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Flight Dynamic Modeling of an Articulated FMAV Using Quasi Steady Aerodynamics

Ghashghaei, Arash | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46104 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Pourtakdoust, Hossein
  7. Abstract:
  8. This thesis is focused on flight dynamics modeling and analysis of an articulated Flapping Micro Air Vehicle (FMAV), where the articulating joint is placed near the wing mid chord span. The articulation modeling, its results and verification due to added degrees of freedom are considered the key motivation and novelties of this project. Initial analyses indicated that a simple articulation device such as joint is not appropriate and will not be efficient for flying FMAV. As a corrective action, a spring-damper mechanism was utilized beside the articulation. Subsequently, the kinematics’ equations are developed and verified using the MSC Automated Dynamic Analysis of Mechanical Systems (ADAMS) environment.Additionally, the aerodynamic modeling was based on the quasi steady strip theory, whose loading results are joined with articulated flight dynamics model to extract the FMAV flight behavior. The complete and articulated wings results were analyzed to evaluate the role of articulation on the FMAV. The comparative study helped to realize some important parameters for sensitivity analysis of the total system. Results for this analysis are shown by figures and charts. The sensitivity analysis resulted in specifying a set of design parameters to be selected for optimization of the wing incidence or twist. Finally a typical tail system was added to the FMAV in order to provide some form of stability and control in the vertical plane of motion. In his regard two PID controllers were designed to track or regulate the pitch as well as the FMAV flying altitude
  9. Keywords:
  10. Quasi Steady Aerodynamics ; Sensitivity ; Proportional-Integral-Derivative (PID)Controller ; Articulated Flapping Micro Air Venicle (FMAV) ; Quasi Steady Strip Theory

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