| 查看: 201 | 回复: 1 | |||
| 当前主题已经存档。 | |||
[交流]
【转帖】Analyses of Aircraft Responses to Atmospheric Turbulence
|
|||
|
Analyses of Aircraft Responses to Atmospheric Turbulence Publisher: Delft Univ Pr Number Of Pages: 502 Publication Date: 2003-12 Sales Rank: ISBN / ASIN: 9040724539 EAN: 9789040724534 Binding: Paperback Manufacturer: Delft Univ Pr Studio: Delft Univ Pr This is a Ph.D. dissertation. The response of aircraft to stochastic atmospheric turbulence plays an important role in, for example, aircraft design (load calculations) and flight simulation (handling qualities research and pilot training). In order to simulate these aircraft responses, an accurate mathematical model is required. Two classical models will be discussed in this thesis that is the Delft University of Technology (DUT) model and the Four Point Aircraft (FPA) model. Although they are well established, their fidelity remains obscure. The cause lies in one of the requirements for system identification; it has always been necessary to relate inputs to outputs to determine, or identify, system dynamic characteristics. From experiments, using both the measured input and the measured output, a mathematical model of any system can be obtained. When considering an input-output system such as an aircraft subjected to stochastic atmospheric turbulence, a major problem emerges. During flight tests, no practical difficulty arises measuring the aircraft-system's outputs, such as the angle-of-attack, the pitch-angle, the roll-angle, etc. However, a huge problem arises when the input to the aircraft-system is considered; this input is stochastic atmospheric turbulence in this thesis. Currently, it still remains extremely difficult to identify the entire flowfield around an aircraft's geometry subjected to a turbulent field of flow; an infinite amount of sensors would be required to identify the atmospheric turbulence velocity component's distribution (the input) over it. As a consequence, it is difficult, if not impossible, to identify atmospheric turbulence models from flight tests. http://rapidshare.com/files/3913 ... Turbulence.rar.html [ Last edited by laizuliang on 2007-12-18 at 20:05 ] |
回复此楼» 猜你喜欢
体制内长辈说体制内绝大部分一辈子在底层，如同你们一样大部分普通教师忙且收入低
已经有7人回复
-
过年走亲戚时感受到了所开私家车的鄙视链
已经有9人回复
-
今年春晚有几个节目很不错，点赞！
已经有10人回复
-
情人节自我反思：在爱情中有过遗憾吗？
已经有10人回复
-
基金正文30页指的是报告正文还是整个申请书
已经有5人回复