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Dynamic Modeling and Analysis of a Quadrotor-Cable Airborne Wind Energy System
, M.Sc. Thesis Sharif University of Technology ; Saghafi, Fariborz (Supervisor)
Abstract
In this research, the dynamic model of a quadrotor-cable airborne wind energy system is presented. These systems have received a lot of attention in recent years and many examples of them have been designed and built. In addition to comprehensive system modeling, cables and quadrotor in the quasi-stable autorotation phase are modeled separately. These models can be used in other fields in addition to wind energy systems. One of the applications of this thick cable model is in the marine industry.In this research, Newton-Euler method has been used for modeling. The cable model is considered and developed as rigid elements with joints with rotary springs and dampers. The quadrotor model is...
Design and Development of a Propeller Blades in order to Produce Lift and Thrust Simultaneously Inspired by the Maple Seed Aerodynamics
, M.Sc. Thesis Sharif University of Technology ; Javadi, Khodayar (Supervisor)
Abstract
Drawing inspiration from natural phenomena can provide simple solutions for creating new inventions. The graceful spinning and aerodynamic properties of maple leaves motivated a study on their rotation mechanics and physics, ultimately leading to the design of a propeller blade inspired by their shape and properties. Given that each maple tree produces thousands of leaves varying in dimensions, an average shape was calculated using digitizer software and Excel. Due to the small size of the leaves, one leaf was selected for 3D scanning. From various sections of the scanned leaf, airfoils were extracted and propellers were designed using SolidWorks software. Observing that these leaves...