一种接触器性能评价指标降维方法

A method for index reduction of contactor’s performance evaluation

目前,交流接触器动态响应性能研究采用的评价指标存在种类不同、个数不统一、数据处理复杂、试验成本大、指标权值计算不方便等情况,为此本文以CJ—2025型交流接触器为研究对象,以所在团队之前采纳的21个合闸动态响应性能评价指标为例,提出一种基于灰色关联聚类理论的指标降维方法。首先,通过灰色聚类理论将21个指标划分为主要、补充和可选三类;然后,针对这三类指标的不同典型组合设定多种指标集方案,分别对9台接触器样本的合闸性能进行等级划分和优劣排序;最后,以等级划分相同和优劣排序与21个指标体系基本一致为准则,确定最佳降维指标体系,并在重构的评价指标体系的基础上,给出各个指标客观权重的计算公式。研究结果表明,降维后的评价指标可缩减为13个。

At present,the evaluation indexes used in the study of dynamic response performance of AC contactors are different,the index systems are not uniform,the data processing is complicated with high test cost,and it is not easy to calculate indicator weights.Therefore,this paper proposes an index dimension reduction method based on grey correlation&clustering theory by taking nine CJ—2025 AC contactors as the research objects,and taking 21 indicators adopted by the team as an example.Firstly,21 indicators are divided into important,supplementary and optional categories by grey clustering theory.Secondly,according to the different typical combinations including the three type indexes,a variety of index set schemes are set up,and the closing performance of nine contactor samples is classified and ordered respectively.The optimal index system is determined based on the criteria of the same classification and the ordering consistency as 21 index systems.On the basis of the reconstructed index system,the detailed formulas of objective weight of each index are provided.The result shows that the number of evaluation indexes can be reduced to thirteen with the proposed index-reduction method.