Application of Optimal Combination Weighting in Aero-Engine Performance Evaluation
In order to improve the reliability and scientific of performance evaluation of aero-engine fleet,a comprehensive perfor-mance evaluation method combining improved TOPSIS and optimal combination weighting is proposed.Firstly,the weights of each evaluation index are calculated by using single subjective and objective weighting methods,and then the optimal combina-tion weights of evaluation indexes are obtained through the optimal combination weighting model based on moment estimation theory.According to these weights,the cosine similarity theory and virtual negative ideal solution are introduced to improve the TOPSIS method,and a more reasonable relative closeness degree is obtained to evaluate the engine performance.Taking PW4056 engine fleet of some company for example,the results show that the new method can effectively evaluate the engine per-formance level,and has good engineering application value.
NETL
NSTL
万方数据
