A Software Defined Radio Communications System For A Small Spacecraft,
2015
SelectedWorks
A Software Defined Radio Communications System For A Small Spacecraft, Michael Hlas, Jeremy Straub, Ronald Marsh
Jeremy Straub
Software defined radios (SDRs) are poised to significantly enhance the future of small spacecraft communications. They allow signal processing to be performed on a computer by software rather than requiring dedicated hardware. The OpenOrbiter SDR (discussed in [1] and refined in [2]) takes data from the flight computer and converts it into an analog signal that is transmitted via the spacecraft antenna. Because the signal processing is done in software, the radio can be easily reconfigured. This process is done in reverse for incoming transmissions, which are received by the SDR and decoded by software. Figures 1 and 2 provide …
An Onboard Distributed Multiprocessing System For A Cubesat Spacecraft Created From Gumstix Computer-On-Module Units,
2015
SelectedWorks
An Onboard Distributed Multiprocessing System For A Cubesat Spacecraft Created From Gumstix Computer-On-Module Units, Michael Wegerson, Jeremy Straub, Ronald Marsh
Jeremy Straub
The OpenOrbiter Small Spacecraft Development Initiative at the University of North Dakota [1] aims to make ac-cess to space for research and educational purposes easier by enabling the creation of low-cost CubeSats. It is creating the Open Prototype for Educational Nanosats (OPEN), a framework for developing a 1-U CubeSat space-craft with a parts cost of less than $5,000 [2]. The designs [3], documentation and computer code from this will be made publically available to enable the development of programs at other institutions.
The Use Of Low-Cost ‘Balloonsats’ For Stem Education With 3d Printing,
2015
SelectedWorks
The Use Of Low-Cost ‘Balloonsats’ For Stem Education With 3d Printing, Jeremy Straub, Josh Berk, John Nordlie, Ronald Marsh
Jeremy Straub
A new technology, known as 3D printing, allows the rap-id fabrication of plastic structures of virtually any config-uration. These structures are light-weight, dura-ble and inexpensive. This paper considers the utility of utilizing 3D printing to create enclosures for ‘BalloonSats’ – small, low-cost spacecraft analog which can be utilized by students to understand space engi-neering, conduct near-space science (e.g., physics, bio-logical and other experiments) and touch the edge of space.
Considering Scheduling Algorithms For An Open Source Software Spacecraft,
2015
SelectedWorks
Considering Scheduling Algorithms For An Open Source Software Spacecraft, Calvin Bina, Jeremy Straub, Ronald Marsh
Jeremy Straub
The OpenOrbiter Small Satellite Development Initiative at the University of North Dakota [1] is working make space research and education more accessible world-wide [2], through the design and public release of a complete set of plans, software and other documents (see [3]) for a 1-U CubeSat. This design targets a parts cost of no more than $5,000 [4]. These lowered costs, combined with the efficiencies of the CubeSat form fac-tor [5] and free-to-qualified-developer launch services [6, 7] should facilitate greater access to space for the ed-ucational, research and other communities.
Work Done On The Operating Software For Openorbiter,
2015
SelectedWorks
Work Done On The Operating Software For Openorbiter, Dayln Limesand, Timothy Whitney, Jeremy Straub, Ronald Marsh
Jeremy Straub
The OpenOrbiter Program aims to develop a tem-plate for a CubeSat spacecraft that can be used world-wide to reduce spacecraft development costs1. Unlike other approaches, which may require $50,000 in upfront hardware costs2 or $250,000 in design expenses2, an OPEN-class spacecraft can be built with a parts budget of under $5,0003. This aims to enable low-cost educa-tional missions and missions in developing regions4.
Designing An Intelligent Attitude Determination And Control System (Adcs),
2015
SelectedWorks
Designing An Intelligent Attitude Determination And Control System (Adcs), Michael Wegerson, Matt Partridge, Nathan Crocker, David Schindele, Broc Friend, Levi Lewis, Ben Johnson, Jeremy Straub, Ronald Marsh
Jeremy Straub
CubeSat spacecraft have been shown to provide significant cost [1], research [1] and educational benefits [2]. Prior work at UND has demonstrated the efficacy of this form factor of craft for asteroid as-sessment activities [3] and onboard image processing [4]. Work is al-so ongoing to develop a low-cost framework [5] for CubeSat devel-opment to enable activities at UND and at other locations.
Creating A Low-Cost Radio For An Open Cubesat,
2015
SelectedWorks
Creating A Low-Cost Radio For An Open Cubesat, Michael Wegerson, Jeremy Straub, Ronald Marsh
Jeremy Straub
A reliable communication system is key to the success of a CubeSat mission, allowing for data to be trans-mitted to the ground station and commands to be up-loaded to the satellite. To satisfy this need, the OpenOrbiter satellite (a 1-U CubeSat [1], being devel-oped with a target parts budget of under $5,000 [2]) is leveraging previously space-tested [3], low-cost trans-ceiver design which is based on the SI 4463 IC unit. This board design will be included in the publically available Open Framework for Educational Nanosatel-lites (OPEN) allowing others to modify, enhance and/or make use of the design in the future.
