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An Experimental Investigation On The Micro Air Vehicle
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Book Synopsis An Experimental Investigation on the Micro Air Vehicle by : Shih Kang Huang
Download or read book An Experimental Investigation on the Micro Air Vehicle written by Shih Kang Huang and published by . This book was released on 2014 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was conducted to study the flow characteristics of the flow around the flapping wings of a four-wing flapper as well as the lift and thrust coefficient of a four-wing flapper. In the present study, a clap-and-fling type of four-wing flapper was designed and manufactured by using several flexible materials, such as PET film, latex, and aluminized Mylar. Different cross-strut patterns and dimensions of wings were manufactured and tested to optimize the wing designs. In addition to taking the lift and thrust measurements using a highly sensitive force moment sensor unit, a high-resolution Particle Image Velocimetry (PIV) system was employed to achieve detailed flow field measurements to quantify the evolution of the unsteady vortex flow structure around the wings and in the downstream of the flapper. The force measurements were analyzed in correlation with the detailed flow measurements to elucidate the underlying physics to improve our understanding for an optimized flexible wing design and to achieve better performance for flapping wing micro air vehicles. A woofer loudspeaker was employed at the test section where the four-wing flapper was placed to generate sound distances. The effect of different frequencies and amplitudes of sound waves on the aerodynamic performance was investigated. A sensitive force moment sensor unit and PIV system were utilized to measure the lift and thrust and to take detailed flow field measurements to quantify the effect of sound waves on the flow and wing deformation. The force measurements were analyzed in correlation with the detailed flow measurements and qualitative wing deformation data to elucidate underlying the physics in to improve our understanding of the effect of acoustic disturbances on flexible wings and the overall aerodynamic performance of MAVs.
Book Synopsis An Experimental Investigation of Flapping Wing Propulsion for Micro Air Vehicles by : Sean J. Duggan
Download or read book An Experimental Investigation of Flapping Wing Propulsion for Micro Air Vehicles written by Sean J. Duggan and published by . This book was released on 2000-06-01 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flapping-wing propulsion is studied experimentally through thrust measurements and flow visualization. The objective of the research is to provide further insight into the aerodynamics of flapping-wing micro air vehicles (MAVs) . Experimental work is conducted in the NPS 1.5 m x 1.5 m in-draft wind tunnel. A previously constructed model is suspended by thin wires and is used to measure the thrust performance of the flapping-wing MAV. For this experiment, the model is tested in four configurations; three with varying wing mount stiffness and the fourth with an articulated pitch mechanism. Thrust is indirectly determined using a laser range-finder to measure stream-wise displacement of the model. Three methods of flow visualization are attempted to gain further insight into the flow-field around the MAV. First tufts are placed on and around the model to identify the flow-field Second, a smoke rake placed outside the tunnel is used to route smoke into the test section. Thirdly, a smoke wire system is used to produce smoke in the test section. Experimental results are compared with flow visualization results and previous experimental and numerical work.
Book Synopsis Experimental Investigation of Shrouded Rotor Micro Air Vehicle in Hover and in Edgewise Gusts by : Vikram Hrishikeshavan
Download or read book Experimental Investigation of Shrouded Rotor Micro Air Vehicle in Hover and in Edgewise Gusts written by Vikram Hrishikeshavan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Biomimetic Wing Configurations for Micro Air Vehicle Applications by : Jeffery T. Murphy
Download or read book Experimental Investigation of Biomimetic Wing Configurations for Micro Air Vehicle Applications written by Jeffery T. Murphy and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Geometric Characteristics of Flapping-Wing Propulsion for a Micro Air Vehicle by : Jason Papadopoulos
Download or read book An Experimental Investigation of the Geometric Characteristics of Flapping-Wing Propulsion for a Micro Air Vehicle written by Jason Papadopoulos and published by . This book was released on 2003-06-01 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geometric characteristics of flapping-wing propulsion are studied experimentally through the use of a force balance and a Micro Air Vehicle (MAV) system. The system used is built to duplicate the propulsion system currently on the flying model at the Naval Postgraduate School (NPS) MAV model. Experiments are carried out in a low speed wind tunnel to determine the effects of mean separation and plunge amplitude on the flapping wing propulsion system. Additionally, the effects on flapping wing shape, frequency, and MAV angle on attack (AoA) are also investigated. Some flow visualization is also performed. The intent is to optimize the system so that payload and controllability improvements can be made to the NPS MAV.
