基于改进雷达图法的接触网运行状态评估研究

Research on Operation State Evaluation of Catenary Based on Improved Radar Chart Method

针对传统接触网运行状态评估方法中隶属函数选取困难的问题,提出一种基于改进雷达图法的接触网运行状态评估模型。基于安全性能、平顺性能和受流性能3个方面,建立接触网运行状态评估指标体系;运用层次分析(Analytic Hierarchy Process, AHP)法和改进CRITIC(Criteria Importance Through Intercriteria Correlation)法确定各评估指标的主观权重和客观权重,通过博弈论组合赋权思想将主客观权重结合,从而建立组合权重;再根据组合权重确定各评估指标对应的圆心角并绘制出改进雷达图,提取其相应的特征量并构造评价函数,确定各状态等级的评估区间和评价对象的综合评估值,从而实现接触网运行状态的评估,并基于MATLAB的App Designer开发了该模型下接触网运行状态评估软件。利用某段接触网真实检测数据进行实例分析,研究结果表明,提出的评估方法具有有效性,可准确、定量、直观地展示接触网运行状态。与传统评估方法相比,该方法摆脱了对隶属函数的依赖并实现了评估指标数值与图形的结合,为接触网的运行状态评估提供了新方法。

Aiming at the difficulty of membership function selection in traditional methods of catenary operation state evaluation,a model of catenary operation state evaluation based on improved radar chart method is pro-posed.Based on safety performance,smooth performance and current receiving performance,the evaluation in-dex system of catenary operation state is established.The subjective and objective weights of each evaluation index are determined by using analytic hierarchy process(AHP)method and improved criteria importance through intercriteria correlation(CRITIC)method.The combinatorial weights are established by combining the subjective and objective weights with the game theory combinatorial weights.Then,the center angle correspond-ing to each evaluation index is determined according to the combined weights and the improved radar map is drawn.The corresponding characteristic quantity is extracted and the evaluation function is constructed to de-termine the evaluation interval of each state level and the comprehensive evaluation value of the evaluation ob-ject,so as to realize the operation state evaluation of catenary.Based on the App Designer of MATLAB,the software is developed to evaluate the operation state of catenary under this model.The real detection data of a section of catenary are used for example analysis.The research results show that the proposed evaluation meth-od is effective and can accurately,quantitatively and intuitively display the operation state of catenary.Com-pared with traditional evaluation methods,this evaluation method gets rid of the dependence on membership function and realizes the combination of evaluation index value and graph,and provides a new method for the operation state evaluation of catenary.