Application of Principal Component Analysis in Relational Research between Aeroengine Assembly Parameters and Its Vibration

Although aeroengine vibration is mainly due to unbalance of rotating components, assembly methods and assembly parameters fluctuations also play an important role in engine vibration research. Method of principal component analysis (PCA) is put forward in this paper to study the relations between assembly parameters and engine vibration for the first time. The principle of PCA and its application in fault analysis of aeroengine vibration are presented in detail in the following content and the program of PCA is developed using platform Visual C++. Finally, the most critical assembly parameters that take the worst effect on engine vibration, including surface joint degree, bearing clearance, wear loss of bearing casing and face run-out, are achieved after calculations utilizing the program.