考虑混合不确定性的飞行器若陆冲击载份预示

In order to solve the problem of great uncertainty in the prediction of aircraft landing impact load, a high-precision aircraft-landing gear-ground dynamic model was established, and then the polynomial chaos-Chebyshev interval (PCCI) method was presented by systematically combining the polynomial chaos (PC) theory which consideried random uncertainty with the Chebyshev inclusion function interval method which described interval uncertainty. Therefore, an uncertainty analysis method of landing impact load considering mixed uncertainty was developed. Taking a common seven-degree-of-freedom large aircraft model as an example, and taking Monte Carlo method as a reference, the landing impact load responses of the aircraft under ideal and extreme working conditions were solved respectively, and the reliability of the method was verified by comparison. The purpose of the study is to provide a theoretical support for the safety and stability of aircraft operation.