English  |  正體中文  |  简体中文  |  Items with full text/Total items : 52084/87215 (60%)
Visitors : 8916406      Online Users : 91
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/35628

    Title: Optimum flight trajectory study under the influence of wake vortices
    Other Titles: 翼尖渦流下飛機最佳飛行軌跡之研究
    Authors: 邱德溢;Chiu, Te-yi
    Contributors: 淡江大學航空太空工程學系碩士班
    宛同;Wan, Tung
    Keywords: 渦流;翼尖渦流;基因演算法;WV參數;Wake;Vortices;Genetic Algorithm;WV-Factor
    Date: 2006
    Issue Date: 2010-01-11 06:53:17 (UTC+8)
    Abstract: 現今大型航空器的使用及生產已趨於成熟,所以翼尖渦流的影響也越來越受到重視,但在現今的法規中,僅用較為寬鬆的法規來制定飛行器之間的安全飛行距離。本研究最主要的目的,是藉由所新定義的WV參數來找出最佳的閃避軌跡,以訂出更為嚴謹的安全飛行間距。
    In modern airline’s operation, the larger aircraft’s procreation and usage is a common practice. So the influence of wake vortices is more important upon flight safety. But the rules of flight separation distance are legislating somewhat outdated. In our study, the principal purpose is use the newly created WV-factor to find the optimum flight trajectory, so that the separation distance between two flights could be greatly reduced.
    First, we use the MATLAB tool to create three kinds of wake vortices, and two aircrafts (major transport and business jet) are chosen to regard as the aircraft that encounter the wake vortices. And the classical rigid body, mass/mass distribution fixed flight dynamics equations are solved by standard 4th order Runge-Kutta method. It can found the flight path and flight posture when the aircrafts encounter the wake vortices.
    Secondly, we are inventing a new factor, the WV-factor. In this factor, it has three parts. First part is the harm of vertical direction of the wake vortices, second part is the harm of horizontal direction of the wake vortices, and third part is the harm of rotation motion of the wake vortices. Thus we could implement this new factor to fully investigate the effects of the flight path and flight posture when aircraft encounter wake vortices.
    Finally, in order to achieve an optimum flight trajectory of wake vortex, a steering tool has been employed, namely, the genetic algorithm. In our work the real-value GA approach is chosen due to its computation efficiency and the similarity to the natural world. Our GA process is implemented as follow: both WV-factor and Euler angle values are assigned as the objective functions. The optimum flight trajectory thus computed is conforming to flight safety and flight comfort. It is believed that the concepts and procedures developed will be effective to reduce flight separation distance, and increase the airline’s operation efficiency.
    Appears in Collections:[航空太空工程學系暨研究所] 學位論文

    Files in This Item:

    File SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback