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View article: Design and Flight Dynamics of a Hand-Launched Foldable Micro Air Vehicle
Design and Flight Dynamics of a Hand-Launched Foldable Micro Air Vehicle Open
This paper discusses the development, flight-testing, and flight dynamics modeling of a Micro Air Vehicle (MAV) that could be deployed in a folded configuration via hand launching. This 112 g MAV features foldable propeller arms that can l…
View article: Methods for stabilizing the longitudinal dynamics of a biomimetic robotic hummingbird in hovering flight
Methods for stabilizing the longitudinal dynamics of a biomimetic robotic hummingbird in hovering flight Open
Hummingbirds and many flying biological organisms use a method known as wing kinematics modulation (WKM) for flight control and stability. This technique involves actively varying the wing flapping kinematics during flight to generate cont…
View article: System identification of a thrust-vectoring, coaxial-rotor-based gun-launched micro air vehicle in hovering flight
System identification of a thrust-vectoring, coaxial-rotor-based gun-launched micro air vehicle in hovering flight Open
The paper discusses flight-test-based system identification of a compact, re-configurable, rotary-wing micro air vehicle capable of sustained hover and could potentially be launched from a 40-mm grenade launcher. The objective was to extra…
View article: Brushless DC Motor Sizing Algorithm for Small UAS Conceptual Designers
Brushless DC Motor Sizing Algorithm for Small UAS Conceptual Designers Open
Accurately sizing vehicle components is an impactful step in the aircraft design process. However, existing methods of sizing brushless DC (BLDC) motors for small unmanned aerial systems (SUAS) ignore how cooling affects motor size. Moreov…
View article: Heat Transfer Models and Measurements of Brushless DC Motors for Small UASs
Heat Transfer Models and Measurements of Brushless DC Motors for Small UASs Open
Heat transfer affects a motor’s sizing, its performance, and, ultimately, the overall vehicle’s range and endurance. However, the thermal literature does not have early-stage models for outrunner brushless DC (BLDC) motors found in small u…
View article: Hydrodynamic modeling and experimental validation of cycloidal propeller in translational motion
Hydrodynamic modeling and experimental validation of cycloidal propeller in translational motion Open
In this paper, detailed development of an unsteady hydrodynamic model of a cycloidal propeller in translational motion (i.e. surging, heaving or combination of both) is presented. Towards this, effect of translational velocity on several h…
View article: Development of a tube-launched tail-sitter unmanned aerial vehicle
Development of a tube-launched tail-sitter unmanned aerial vehicle Open
This paper describes the development and flight testing of a tail-sitter unmanned aerial vehicle (UAV) platform that has the potential to be tube-launched. Integrated with vertical take-off and landing (VTOL) capability, the platform can p…
View article: Flight-Validated Electric Powertrain Efficiency Models for Small UASs
Flight-Validated Electric Powertrain Efficiency Models for Small UASs Open
Minimizing electric losses is critical to the success of battery-powered small unmanned aerial systems (SUASs) that weigh less than 25 kgf (55 lb). Losses increase energy and battery weight requirements which hinder the vehicle’s range and…
View article: DYNAMIC THRUST CONTROL: UNLEASHING THE POTENTIAL OF SINGLE-AXIS GIMBAL MOUNTED PROPULSION SYSTEMS FOR AIRCRAFT
DYNAMIC THRUST CONTROL: UNLEASHING THE POTENTIAL OF SINGLE-AXIS GIMBAL MOUNTED PROPULSION SYSTEMS FOR AIRCRAFT Open
Single-axis gimbal mounted propulsion systems for aircraft are advanced technologies that provide dynamic control over the direction of thrust, independent of the aircraft's orientation.By utilizing a gimbal mechanism, actuators, and a sop…
View article: Flight dynamics model identification of a meso-scale twin-cyclocopter in hover
Flight dynamics model identification of a meso-scale twin-cyclocopter in hover Open
In this paper the flight dynamics of a 33-gram twin-cyclocopter is analyzed via deriving a Linear Time Invariant (LTI) dynamics model from flight test data. The twin-cyclocopter is a novel micro air vehicle that uses two co-rotating cycloi…
View article: Design, development, and flight testing of a 70-gram micro quad-cyclocopter
Design, development, and flight testing of a 70-gram micro quad-cyclocopter Open
This paper discusses the development of a micro air vehicle scale quad-cyclocopter for the purpose of investigating cyclorotor application to low Reynolds number ([Formula: see text]) flight. The 70-gram vehicle is the lightest quad-cycloc…
