Enhancing Cnt-Composites With Raman Spectroscopy,
2011
University of Central Florida
Enhancing Cnt-Composites With Raman Spectroscopy, Gregory J. Freihofer
Electronic Theses and Dissertations
Carbon Nanotubes (CNTs) have been the subject of intense research for their potential to improve a variety of material properties when developed as nano-composites. This research aims to address the challenges that limit the ability to transfer the outstanding nano-scale properties of CNTs to bulk nano-composites through Raman characterization. These studies relate the vibrational modes to microstructural characterization of CNT composites including stress, interface behavior, and defects. The formulation of a new fitting procedure using the pseudo-Voigt function is presented and shown to minimize the uncertainty of characteristics within the Raman G and D doublet. Methods for optimization of manufacturing …
Thermomechanical Behavior Of High-Temperature Shape Memory Alloy Ni-Ti-Pd-Pt Actuators,
2011
University of Central Florida
Thermomechanical Behavior Of High-Temperature Shape Memory Alloy Ni-Ti-Pd-Pt Actuators, Douglas E. Nicholson
Electronic Theses and Dissertations
To date the commercial use of shape memory alloys (SMAs) has been mostly limited to binary NiTi alloys with transformation temperatures approximately in the -100 to 100 ºC range. In an ongoing effort to develop high-temperature shape memory alloys (HTSMAs), ternary and quaternary additions are being made to binary NiTi to form NiTi-X (e.g., X: Pd, Pt, Au and Hf) alloys. Stability and repeatability can be further increased at these higher temperatures by limiting the stress, but the tradeoff is reduced work output and stroke. However, HTSMAs operating at decreased stresses can still be used effectively in actuator applications that …
Translational And Rotational Control Of An Asteroid Orbiting Satellite,
2011
Embry-Riddle Aeronautical University
Translational And Rotational Control Of An Asteroid Orbiting Satellite, Takahiro Kuhara
Doctoral Dissertations and Master's Theses
The objective of this thesis is to analyze an effective control scheme for an asteroid orbiting satellite. The thesis first summarizes the progress made in the dynamics formulation of such satellites and then provides a theoretical framework for the control system design. The control objective is to maintain a nadir pointing attitude on a circular equatorial orbit. Using established control design techniques, feedback laws are constructed to control both rotational and translational motion of the satellite so that the control objective is achieved. Computer simulations are carried out to illustrate the effectiveness of the control laws.
Space Mission Engineering: The New Smad,
2011
Morehead State University
Space Mission Engineering: The New Smad, James R. Wertz, David F. Everett, Jeffery J. Puschell
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by James Wertz, David Everett, and Jeffery J. Puschell on "Space Mission Engineering: The New SMAD" in 2011.
Citizen Satellites: Tiny, Standardized Spacecraft Are Making Orbital Experiments Affordable To Even The Smallest Research Groups,
2010
Morehead State University
Citizen Satellites: Tiny, Standardized Spacecraft Are Making Orbital Experiments Affordable To Even The Smallest Research Groups, Robert J. Twiggs, Alex Soojung-Kim Pang
Robert "Bob" Twiggs STEM Education Collection
An article written by Bob Twiggs and Alex Soojung-Kim Pang and published in the Scientific American titled "Citizen Satellites: Tiny, standardized spacecraft are making orbital experiments affordable to even the smallest research groups" from 2010.
Space Science Program: Spotlight Presentation To The Msu Board Of Regents,
2010
Morehead State University
Space Science Program: Spotlight Presentation To The Msu Board Of Regents, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "Space Science Program: Spotlight Presentation to the MSU Board of Regents" from December 9, 2010.
The Weather Forecast Fortoday In Space!Exploring Our Space Environment & Satellite Orbits,
2010
Morehead State University
The Weather Forecast Fortoday In Space!Exploring Our Space Environment & Satellite Orbits, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "The Weather Forecast forToday in Space!Exploring our space environment & satellite orbits" from December 9, 2010.
Modeling And Preliminary Finite Element Analysis On The Spun Structure For The Cpintersep Project,
2010
California Polytechnic State University, San Luis Obispo
Modeling And Preliminary Finite Element Analysis On The Spun Structure For The Cpintersep Project, Jason Carpenter, Kelly Cheng, Jeffrey Ma, Richard Pelham, Kevin Povey
Aerospace Engineering
This paper details the process of modeling and importing the model into FEA for the spun structure of the BS376 spacecraft. Engineering drawings were converted into 3D models using Pro/Engineer and then imported and into Patran for pre-processing of a Finite Element Model. To verify the Finite Element Model, several test cases were set up and solved using Nastran solver. Our simple load cases were found to be in congruence with analytical solution methods validating the finite element model.
