Identification of key factors affecting the failure of aviation piston engine turbochargers based on an improved correspondence analysis-polar angle-based classification  

作　　者：Mengyao BAO Shuiting DING Guo LI 

机构地区：[1]Civil Aviation Management Institute of China,Beijing 100102,China [2]Aircraft|Engine Integrated System Safety Beijing Key Laboratory,Beihang University,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》2021年第5期466-484,共19页中国航空学报（英文版）

基　　金：supported by the Innovation Team of Complex System Safety and Airworthiness of Aeroengine from the Co-Innovation Center for Advanced Aeroengine of China;funded by the National Natural Science Foundation of China and the Civil Aviation Administration of China(No.U1833109)。

摘　　要：Turbocharging is an efficient approach for addressing power reduction and oil consumption increase in aviation piston engines during high-altitude flights.However,a turbocharger significantly increases the complexity of a power system,and its considerably complex matching relation with the engine results in a coupling of failure modes.Conventional analytical methods are hard to identify failure-inducing factors.Consequently,safety issues are becoming increasingly prominent.This study focuses on methods for identifying failure-inducing factors.A whole-machine system model is established and validated through experimentation.The response surface method is employed to further abstract the system simulation model to a surrogate model(average error:~3%)in order to reduce the computational cost while ensuring accuracy.On this basis,an improved Correspondence Analysis(CA)-Polar Angle(PA)-based Classification(PAC)is proposed to identify the key factors affecting the failure mode of turbochargers.This identification method is based on the row profile coordinates G varying with the numerical deviations of the key factors,and is capable of effectively identifying the key factors affecting the failure.In a validation example,this method identifies the diameter of the exhaust valve(e_(2))as the primary factor affecting the safety margin for each work boundary.

关 键 词：Failure-inducing factors Improved correspondence analysis Polar angle TURBOCHARGERS Whole-machine system model 

分 类 号：V234[航空宇航科学与技术—航空宇航推进理论与工程]