the adjacency matrix, decompose the directed graph in the form of matrix hierarchically, reduce the complexity of the directed graph, locate and screen the fault source candidate nodes of the decomposed directed graph, and sort the fault source after the screening to achieve fault diagnosis of the optical communication system. The experimental results show that this method has a certain anti-noise performance in fault diagnosis, does not need a lot of data support in the diagnosis process, and can accurately diagnose the optical power and frequency changes when the fault occurs.