Download or read book Flapping Wing Design for a Dragonfly like Micro Air Vehicle written by Daniel T. Prosser and published by . This book was released on 2011 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this thesis, the aerodynamics of the Quad-Wing Vehicle, a Micro Air Vehicle designed to hover with four flapping wings in a dragonfly-like configuration, is investigated using Computational Fluid Dynamics (CFD), potential flows analysis, and experimental testing. The CFD analysis investigates the kinematics-parameters design space and identifies values of kinematics parameters that maximize the vertical force reduction in hovering mode while minimizing the aerodynamic power requirement. It also investigates other important considerations, such as the effect of scaling, multi-wing interactions, and comparison with other flapping configurations. In the potential flows analysis , an unsteady 2D panel code is developed and compared with CFD for a broad range of hovering-flight simulations. The results show that, with further development, panel codes may be useful to designers of hovering flapping MAVs because of their time-saving potential compared to CFD. The experimental testing focuses on isolating the aerodynamic forces from other measured forces on a benchtop flapping device, and the findings of the experimental study will be useful for later researchers using experimental methods to study flapping MAV aerodynamics."--Abstract.
Download or read book Design of a Flapping Mechanism for Reproducing the Motions at the Base of a Dragonfly Wing written by Teresa H. Liu and published by . This book was released on 2007 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insect flight is being studied to aid in the development of micro-air vehicles that use the flapping wing model in an attempt to achieve the high levels of maneuverability that insects have. The flight of the dragonfly has been chosen to be modeled because of its exceptional flight capabilities. This thesis addresses the flapping mechanism designed for the root of each wing. The prototype of the mechanism, built at a scale of four times the size of a dragonfly having a wingspan of 150 mm, is able to create motions in the wing of flapping and feathering, and can vary the stroke plane. The coning angle can be set between tests. The design process began with considering two methods of actuation, a four-bar transmission mechanism used in the Micromechanical Flying Insect developed in the UC Berkeley Biomimetic Millisystem Lab, and by pivoting the wing support directly with cables or rigid links. The second design was chosen to be developed further. A functional prototype was built from acrylic and parts made using stereolithography.
Download or read book The DelFly written by G.C.H.E. de Croon and published by Springer. This book was released on 2015-11-26 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the topics most relevant to autonomously flying flapping wing robots: flapping-wing design, aerodynamics, and artificial intelligence. Readers can explore these topics in the context of the "Delfly", a flapping wing robot designed at Delft University in The Netherlands. How are tiny fruit flies able to lift their weight, avoid obstacles and predators, and find food or shelter? The first step in emulating this is the creation of a micro flapping wing robot that flies by itself. The challenges are considerable: the design and aerodynamics of flapping wings are still active areas of scientific research, whilst artificial intelligence is subject to extreme limitations deriving from the few sensors and minimal processing onboard. This book conveys the essential insights that lie behind success such as the DelFly Micro and the DelFly Explorer. The DelFly Micro, with its 3.07 grams and 10 cm wing span, is still the smallest flapping wing MAV in the world carrying a camera, whilst the DelFly Explorer is the world's first flapping wing MAV that is able to fly completely autonomously in unknown environments. The DelFly project started in 2005 and ever since has served as inspiration, not only to many scientific flapping wing studies, but also the design of flapping wing toys. The combination of introductions to relevant fields, practical insights and scientific experiments from the DelFly project make this book a must-read for all flapping wing enthusiasts, be they students, researchers, or engineers.
Download or read book The Evolution of Insect Flight written by Andrei K. Brodsky and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hardback edition of this was the first book on insect flight since J W S Pringle's classic Insect Flight was published in 1957. Much has been written since on applied and ecological aspects of flight, but the question of the origin of wings and flight, their structural concomitants, andthe related aerodynamical issues have been confined largely to armchair speculation in a scattered literature. This book is written by a leading authority on insect flight, and for the first time draws a coherent, empirically based picture of how insect flight may have evolved. Following excellentreviews the book is now being made available in paperback.
Download or read book An Introduction to Flapping Wing Aerodynamics written by Wei Shyy and published by Cambridge University Press. This book was released on 2013-08-19 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an ideal book for graduate students and researchers interested in the aerodynamics, structural dynamics and flight dynamics of small birds, bats and insects, as well as of micro air vehicles (MAVs), which present some of the richest problems intersecting science and engineering. The agility and spectacular flight performance of natural flyers, thanks to their flexible, deformable wing structures, as well as to outstanding wing, tail and body coordination, is particularly significant. To design and build MAVs with performance comparable to natural flyers, it is essential that natural flyers' combined flexible structural dynamics and aerodynamics are adequately understood. The primary focus of this book is to address the recent developments in flapping wing aerodynamics. This book extends the work presented in Aerodynamics of Low Reynolds Number Flyers (Shyy et al. 2008).
