Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"rotary-wing"”.
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Automatic Landing of a Rotary-Wing UAV in Rough Seas
Rotary-wing unmanned aerial vehicles (RUAVs) have created extensive interest in the past few decades due to their unique manoeuverability and because of their suitability in a variety of flight missions ranging from traffic inspection to surveillance and reconnaissance. The ability of a RUAV to …
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Study and suppression of vibrations in rotary-wing Unmanned Aerial Vehicles
… titled Study and suppression of vibrations in rotary-wing Uumanned Aerial Vehicles, which focuses on the study of vibrations of the so called quadrotors, which are formed by four rotors equispaced around a central structure. Due to the morphological characteristics of the quadrotors, they …
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Analysis of Sensing Technologies for Collision Avoidance for Small Rotary-Wing Uncrewed Aerial Vehicles
… of different sensing technologies that small rotary-wing aircraft (below 25kg) can be outfitted with for collision avoidance is performed. Several sensing technologies are initially compared through technology analyses and controlled experiments. The topmost systems were then further …
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A lifting surface solution for vortex induced airloads and its application to rotary wing airloads calculations.
Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics. Thesis. 1970. Sc.D.
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Simulated Automobile and Rotary-Wing Aircraft Impacts: Dynamic Neck Response after Surgical Treatment for Cervical Spondylosis
… to expedite post-operative recovery time, allowing for these highly trained individuals to return to active-duty sooner than with a fusion. Due to the physically demanding nature of the military environment, it is important to ensure that this surgical procedure does not increase the likelihood …
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Numerical Simulation and Aerodynamic Design of Small-Scale Rotary-Wing for Unmanned Aerial Systems in Terrestrial and Martian Applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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Progetto e realizzazione del sistema di gestione autonoma del volo e controllo in remoto per un velivolo UAV ad ala rotante
… concerning the development of a small scale Rotary wing UAVs (RUAVs). In the first part of the work, a mission simulation environment for rotary wing UAVs was developed, as main outcome of the University of Bologna partnership in the CAPECON program (an EU funded research program aimed at …
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Airsickness treatment and prevention: Recommendations regarding antiemetics and/or acustimulation
… motion sickness treatments in conjunction with rotary wing operations are available. \r\nThis capstone describes a randomized, double blind, cross over study comparing the effectiveness of four airsickness countermeasures to a placebo control and to each other on reaction time, postural …
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Coast Guard Aviation & the Assignment Problem: An Auction Model to Allocate the Future 'All-Jayhawk' Fleet
… Guard (CG) prepares to transition from a mixed rotary wing fleet of MH-65 Dolphins and MH-60 Jayhawks to an ‘All-Jayhawk’ fleet, an opportunity is presented to seek an optimized set of aircraft assignments, prior to making capital facilities investments. Through more optimized assignments, the …
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Towards MAV Autonomous Flight: A Modeling and Control Approach
… is about modeling and control of miniature rotary-wing flying vehicles, with a special emphasis on quadrotor and coaxial systems. Mathematical models for simulation and nonlinear control approaches are introduced and subsequently applied to commercial aircrafts: the DraganFlyer and the …
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Implementation of mechanical, electrical, and feedback control systems in unmanned aerial vehicles
… capable of stable, autonomous flight. A fixed wing aircraft was chosen to simplify some of the flight characteristics and avoid some of the challenges found in rotary wing machines. Two aircraft were tested: a large and heavy gasoline powered aircraft and a smaller and much lighter electric …
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An examination of the MH-60s common cockpit from a design methodology and acquisitions standpoint
… trend, the U.S. Navy determined that the newest rotary-wing fleet aircraft, the MH-60S and MH-60R, would incorporate these advanced cockpit designs. This program was named Common Cockpit. Using structured interviews with current Navy MH-60S pilots, and analysis of system design models; it was …
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Reduced Order Modeling of Flapping Wing Flight Dynamics
Flapping wing vehicles have become a compelling alternative to classical fixed or rotary wing aircraft, especially as unmanned aircraft technology focuses on smaller, more agile platforms. Flying insects provide an inspiration for the control of flapping wing platforms, using limited computational …
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EnvE:an environment for the emulation of unmanned aerial vehicles
… software control platforms and numerous fixed-wing and rotary-wing aircraft. By requiring only a PC, some cables, and the custom low-level adapter, it is ideal for use in a lab environment. Early evaluation has shown that EnvE provides invaluable testing opportunities for research and an …
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Modeling of a Small-Scale Remote Controllable Helicopter for Simulation and Control Development
… Robotics Competition. The AAVT entered a fixed-wing vehicle in the former and a rotary-wing craft in the latter competition. Commercial flight controllers were used in both competitions in order to familiarize team members with this technology. The next step in research at VT focuses on …
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Demography, Nest Site Selection, and Physiological and Behavioral Responses to Overflights and other Human Activities, of Wilson's Plover (Charadrius wilsonia) at Cape Lookout National Seashore, North Carolina
… Plovers increased vigilance during military rotary-wing and civilian fixed-wing overflights, but not during military fixed-wing overflights. Plovers were vigilant more and incubated less when researchers were present. Wilson's Plovers selected for interdune areas, flats and isolated dunelets …
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Effects of Downwash when Measuring Gas Concentration with UAV-Mounted Gas Sensors
… research concludes that the downwash region of a rotary-wing unmanned aerial vehicle (UAV) does not produce pressure variations substantial enough to cause significant changes in density-based gas concentration measurements. US regulations evaluate gas concentration as a function of gas density, …
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Design and characterization of Hover Nano Aerial Vehicle (HNAV) propulsion system
… to enable the DARPA NAV. In particular, a rotary-wing vehicle is favored because of its high efficiency and simplicity. One large challenge faced for this design is the torque canceling mechanism to counter the torque produced by the rotating rotor. To provide a reasonable torque canceling, …
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Advances in Aero-Propulsive Modeling for Fixed-Wing and eVTOL Aircraft Using Experimental Data
… system identification methods using small, fixed-wing, remotely-piloted, electric, propeller-driven aircraft. A generalized approach for flight dynamics model development for small fixed-wing aircraft from flight data is described and is followed by presentation of novel flight-test system …
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