Aeronautical Vehicles Commons^™

Effects Of Canopy-Payload Relative Motion On Control Of Autonomous Parafoils, Nathan Slegers

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

An 8 degree-of-freedom model is developed that accurately models relative pitching and yawing motion of a payload with respect to a parafoil. Constraint forces and moments are found analytically rather than using artificial constraint stabilization. A turn rate controller common in precision placement algorithms is used to demonstrate that relative yawing motion of the payload can result in persistent oscillations of the system. A model neglecting relative payload yawing failed to predict the same oscillations. It is shown that persistent oscillations can be eliminated by reduction of feedback gains; however, resulting tracking performance is poor. A reduced order linear model …

Exomedicine Synthesis Paper, Rita Briggs

Robert "Bob" Twiggs STEM Education Collection

A report by Rita Briggs titled "Exomedicine Synthesis Paper" from 2010.

Avoiding Overrun Accidents On Contaminated Runways, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

The Potential Of Cubesat Networks, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "The Potential of CubeSat Networks" from November 17, 2009.

Small Satellites, Applications And Launch Opportunities, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "Small Satellites, Applications and Launch Opportunities" from October 16, 2009.

University Satellite Programs, 1982-2009, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "University Satellite Programs, 1982-2009" from October 5, 2009.

Avoiding Aircraft Icing Accidents, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Space Systems Design: Building A Satellite To Detect Forest Fires, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Space Systems Design Building a Satellite to Detect Forest Fires" from September 10, 2009.

The Need For An Integrated Small Satellite Space Programme: Perspective From The Sumbandila Missions Operations, Pieter Kotze

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Pieter Kotze titled "The need for an integrated small satellite space programme: Perspective from the Sumbandila Missions Operations" from September 9, 2009.

Opportunities For Small Satellite Programs Provided By The Falcon Family Of Launch Vehicles, Spacex

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by SpaceX titled "Opportunities for Small Satellite Programs Provided by the Falcon Family of Launch Vehicles" from September 9, 2009.

Satedu, University Didactic Satellite For Hands-On Training And Easy Access To Low Cost Small Satellite Missions, Esau Vicente Vivas

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Esaú Vicente Vivas titled "SATEDU, University Didactic Satellite for Hands-on Training and Easy Access to Low Cost Small Satellite Missions" from September 9, 2009.

Isc Kosmotras Dnepr Cluster Launches: Large-Scale Opportunities For Small Satellites, Isc Kosmotras

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by the ISC Kosmotras titled "ISC Kosmotras DNEPR Cluster Launches: Large-Scale Opportunities for Small Satellites" from September 9, 2009.

Netherlands Antilles Satellite Orbit Development, Leonardo De Abreu Ladeira

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Leonardo de Abreu Ladeira   titled "Netherlands Antilles Satellite Orbit Development" from September 9, 2009.

Using Small Satellites For Low Cost Space Education & Science Missions, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Using Small Satellites for Low Cost Space Education & Science Missions" from September 8, 2009.

Itu Radio Regulations Related To N-Gso Satellites, International Telecommunication Union

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by the International Telecommunication Union  titled "ITU Radio Regulations related to N-GSO satellites" from September 8, 2009.

Indian Launch Vehicle Programme: An Overview, Indian Space Research Organization

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Indian Space Research Organization titled "Indian Launch Vehicle Programme: An Overview" from September 6, 2009.

Avoiding Veer-Off Accidents On Contaminated Runways, Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Spacecraft Attitude Control (Mission Design), Norhizam Hamzah

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Norhizam Hamzah titled "Spacecraft Attitude Control (Mission Design)" from September 10, 2009.

Turkish Satellite Technology Applications For Sustainable Development And Capacity Building, Burcu Dikmen

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Burcu Dikmen titled "Turkish Satellite Technology Applications for Sustainable Development and Capacity Building" from September 8, 2009.

The Role Of Education In Small Satellite Programmes, Olaleye Salu

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Olaleye Salu titled "The Role of Education in Small Satellite Programmes" from September 9, 2009.

