Dynamic Study Of Ski-Jump Takeoff Of Carrier-Based Aircraft

As a technology used in many countries, carrier-based aircraft ramp ski-jump take-off has many advantages and wide foreground. Up to now, little academic and experimental work has been done, and many problems have not been solved completely in our country. Thus the systematical studies on the dynamic study of ski-jump take-off have not only the important significance, but also a practical value.Based on the process of ski-jump takeoff, the paper analyzes the dynamic theory of carrier-based aircraft ski-jump takeoff, and establishes completed flight dynamic equations which include the landing gear stroke motion and deck curve.Because of few experimental data in our country, a numerical analytical platform with Matlab/Simulink is programmed. With this programe, the ski-jump process is calculated. Considering some ignored factors, the data accords with the result of ADAMS well. This proves the model in ADAMS is correct.At last, the paper explains the method of building airframe subsystem, front landing gear subsystem, rear landing gear subsystem, front landing gear tire subsystem and rear landing gear tire subsystem and three-dimensional runway briefly. Based on a certain type carrier-based aircraft, aircraft model is built. The process of ski-jump takeoff is simulated. The effects of angle of attack, thrust-weight ratio, aircraft mass, deck wind, and slide distance on the ski-jump performance are discussed quantitatively. The conclusion of the simulation has shown that the model can describe the takeoff performance. The stroke force on the landing gear is huge. So the structural should be strengthened. The out angle should be selected carefully. The suitable slide distance should be selected when takeoff mass is different.