Download or read book Development of a Tandem wing Flapping Micro Aerial Vehicle Prototype and Experimental Mechanism written by Christopher DiLeo and published by ProQuest. This book was released on 2007 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the field of micro-aerial vehicles (MAVs), simplicity of design is an important design characteristic. Simplicity in this context implies light weight, a prerequisite for flapping flight, and from a practical standpoint it aids in the manufacture and operation of the mechanism on such a small scale. However, simplicity comes at a price: as mechanisms are simplified they have fewer degrees of freedom, lower controllability, less power output. All of these will effect the ability of the mechanism to generate lift, but the losses can be minimized through proper design and implementation. This thesis describes the design and fabrication of a flapping-wing MAV deriving inspiration from the biological mechanisms of a dragonfly. Dragonflies flap with an inclined stroke plane for hovering flight, which in conjunction with their two pairs of wings, presents an unexplored area of research for MAVs. Small changes in the hovering-flight wing kinematics create large simplifications in their mechanical reproduction. The MAV utilizes these simplifications while maintaining the most important characteristics of dragonfly hovering flight, including passive rotation of the wings, reliance on drag forces to generate lift, and the fluid interactions between adjacent wings flapping out-of-phase. Two successive prototypes are presented, focusing on component design and fabrication techniques. These prototypes allow for easy modification of kinematic variables (phase shift between the fore-and hind-wings and factors that affect wing angle-of-attack) and component variables (most importantly, wing characteristics: size, shape, flexibility), important for future optimization. Initial experimental validation of the prototypes is presented. To facilitate the experimental validation, a mechanical flapping wing mechanism has been designed and fabricated which is able to reproduce the high-stroke-plane kinematics utilized by dragonflies, an ability lacking in present flapping mechanisms. This flapping wing mechanism allows for the measurement of the instantaneous forces on a wing for a particular kinematics, by driving the wing with dynamically similar kinematics in a tank of oil. These experiments will be used in the future to analyze and optimize the lift generated by flapping-wing MAVs.
Download or read book Design of Bio inspired Flexible Flapping Wing for MAV Application written by Arun Agrawal and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Motivated by the demands for indoor reconnaissance in confined, hazardous, or inaccessible spaces, like tunnels, machine rooms, staircases etc., there has been much interest, over the past decade towards the design of hand-held- micro air vehicles (MAVs). However, the flapping flight of insects shows an unmatched performance. A key aspect of the insect flight, responsible for the generation of the aerodynamic forces in an efficient manner, is the flexibility of their wings. Insect wings are actuated only at the root, and undergo large deformations with passive shape adaptation during flapping. Bio-inspired design of a flexible mechanical wing for micro-air vehicle application is the focus of the current work, which is motivated by the superlative flight performance of hawkmoths. The distinguishing feature of an insect wing is the arrangement and the stiffness distribution of various veins. For the design of a mechanical wing, a two step procedure is followed: (i) the static load-deflection characteristics are measured experimentally for a real hawkmoth wing using a camera vision system; (ii) finite element analysis coupled with an optimization solver is used to design the mechanical wing whose overall static-load-deflection characteristics match with the observed load-deflection of the hawkmoth wing. The moduli of various veins in the design wing are selected as optimization variables in the finite element model to manipulate the stiffness distribution of the mechanical wing. The objective function in the optimization scheme is decoupled based on various observations from the design of insect wing found in nature, the finite element analysis, and the structural mechanics based on cantilever beam theory. Based on the design, a scaled mechanical wing is constructed. Finally, the aerodynamic performance of the bio-inspired flexible mechanical wing is tested on a robotic flapper, with commonly observed kinematics of flying insects, and compared with that of a similar geometry rigid wing.
Download or read book Development of an Optimal Dragonfly like Flapping Wing Structure for Use in Biomimetic Micro Air Vehicles written by Praveena Nair Sivasankaran and published by . This book was released on 2016 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distinct Aerodynamics of Insect Scale Flight written by Csaba Hefler and published by Cambridge University Press. This book was released on 2021-05-27 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insect-scale flapping wing flight vehicles can conduct environmental monitoring, disaster assessment, mapping, positioning and security in complex and challenging surroundings. To develop bio-inspired flight vehicles, systematic probing based on the particular category of flight vehicles is needed. This Element addresses the aerodynamics, aeroelasticity, geometry, stability and dynamics of flexible flapping wings in the insect flight regime. The authors highlight distinct features and issues, contrast aerodynamic stability between rigid and flexible wings, present the implications of the wing-aspect ratio, and use canonical models and dragonflies to elucidate scientific insight as well as technical capabilities of bio-inspired design.
