Aeroengine load spectrum clustering method based on mission segment

According to the classification problem of aeroengine mission profile, 31 flight mission profiles of a fighter engine were clustered. The flight altitude and flight Mach number were selected as the parameters of the flight mission profile, and the cluster scatter plot was generated according to the corresponding flight mission segment average, and the profile types were divided into five categories. Results showed that the low-altitude low-speed profile had the lowest mean value at the dimensionless flight altitude of 0－0.2 and the flight Mach number of 0.4－0.6. The high-altitude high-speed profile had the highest mean value at the dimensionless flight altitude of 1.2－2.2 and the flight Mach number of 1.0－1.8, with the flight mission profile. The dimensionless flight altitude was 0.2－1.2, and the flight Mach number was 0.6－1.0. The contour was further divided according to the profile characteristics; the difference between the flight height and the flight Mach number was different between different sections, which was beneficial to the section division. The difference between normal overload and speed was small, which was not conducive to the division of the profile. The proposed method can quickly and effectively cluster the aeronautical engine mission profile.