Engine Life Prediction based on Degradation Data

Cao Yanhua,Guo Jinmao,Li Yong,Lv Huiqiang

Table 4 Standardized data and its principal component

Number Use time/h Standardized data and the PCX ${{{\hat{p}}'}_{\max }}$ $\hat{\theta }_{fd}^{'}$ ${{{\hat{V}}'}_{p}}$ X 1 11 1.6627 1.6318 2.1069 3.1160 2 38 1.4047 1.2874 1.4641 2.3989 3 59 1.2832 1.2591 1.2402 2.1840 4 103 0.7582 0.8850 0.7845 1.4017 5 140 0.5854 0.6252 0.6880 1.0956 6 187 0.4200 0.2964 0.3183 0.5977 7 190 0.2809 0.2890 -0.0010 0.3300 8 250 0.1419 0.2631 -0.5488 -0.0790 9 300 -0.1275 -0.0137 -0.3634 -0.2898 10 320 -0.2302 -0.2843 -0.3829 -0.5173 11 350 -0.3668 -0.4762 -0.6033 -0.8339 12 390 -0.6148 -0.4891 -0.5053 -0.9294 13 450 -1.1071 -0.9942 -0.8822 -1.7235 14 497 -1.2224 -1.3220 -1.0994 -2.1046 15 507 -1.3727 -1.3718 -0.9520 -2.1364 16 550 -1.4955 -1.5858 -1.2637 -2.5100