Download or read book Flying Insects and Robots written by Dario Floreano and published by Springer Science & Business Media. This book was released on 2009-10-23 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flying insects are intelligent micromachines capable of exquisite maneuvers in unpredictable environments. Understanding these systems advances our knowledge of flight control, sensor suites, and unsteady aerodynamics, which is of crucial interest to engineers developing intelligent flying robots or micro air vehicles (MAVs). The insights we gain when synthesizing bioinspired systems can in turn benefit the fields of neurophysiology, ethology and zoology by providing real-life tests of the proposed models. This book was written by biologists and engineers leading the research in this crossdisciplinary field. It examines all aspects of the mechanics, technology and intelligence of insects and insectoids. After introductory-level overviews of flight control in insects, dedicated chapters focus on the development of autonomous flying systems using biological principles to sense their surroundings and autonomously navigate. A significant part of the book is dedicated to the mechanics and control of flapping wings both in insects and artificial systems. Finally hybrid locomotion, energy harvesting and manufacturing of small flying robots are covered. A particular feature of the book is the depth on realization topics such as control engineering, electronics, mechanics, optics, robotics and manufacturing. This book will be of interest to academic and industrial researchers engaged with theory and engineering in the domains of aerial robotics, artificial intelligence, and entomology.
Download or read book Introduction to Aeroelasticity written by Harijono Djojodihardjo and published by Springer Nature. This book was released on 2023-09-03 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is intended as a core text for courses on aeroelasticity or aero-elasto-mechanics for senior undergraduate/graduate programs in aerospace and mechanical engineering. The book focuses on the basic understanding of the concepts required in learning about aeroelasticity, from observation, reasoning, and understanding fundamental physical principles. Fundamental and simple mathematics will be introduced to describe the features of aeroelastic problems, and to devise simple concurrent physical and mathematical modeling. It will be accompanied by the introduction and understandings of the mechanisms that create the interactions that generate the aeroelastic phenomena considered. The students will also be led to the relation between observed phenomena, assumptions that may have to be adopted to arrive at physical and mathematical modelling, interpreting and verifying the results, and the accompanied limitations, uncertainties and inaccuracies. The students will also be introduced to combine engineering problem solving attitude and determination with simple mechanics problem-solving skills that coexist harmoniously with a useful mechanical intuition.
Download or read book Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications written by Thomas J. Mueller and published by AIAA. This book was released on 2001 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title reports on the latest research in the area of aerodynamic efficency of various fixed-wing, flapping wing, and rotary wing concepts. It presents the progress made by over fifty active researchers in the field.
Download or read book Design and Analysis of a Mechanism Creating Biaxial Wing Rotation for Applications in Flapping wing Air Vehicles written by Sean Harold McIntosh and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flapping wing air vehicles, also known as ornithopters, are a promising new technology, especially for the new class of aircraft known as micro air vehicles (MAV). These vehicles are classified by the defense army research project agency (DARPA) to have overall dimensions less than 15 cm. With their small size, MAVs can operate in locations inaccessible to other larger vehicles. Possible applications of MAVs are numerous for both military and civilian purposes. The majority of MAVs in existence have either fixed or rotary wings. Unfortunately, the aerodynamic performance of these vehicles deteriorates as their size decreases. Insects and hummingbirds, however, are much smaller then present MAVs and operate magnificently. These biological designs inspire the creation of flapping wing MAVs, especially for slow-flight and hover-flight MAVs. Research studies have discovered a variety of aerodynamic mechanisms created by the flapping wing flight of insects. Complex wing rotations about multiple axes have been identified to provide the flight behavior characterized by these newly discovered aerodynamic mechanisms. A major issue in the development of MAVs, is the design of mechanisms that can generate the complex wing motion necessary for the vehicle to fly and hover. (Abstract shortened by UMI.).
Download or read book Biologically informed approaches to design processes and applications written by Mark A. Elgar and published by Frontiers Media SA. This book was released on 2023-03-28 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nature s Flyers written by David E. Alexander and published by JHU Press. This book was released on 2004-11-17 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Nature's Flyers' is a detailed account of the current scientific understanding of the primary aspects of flight in nature. The author explains the physical basis of flight, drawing upon bats, birds, insects, pterosaurs and even winged seeds.
Download or read book Micro scale Flapping Wings for the Advancement of Flying MEMS written by Nicholas R. Coleman and published by . This book was released on 2009 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of Flapping Wings for a Hovering Micro Air Vehicle written by Derek John Bilyk and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents the methods and results of early experiments, conducted at the University of Toronto's Institute for Aerospace Studies, toward the development of wings for a hovering, flapping-wing micro air vehicle. The vehicle envisioned symmetrically actuates four wings within a 15 cm diameter, horizontal disc, thrusting the air downward, using the 'clap-fling' aerodynamic effect. The entire vehicle will fit within a 15 cm cube. Following an elementary, quasi-steady analysis to estimate the required flapping-frequency, test equipment was designed to evaluate various wing concepts. An empirical test process allowed many wing designs to be evaluated through a wide flapping-frequency range and at several flapping amplitudes. One year of experimentation led to a design capable of generating more than 50 grams of thrust while consuming less than 6 W of power. This performance is comparable to the best that an unducted propeller or rotor of the same diameter would achieve.
