基于主成分分析的航空发动机性能综合评估

摘要

引入主成分、相关系数矩阵、主成分贡献率及累计贡献率等概念，得出影响航空发动机性能的各个主成分，采用基于主成分分析的综合评估方法对发动机性能进行评估。与单参数性能评估方法相比，多参数性能综合评估方法更加客观有效，在对发动机进行性能评估时大大减少了出错的概率，并指出航空发动机多参数性能综合评估在工程应用的局限。%In the projects of aero-engine ,principal component analysis method is used to estimate the per -formance of aero-engine ,by bringing some definitions such as principal component ,relevance coefficient matrix,contribution quotiety of principal component ,accumulative contributionquotiety ,etc,to get every principal component which influent the performance of aero-engine .Compared with single-parameter es-timation method ,there is little error with multi-parameters analysis method .And at the same time ,multi-parameters analysis method include with single-parameter estimation method .It can also put every valu-able parameter together ,not like single-parameter one just take one parameter into account ,for example , people only take EGT or FF into consideration when they use single-parameter estimation method to esti-mate the performance of aero-engine.Of course,with multi-parameters analysis method ,aero-engine en-gineers can do their jobs more accurately .With the development of engineering technique ,multi-parame-ters estimation method will substitute for single -parameter estimation method to assess the performance of aero-engine in the performance synthetic estimation and fault diagnosis projects .