The Next Generation Cubesat: A Modular And Adaptable Cubesat Frame Design,
2010
California Polytechnic State University - San Luis Obispo
The Next Generation Cubesat: A Modular And Adaptable Cubesat Frame Design, James Dolengewicz, Lucas Whipple, Stephanie Wong
Mechanical Engineering
The goal of this project is to develop an improved next-generation CubeSat structure for Cal Poly’s PolySat program. Notable achievements include significantly increased ease of access, design to optimize payload space, improved machinability, increased modularity and a platform which allows for easy integration of future payloads.
The Weather Forecast Fortoday In Space! Exploring Our Space Environment & Satellite Orbits,
2010
Morehead State University
The Weather Forecast Fortoday In Space! Exploring Our Space Environment & Satellite Orbits, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "The Weather Forecast forToday in Space! Exploring our space environment & satellite orbits" from November 17, 2010.
Descent Systems For An Improved And Reusable Gemini Capsule,
2010
University of Alabama in Huntsville
Descent Systems For An Improved And Reusable Gemini Capsule, Heather Pitts
Von Braun Symposium Student Posters
No abstract provided.
Aethon Research Rocket, Charger Rocket Works,
2010
University of Alabama in Huntsville
Aethon Research Rocket, Charger Rocket Works, Daniel Cavender, Diana Alsbrook, Leonard French, Jarred Green, Andrew Hiatt, Jarrod Mosteller, Brandon Setayesh, Nathan Toy
Von Braun Symposium Student Posters
No abstract provided.
Mars Sample Return Utilizing The Capabilities Of The Heavy Lift Launch Vehicle,
2010
University of Alabama in Huntsville
Mars Sample Return Utilizing The Capabilities Of The Heavy Lift Launch Vehicle, Matt White
Von Braun Symposium Student Posters
No abstract provided.
Design And Fabrication Of A 1/3 Scale Gemini-Style Capsule,
2010
University of Alabama in Huntsville
Design And Fabrication Of A 1/3 Scale Gemini-Style Capsule, Toshawnka Walker, Jonathan Davis, Brockton Thompson, Ryohsuke Aoki
Von Braun Symposium Student Posters
No abstract provided.
Poias Philoctetes/Okyrhoe Integrated Asteroid Surveyor,
2010
University of Alabama in Huntsville
Poias Philoctetes/Okyrhoe Integrated Asteroid Surveyor, Ian Maddox
Von Braun Symposium Student Posters
No abstract provided.
Noegenetic Io Monitoring Observernimo,
2010
University of Alabama in Huntsville
Noegenetic Io Monitoring Observernimo, William Daniels
Von Braun Symposium Student Posters
No abstract provided.
Space Science From Morehead State University,
2010
Morehead State University
Space Science From Morehead State University, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Space Science from Morehead State University" from October 10, 2010.
Orbital Tori Construction Using Trajectory Following Spectral Methods,
2010
Air Force Institute of Technology
Orbital Tori Construction Using Trajectory Following Spectral Methods, Ralph E. Bordner Iii
Theses and Dissertations
By assuming the motion of a satellite about the earth’s geopotential mimics the known Kolmogorov-Arnold-Moser (KAM) solution of a lightly perturbed integrable Hamiltonian system, this research focused on applying trajectory following spectral methods to estimate orbital tori from sampled orbital data. From an estimated basis frequency set, orbital data was decomposed into multi-periodic Fourier series, essentially compressing ephemerides for long-term use. Real-world Global Positioning System (GPS) orbital tracks were decomposed and reconstructed with error from as low as few kilometers per coordinate axis over a 10-week span to tens of kilometers per coordinate axis over the same time period, depending …
Morehead State University Space Science Center: A Vision For The Future,
2010
Morehead State University
Morehead State University Space Science Center: A Vision For The Future, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Morehead State University Space Science Center: A Vision for the Future" from August 30, 2010.
A Photogrammetry-Based Hybrid System For Dynamic Tracking And Measurement,
2010
Air Force Institute of Technology
A Photogrammetry-Based Hybrid System For Dynamic Tracking And Measurement, Daniel P. Magree
Theses and Dissertations
Noncontact measurements of lightweight flexible aerospace structures present several challenges. Objects are usually mounted on a test stand because current noncontact measurement techniques require that the net motion of the object be zero. However, it is often desirable to take measurements of the object under operational conditions, and in the case of miniature aerial vehicles (MAVs) and deploying space structures, the test article will undergo significant translational motion. This thesis describes a hybrid noncontact measurement system which will enable measurement of structural kinematics of an object freely moving about a volume. By using a real-time videogrammetry system, a set of …