Book Synopsis An Experimental Investigation of Flapping Wing Aerodynamics in Micro Air Vehicles by : Christopher J. Bradshaw
Download or read book An Experimental Investigation of Flapping Wing Aerodynamics in Micro Air Vehicles written by Christopher J. Bradshaw and published by . This book was released on 2003-06-01 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flapping-wing propulsion was studied experimentally through Laser Doppler Velocimetry. Measurements were both time-averaged and unsteady, and were conducted on a Micro- Air Vehicle (MAV) model developed at NPS by Professors Max Platzer and Kevin Jones. The objective of this work was to further understanding of the aerodynamics of flapping-wing propulsion. In specific, this study examined separation control on the leading fixed wing due to entrainment by the trailing flapping wings. Further, a study of wake topology examined differences between the optimal and off-optimal cases. Experimental studies took place in the NPS 5' x 5' low speed wind tunnel. The model was supported on a test stand and LDV measurements of the flow field were taken. Studies were made at varying freestream velocities, angles of attack, and flapping frequencies. The test stand was instrumented with force balances to show forces in both the streamwise and vertical directions.
Book Synopsis Experimental Investigation of Pitch Control Enhancement to the Flapping Wing Micro Air Vehicle by : Chee Kian Chin
Download or read book Experimental Investigation of Pitch Control Enhancement to the Flapping Wing Micro Air Vehicle written by Chee Kian Chin and published by . This book was released on 2006 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical pitching characteristic of the NPS flapping-wing Micro Air Vehicle (MAV) developed by Professor Kevin D. Jones are studied experimentally through the use of constant temperature anemometry and force balance techniques. The MAV without the main fixed-wing is placed in a laminar flow field within a low speed wind tunnel with the wake after the flapping wings characterized with a constant temperature anemometer and thrust generation measured by a load cell at various neutral angles, flapping frequencies and free stream velocities. The experiments seek to determine the effects on the MAV propulsion when the neutral angle of attack of the flapping wings is varied. Flow visualization is also performed to better enhance understanding of the flow field across the pitched flapping wings.
Book Synopsis Experimental Investigation Into the Aerodynamic Performance of Both Rigid and Flexible Wing Structured Micro-Air-Vehicles by : Anthony M. DeLuca
Download or read book Experimental Investigation Into the Aerodynamic Performance of Both Rigid and Flexible Wing Structured Micro-Air-Vehicles written by Anthony M. DeLuca and published by . This book was released on 2004-03-01 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force Research Lab, Munitions Directorate, Eglin Air Force Base, Florida has designed a man-portable carbon-fiber Micro-Air-Vehicle (MA V) used for on-the-spot surveillance by Special Operations Forces (SOF) for enemy reconnaissance as well as post-strike Battle Damage Assessment (BDA).The main goals of this experiment are: 1) characterize the flow quality of the new AFIT 3' x 3' wind tunnel and 2) determine the aerodynamic performance characteristics of the 24" span, 6" chord flexible and rigid wing MA V s. The turbulent intensity of the wind tunnel was approximately 2%. Both MA Vs had an average lift slope within 3.5% of the theoretical value. Flexible wings deformed in response to perturbations in local flow field conditions, promulgating the delay of wing stall by nearly double. Aeroelastic effects begin to dominate low speed, laminar Reynolds number effects at tunnel velocities greater than 30 miles per hour. The flexible wing MA V displayed static stability in all three principal control axes (Pitch, Roll, Yaw), while the rigid MA V was not definitively stable in any axis. All flexible wing control surface configurations resulted in predictable and consistent performance between -10 and + 10 elevon deflection. Reponses declined steadily after :+ or -10 showing dramatic direction changes.
Book Synopsis Applied Aerodynamics by : Jorge Colman Lerner
Download or read book Applied Aerodynamics written by Jorge Colman Lerner and published by BoD – Books on Demand. This book was released on 2012-05-11 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamics, from a modern point of view, is a branch of physics that study physical laws and their applications, regarding the displacement of a body into a fluid, such concept could be applied to any body moving in a fluid at rest or any fluid moving around a body at rest. This Book covers a small part of the numerous cases of stationary and non stationary aerodynamics; wave generation and propagation; wind energy; flow control techniques and, also, sports aerodynamics. It's not an undergraduate text but is thought to be useful for those teachers and/or researchers which work in the several branches of applied aerodynamics and/or applied fluid dynamics, from experiments procedures to computational methods.
Book Synopsis Fixed and Flapping Wing Aerodynamics for Micro Air Vehicle Applications by : Thomas J. Mueller
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.