View article: Robust Reinforcement Learning Algorithm for Vision-based Ship Landing of UAVs
Robust Reinforcement Learning Algorithm for Vision-based Ship Landing of UAVs Open
This paper addresses the problem of developing an algorithm for autonomous ship landing of vertical take-off and landing (VTOL) capable unmanned aerial vehicles (UAVs), using only a monocular camera in the UAV for tracking and localization…
View article: Intelligent Vision-based Autonomous Ship Landing of VTOL UAVs
Intelligent Vision-based Autonomous Ship Landing of VTOL UAVs Open
The paper discusses an intelligent vision-based control solution for autonomous tracking and landing of Vertical Take-Off and Landing (VTOL) capable Unmanned Aerial Vehicles (UAVs) on ships without utilizing GPS signal. The central idea in…
View article: Design, development, and flight testing of a tube-launched coaxial-rotor based micro air vehicle
Design, development, and flight testing of a tube-launched coaxial-rotor based micro air vehicle Open
This paper describes the development and flight testing of a compact, re-configurable, hover-capable rotary-wing micro air vehicle that could be tube launched for increasing mission range. The vehicle design features a coaxial rotor with f…
View article: Augmenting Maneuverability of UUVs with Cycloidal Propellers
Augmenting Maneuverability of UUVs with Cycloidal Propellers Open
This paper investigates a novel concept of using cycloidal propellers to augment the maneuverability of unmanned underwater vehicles. Cycloidal propellers are cross-flow propellers that utilize 360$^{\circ}$ thrust vectoring to provide agi…
View article: A Vision-Based Control Method for Autonomous Landing of Vertical Flight Aircraft On a Moving Platform Without Using GPS
A Vision-Based Control Method for Autonomous Landing of Vertical Flight Aircraft On a Moving Platform Without Using GPS Open
The paper discusses a novel vision-based estimation and control approach to enable fully autonomous tracking and landing of vertical take-off and landing (VTOL) capable unmanned aerial vehicles (UAVs) on moving platforms without relying on…
View article: Augmenting Maneuverability of UUVs with Cycloidal Propellers
Augmenting Maneuverability of UUVs with Cycloidal Propellers Open
This paper investigates the novel concept of augmenting the maneuverability of underwater vehicles with cycloidal propellers. Cycloidal propellers have the potential of providing agile manoeuvring capabilities to an underwater vehicle such…
View article: Development and Validation of a Comprehensive Helicopter Flight Dynamics Code
Development and Validation of a Comprehensive Helicopter Flight Dynamics Code Open
A comprehensive helicopter flight dynamics code is developed based on the UH-60 helicopter and named Texas A\&M University Rotorcraft Analysis Code (TRAC). This is a complete software package, which could perform trim analysis to autonomou…
View article: Force and flowfield measurements to understand unsteady aerodynamics of cycloidal rotors in hover at ultra-low Reynolds numbers
Force and flowfield measurements to understand unsteady aerodynamics of cycloidal rotors in hover at ultra-low Reynolds numbers Open
This paper provides a fundamental understanding of the unsteady fluid-dynamic phenomena on a cycloidal rotor blade operating at ultra-low Reynolds numbers (Re ∼ 18,000) by utilizing a combination of instantaneous blade force and flowfield …
View article: Development of a meso-scale cycloidal-rotor aircraft for micro air vehicle application
Development of a meso-scale cycloidal-rotor aircraft for micro air vehicle application Open
This paper describes the design, controls system development, and hover testing of a 60 -g meso-scale cycloidal-rotor based (cyclocopter) micro air vehicle. The cycloidal rotor (cyclorotor) is a revolutionary vertical take-off and landing …
View article: Design, development, and flight testing of a high endurance micro quadrotor helicopter
Design, development, and flight testing of a high endurance micro quadrotor helicopter Open
This paper describes the experimental design studies conducted to maximize the hover endurance of a micro air vehicle-scale quadrotor helicopter (gross weight < 50 g) by careful design and selection of the individual subsystems while under…
View article: Experimental Investigation of Micro Air Vehicle Scale Helicopter Rotor in Hover
Experimental Investigation of Micro Air Vehicle Scale Helicopter Rotor in Hover Open
This paper describes a fundamental experimental study, which involved systematic performance and flowfield measurements (PIV) to understand and optimize the hover performance of a MAV-scale helicopter rotor operating at Reynolds numbers lo…