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Modeling and Simulation of 12-DOF Parafoil-Payload System Flight Dynamics

Torabinejad, Meghdad | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46472 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Saghafi, Fariborz
  7. Abstract:
  8. This thesis is concerned with the modeling and simulation of twelve degrees of freedom parafoil-payload system, as a multibody aircraft configuration. This 12-DOF dynamic model represents three degrees of freedom each for rotational motion of the parafoil (including suspension lines and canopy) and payload, and three degrees of freedom for translational motion of the parafoil, and one degree of freedom for relative translational motion of the payload, also two degrees of freedom for rotation of the canopy frame respect to the parafoil frame.
    For evaluation of the flight dynamic behavior of parafoil-payload system, the nonlinear differential equations of the system have been derived and solved by numerical simulation. Based on these simulations, dynamic reactions of parafoil-payload system to symmetric and asymmetric deflections of right and left brakes, to changing the longitudinal and lateral incidence angles, to changing the length of the riser as well as the effects of atmospheric wind, existence or inexistence of apparent mass/moment of inertia and changing the payload mass on the flight dynamic behavior are examined. At the end, with linearizing the equations of motion and then with separating the longitudinal and lateral dynamic modes from these derived equations the stability of the model will be analyzed.
    In this thesis, for the nonlinear simulation and obtaining the time histories of kinematic and dynamic parameters of the model we use MATLAB/SIMULINK software
  9. Keywords:
  10. Flight Dynamics ; Stability Analysis ; Modeling ; Simulation ; Simulink Software ; Matlab Software ; Dynamics Models ; Parafoil-Payload System ; Lateral Dynamic Modes ; Longitudinal Dynamic Modes ; Multibody System

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