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Captive System Identification of Coanda-Effect Aerial Vehicle in Hover

Behroo, Mahan | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44967 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Banazadeh, Afshin
  7. Abstract:
  8. Identification of dynamic behavior and extraction of mathematical model for aerial vehicle is important in design, test and evaluation processes. Due to explosion of unmanned vehicles industry in recent years, many innovative aerial concepts is introduced. Coanda-effect air vehicle is one of these novel ideas which is similar to flying saucers. In this study, an experimental scale model of this air vehicle is designed, built and tested with purpose of identifying the linear dynamic model of the vehicle, using the frequency domain identification methods. Performing the system Identification in hover requires a stable hovering capability in the vehicle. Given the inherent instabilities of coanda-effect air vehicle, the only way to stabilize the system is through a closed loop control system. This study has shown that a single great bottleneck in stabilizing the system is high frequency sampling capability. As a result, system identification tests are performed on a one degree of freedom stand specially built for this purpose. During the tests, the coanda-effect air vehicle is installed on the stand and the input frequency sweep is used to excite the longitudinal dynamics of the vehicle. Finally the frequency responses are calculated for the time history of each state variable and proper transfer functions are correlated with the responses
  9. Keywords:
  10. System Identification ; Frequency Domain ; Coanda-Effect Air Vehicle ; Dynamic Linear Model ; Flight Test

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