基于改进多类证据体方法的高速铁路接触网健康状态评估

Evaluation of Health Status of High-speed Railway Catenaries Based on Improved Multiple Evidence Method

针对基于确定权重的评估方法难以适应接触网系统指标之间关系不明确的特点,提出基于证据理论的接触网健康状态评估方法。针对接触网评估指标随机不确定的问题,利用劣化度对其进行指标归一量化处理,随后采用改进的融合规则对证据源进行融合。以某段接触网的检测数据为例对其健康状态进行评估,研究结果表明:所提出的评估方法可行有效,与传统评估方法相比摆脱了对权重的依赖,为接触网的健康状态评估提供了新的方法。

In order to solve the difficulty of adjusting the evaluation method based on determining weight to the uncertain relationship between the indicators of the catenary,an approach for evaluating the health status of the catenary based on multiple evidence theory is proposed.In order to solve the problem of random uncertainty of the catenary evaluation index,the degree of deterioration was used to normalized quantify the index.Then,the improved fusion rule was used to fuse the evidence sources.According to the detection data of a catenary,its health status was evaluated.The results show that the proposed evaluation method is feasible and effective.Compared with the traditional evaluation method,it gets rid of the dependence on weight and provides a new method for evaluating the health status of the catenary.