摘要
Dryden model is usually used in studying the response of flight vehicle to atmospheric turbulence.For a modern flight simulator,it is necessary to generate random winds ( in Dryden model or sometimesothers) with a digital computer.In this paper,a theoretically strict new method to meet this purpose isproposed.By this method,we can acquire a three-dimensional atmospheric turbulence which containsthree components of wind velocity and three components of wind velocity gradient.The reliability of thismethod is checked by comparing the obtained autocorrelation value with the theoretical one.A numericalexample has shown a satisfactory result.Finally,some proposals about how to use this mathematicalmodel in flight simulator are given.
Dryden model is usually used in studying the response of flight vehicle to atmospheric turbulence. For a modern flight simulator,it is necessary to generate random winds ( in Dryden model or sometimes others) with a digital computer.In this paper,a theoretically strict new method to meet this purpose is proposed.By this method,we can acquire a three-dimensional atmospheric turbulence which contains three components of wind velocity and three components of wind velocity gradient.The reliability of this method is checked by comparing the obtained autocorrelation value with the theoretical one.A numerical example has shown a satisfactory result.Finally,some proposals about how to use this mathematical model in flight simulator are given.
