Title page for etd-0728117-155744


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URN etd-0728117-155744
Author Zih-Jie Gao
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2016
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Fixed Height Circular Motion Analysis for a Quadcopter Aircraft
Date of Defense 2017-06-14
Page Count 68
Keyword
  • Aerodynamic drag
  • Trajectory control
  • Circular motion
  • Quadcopter aircraft
  • Abstract With highly development of the quadcopter, many practical applications become even more important. The quadcopter owns advantages of high flexibility and small volume. When it is required to conduct a dangerous task or explore a region where is not accessible by humans, for the purpose of security considerations, the quadcopter is a suitable choice.
    In order to achieve trajectory control and flight operations, complex control theories are usually applied. Besides, the designed controller is only applicable to a specific trajectory or operation so the process of controller design becomes cumbersome. Therefore, this thesis employs the approach of mathematical analysis to understand the quadcopter’s flight behavior by establishing its dynamic mathematical model. The circular trajectory commonly used in exploration and investigation missions is chosen for this study. Based on repetitive characteristics and mechanics analysis of a circular motion, find the thrust planning for the quadcopter to complete the circular trajectory. Two mathematical models, without and with the aerodynamic drag are considered. For the case with the aerodynamic drag, the quadcopter is able to accomplish the designated circular task with thrust planning. Nevertheless, the quadcopter with aerodynamic drag is not easy to analyze, a simplified aerodynamic drag model is therefore proposed. Computer simulations show 10% error compared with the complete aerodynamic drag form. If this error is acceptable, the presented aerodynamic drag model can assist controller design for the quadcopter to perform the circular trajectory tasks.
    Advisory Committee
  • Hsin-Hung Chen - chair
  • Keng-Hao Liu - co-chair
  • Chi-Cheng Cheng - advisor
  • Files
  • etd-0728117-155744.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2017-08-29

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