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Developing a Method for the Dynamic Analysis of Flexible Flapping Wing

Jahanbin, Zahra | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 44412 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Meghdari, Ali
  7. Abstract:
  8. Flapping is one of the most usual solutions to produce aerodynamic lift and propulsive force in natural flights, in low Reynolds number. A sample flapping wing mechanism in which propulsion system consists of a battery, two very small DC electrical motors, two gearboxes, a flapping mechanism and flexible beams as wings is studied in this project.Different methods have been proposed to derive the governing equations of motion and simulate the flapping wing system. The main disadvantage of the previous proposed works is the lack of a comprehensive dynamical analysis of the complete system including its components.Therefore, the main objective of the present research is to propose an efficient method based on bond graph approach to develop dynamic and kinematic simultaneous analysis of a flexible flapping system with continuous relation of its different parts in order to study the effect of different parameters (including motor voltage and current, and EI) on flapping applications. Hence, by utilizing the BOND-GRAPH method the relation between mechanical and electrical parts can be observed. In this case 20-sim COMPUTER SIMULATION software is applied to model the whole system. For this purpose, in the proposed model the dynamics of main body, flapping mechanism, drive motors, flexible wings and their dynamical inter-relationships are considered to make it suitable for 3D motion analysis of the system under investigation. Accordingly, this research focuses on resolving the drawbacks of the previous dynamical model presented in the literature.
  9. Keywords:
  10. Ornithopter ; Flexible Wing ; Bond Graph Modeling ; Flapping Mechanism ; Propulsion System Performance ; Aerodynamic Performance

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