Sinking velocity impact analysis of carrier-based aircraft based on test data

The sinking velocity of carrier-based aircraft is an important input for landing gear design and has a great influence on the weight of the landing gear and airframe structure. Aimed at exploring the effect of the various related landing parameters on sinking velocity for carrier-based aircraft in the actual service environment and based on E-2C measured landing data, correlation analysis of multivariate statistics is applied to the impact analysis of landing parameters on sinking velocity. Seventeen landing parameters are analyzed in the compaction-analysis and the results show that aircraft glide path angle and deck pitch angle are highly correlated with sinking velocity; engaging velocity is moderately correlated with sinking velocity. These three parameters have a great influence on sinking velocity. Nonlinear regression analysis is carried out on the four landing parameters and a fitting equation of E-2C sinking velocity is obtained. The coefficient of determination of the regression model is 0.991 and the mean absolute error is 1.66%, thus the model provides a preferable fitting effect.