Unmanned Aircraft System Propulsion Systems Technology Survey, Christopher Griffis, Timothy Wilson, Jeffrey Schneider, Peter Pierpont

Publications

This technology survey is an investigation of various propulsion systems used in Unmanned Aircraft Systems (UAS). Discussed are existing and near-future propulsion mechanisms of UAS, such as reciprocating piston engines, Wankel rotary engines, gas turbine engines, rocket-powered systems, electric motors, and battery-based systems. Also discussed are systems that use proton exchange membrane fuel cells, photovoltaics, ultracapacitors, and propellers. Each system is described in reference to a larger conceptual framework, with instances and profiles of existing UAS employing the system being described. Advantages and disadvantages of each type of propulsion system are identified along with associated technical issues and their respective …

Heavy-Fueled Intermittent Ignition Engines: Technical Issues, Jeffrey Arthur Schneider, Timothy Wilson, Christopher Griffis, Peter Pierpont

Publications

This report contains an overview of the technology and engineering issues with nonturbine heavy-fueled engines for general aviation aircraft and Unmanned Aircraft Systems. In recent years, interest in these types of engines has grown, partly due to the cost, safety, and worldwide availability of gasoline fuels. Within 3 to 5 years, up to five engines will seek Federal Aviation Administration certification as heavy-fuel powerplants. Although there has been some progress, there is no universal standard for certification of these engines (under Title 14 Code of Federal Regulations (CFR) Part 33), or their installation into normal category fixed-wing aircraft or rotorcraft …

Chilling Out In The Sim: The Need For Icing Training., Nihad E. Daidzic

Aviation Department Publications

No abstract provided.

Multidisciplinary Design Optimization Of An Extreme Aspect Ratio Hale Uav, Bryan J. Morrisey

Master's Theses

ABSTRACT

Multidisciplinary Design Optimization of an Extreme Aspect Ratio HALE UAV

Bryan J. Morrisey

Development of High Altitude Long Endurance (HALE) aircraft systems is part of a vision for a low cost communications/surveillance capability. Applications of a multi payload aircraft operating for extended periods at stratospheric altitudes span military and civil genres and support battlefield operations, communications, atmospheric or agricultural monitoring, surveillance, and other disciplines that may currently require satellite-based infrastructure. Presently, several development efforts are underway in this field, including a project sponsored by DARPA that aims at producing an aircraft that can sustain flight for multiple years and …

Cubesats Present Capabilities, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "CubeSats Present Capabilities" from May 20, 2009.

Robotics - One Of The Steps To Space Exploration, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Robotics - one of the steps to space exploration" from May 9, 2009.

Robotics - One Of The Steps To Space Exploration, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Robotics - one of the steps to space exploration" from May 9, 2009.

A Flight Simulation Study Of The Simultaneous Non-Interfering Aircraft Approach, Brian H. Reel

Master's Theses

Using a new implementation of a NASA flight simulation of the Quiet Short-Haul Research Aircraft, autopilots were designed to be capable of flying both straight in (ILS) approaches, and circling (SNI) approaches. A standard glideslope coupler was sufficient for most conditions, but a standard Proportional-Integral-Derivative (PID) based localizer tracker was not sufficient for maintaining a lateral track on the SNI course. To track the SNI course, a feed-forward system, using GPS steering provided much better results.

NASA and the FAA embrace the concept of a Simultaneous, Non-Interfering (SNI) approach as a way to increase airport throughput while reducing the noise …

Design And Control Considerations For A Skid-To-Turn Unmanned Aerial Vehicle, Tanner Austin Sims

Master's Theses

The use of Unmanned Aerial Vehicles (UAVs) are rapidly expanding and taking on new roles in the military. In the area of training and targeting vehicles, control systems are expanding the functionality of UAVs beyond their initially designed purpose. Aeromech Engineering’s NXT UAV is a high speed target drone that is intended to simulate a small aircraft threat. However, in the interest of increasing functionality, enabling NXT to accomplish wings level skidding turns provides the basis for a UAV that can simulate a threat from a missile. Research was conducted to investigate the aerodynamic and performance characteristics of a winged …

Design Of A "Figure-8" Spherical Motion Flapping Wing For Miniature Uav's, Zohaib Parvaiz Rehmat

UNLV Theses, Dissertations, Professional Papers, and Capstones

Hummingbirds and some insects exhibit a Figure-8 motion, which allows them to undergo variety of maneuvers including hovering. It is therefore desirable to have flapping wing miniature air vehicles (FWMAV) that can replicate this unique wing motion. In this research, a design of a flapping wing for FWMAV that can mimic Figure-8 motion using a spherical four bar mechanism is presented. To produce Figure-8 motion, the wing is attached to the coupler point of the spherical four bar mechanism and driven by a DC servo motor. For verification of the design, a prototype of the wing and mechanism is fabricated …