Book Synopsis Stability of a Flapping Wing Micro Air Vehicle by : Marc Evan MacMaster
Download or read book Stability of a Flapping Wing Micro Air Vehicle written by Marc Evan MacMaster and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation into the stability of a flapping wing micro air vehicle was performed at the University of Toronto Institute for Aerospace Studies. A three-degree of freedom force balance was designed and constructed to measure the forces and moments exhibited by a set of flapping wings through 180° of rotation at varied free-stream velocities. The same apparatus was also used to test two tail configurations. A two-dimensional simulation program was written using MATLAB software to identify stable vehicle configurations at or near the hovering condition. A total of four case studies were performed, and each revealed the vehicle had inherent stability. The presence of a tail on the vehicle produced only marginal effects. Of crucial importance was the placement of the vehicle center of gravity with respect to the wings. A preferred distance of 3.5 cm from the c.g. to the leading edge of the wings allowed for stable flight under all cases studied.
Book Synopsis Introduction to the Design of Fixed-wing Micro Air Vehicles by : T. J. Mueller
Download or read book Introduction to the Design of Fixed-wing Micro Air Vehicles written by T. J. Mueller and published by Amer Inst of Aeronautics &. This book was released on 2007-01 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This intriguing book breaks new ground on an emerging subject that has attracted considerable attention: the use of unmanned micro air vehicles (MAVs) to conduct special, limited duration missions. Significant advances in the miniaturization of electronics make it now possible to use vehicles of this type in a detection or surveillance role to carry visual, acoustic, chemical, or biological sensors. Interestingly, many of the advances in MAV technology can be traced directly to annual student competitions, begun in the late 1990s, that use relatively low cost model airplane equipment. The wide variety of configurations entered in these contests and their ongoing success has led to a serious interest in testing the performance of these vehicles for adaptation to practical applications. MAVs present aerodynamic issues unique to their size and the speeds at which they operate. Of particular concern is the aerodynamic efficiency of various fixed wing concepts. Very little information on the performance of low aspect ratio wing planforms existed for this flight regime until MAVs became of interest and the proliferation of fixed wing designs has since expanded. This book presents a brief history of unmanned air vehicles and offers elements of aerodynamics for low aspect ratio wings. Propulsion and the basic concepts for fixed wing MAV design are presented, as is a method for autopilot integration. Three different wing configurations are presented in a series of step-by-step case studies. The goal of the book is to assist both working professionals and students to design, build, and fly MAVs, and do so in a way that will advance the state of the art and lead to the development of even smalleraircraft.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 2005 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Breathing Engines and Aerospace Propulsion by : B. N. Raghunandan
Download or read book Air Breathing Engines and Aerospace Propulsion written by B. N. Raghunandan and published by Allied Publishers. This book was released on 2004 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed papers presented at the 7th National Conference on Air Breathing Engines and Aerospace Propulsion, hosted at I.I.T., Kanpur.
Book Synopsis Experimental and Applied Mechanics, Volume 6 by : Tom Proulx
Download or read book Experimental and Applied Mechanics, Volume 6 written by Tom Proulx and published by Springer Science & Business Media. This book was released on 2011-06-01 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: This the sixth volume of six from the Annual Conference of the Society for Experimental Mechanics, 2010, brings together 128 chapters on Experimental and Applied Mechanics. It presents early findings from experimental and computational investigations including High Accuracy Optical Measurements of Surface Topography, Elastic Properties of Living Cells, Standards for Validating Stress Analyses by Integrating Simulation and Experimentation, Efficiency Enhancement of Dye-sensitized Solar Cell, and Blast Performance of Sandwich Composites With Functionally Graded Core.
Book Synopsis Proceedings of 2021 International Conference on Autonomous Unmanned Systems (ICAUS 2021) by : Meiping Wu
Download or read book Proceedings of 2021 International Conference on Autonomous Unmanned Systems (ICAUS 2021) written by Meiping Wu and published by Springer Nature. This book was released on 2022-03-18 with total page 3575 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes original, peer-reviewed research papers from the ICAUS 2021, which offers a unique and interesting platform for scientists, engineers and practitioners throughout the world to present and share their most recent research and innovative ideas. The aim of the ICAUS 2021 is to stimulate researchers active in the areas pertinent to intelligent unmanned systems. The topics covered include but are not limited to Unmanned Aerial/Ground/Surface/Underwater Systems, Robotic, Autonomous Control/Navigation and Positioning/ Architecture, Energy and Task Planning and Effectiveness Evaluation Technologies, Artificial Intelligence Algorithm/Bionic Technology and Its Application in Unmanned Systems. The papers showcased here share the latest findings on Unmanned Systems, Robotics, Automation, Intelligent Systems, Control Systems, Integrated Networks, Modeling and Simulation. It makes the book a valuable asset for researchers, engineers, and university students alike.
Book Synopsis An Introduction to Flapping Wing Aerodynamics by : Wei Shyy
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: For anyone interested in the aerodynamics, structural dynamics and flight dynamics of small birds, bats, insects and air vehicles (MAVs).