Design Of A 1-U Cubesat Structure For The Open Prototype For Educational Nanosats,
2015
SelectedWorks
Design Of A 1-U Cubesat Structure For The Open Prototype For Educational Nanosats, Benjamin Kading, Jeremy Straub, Ronald Marsh
Jeremy Straub
CubeSats are a class of small satellites that have recently gained significant interest and are being developed and used for engineering test missions, bona fide research and various other applications. A 1-U CubeSat (the orig-inal form factor) has nominal dimensions of 10 cm x 10 cm x 10 cm and a mass of no more than 1.33 kg [1](however, some integrators are now consistently allow-ing higher mass levels). Due to their small size and the demonstrated ability to successfully use consumer-grade electronics in low-Earth orbit, CubeSats cost sig-nificantly less than larger sized satellites [2]. These re-duced costs, however, are still …
The Use Of Additive Manufacturing For Cubesat Design And Testing,
2015
SelectedWorks
The Use Of Additive Manufacturing For Cubesat Design And Testing, Jeremy Straub, Ronald Marsh, Scott Kerlin
Jeremy Straub
In developing a small spacecraft, the integration of numerous systems in a small area is a key challenge. It is easy to overlook how various component parts will integrate or have multiple sub-groups utilize un-filled space without realizing that they are creating a resource conflict. Additionally, the manufacturability of the final design is a key consideration. For all of these reasons, developing low-cost and incremental prototypes is a engineering ‘best practice’ for small spacecraft development.
Detecting Failures In Space Solar Power Systems With Pattern Recognition,
2015
SelectedWorks
Detecting Failures In Space Solar Power Systems With Pattern Recognition, Allen Mcdermott, Cameron Kerbaugh, Jeremy Straub
Jeremy Straub
This poster covers work relating to the use of expert systems and pattern recognition to attempt to identify, detect and prospectively stop patterns of activity that could potentially lead to failure of a space solar power (SSP) system. A database-based expert system has is presented to identify patterns, which can be used to determine whether a power beam could hit a unintend-ed target and potentially cause a calamity. This has been implemented via a facts-rule network via which supplied and collected facts and a rule set is used to de-termine whether the system is operating correctly (from a holistic perspective). …
An Expert System For Microwave Wireless Power Transmission Failure Prevention,
2015
SelectedWorks
An Expert System For Microwave Wireless Power Transmission Failure Prevention, Cameron Kerbaugh, Allen Mcdermott, Jeremy Straub
Jeremy Straub
Wireless power transfer (WPT) can be used to deliver space-generated power to ground stations through the use of microwave beams. WPT satellite power delivery systems have two major failure states: misdi-recting a beam and failing to send power to a station. This project has implemented an expert system to perform pattern recognition in an effort to prevent failures by analyzing the system state and predicting potential failures before they happen in support of space-based testing [1] and deployment [2].
Update On The Progress Of The 1-U Open Cubesat Development,
2015
SelectedWorks
Update On The Progress Of The 1-U Open Cubesat Development, Jeremy Straub, Ronald Marsh
Jeremy Straub
The OpenOrbiter program [1] is developing a low-cost framework for the creation of space-craft [2] by researchers and educators world-wide [3]. In line with the objective of enabling future educational use by others, educational assessment [4, 5] has been a key focus. Sever-al areas were assessed: students were asked what types of benefits they sought from their participation [6], assessment of benefit attain-ment is ongoing. Work on the development of a designs (See Figures 2 and 8) that can be used to build a spacecraft with a cost of under $5,000 [7] using primarily COTS parts and testing (see Figure …
Small Satellite Communication System Creation At The University Of North Dakota,
2015
SelectedWorks
Small Satellite Communication System Creation At The University Of North Dakota, Michael Hlas, Jeremy Straub, Ronald Marsh
Jeremy Straub
Software defined radios (SDRs) are poised to significantly enhance the future of small spacecraft communications. They allow signal processing to be performed on a computer by software rather than requiring dedicated hardware. The OpenOrbiter SDR (discussed in [1] and refined in [2]) takes data from the flight computer and converts it into an analog signal that is transmitted via the spacecraft antenna. Because the signal processing is done in software, the radio can be easily reconfigured. This process is done in reverse for incoming transmissions, which are received by the SDR and decoded by software. Figures 1 and 2 provide …
High Powered Composite Payload Fairing Rocket For Deployable Robotics,
2015
University of Alabama in Huntsville
High Powered Composite Payload Fairing Rocket For Deployable Robotics, Markus R. Murdy
Research Horizons Day Posters
No abstract provided.
Flow Induced Vibration On Piezoelectric Structures: Prediction, Experiment And Applications,
2015
University of Alabama in Huntsville
Flow Induced Vibration On Piezoelectric Structures: Prediction, Experiment And Applications, Felix Ewere
Research Horizons Day Posters
No abstract provided.
Comparison Of Radiation Dosage For Human Piloted Mars Missions Using Chemical, Nuclear Thermal, And Fusion Propulsion Systems,
2015
University of Alabama in Huntsville
Comparison Of Radiation Dosage For Human Piloted Mars Missions Using Chemical, Nuclear Thermal, And Fusion Propulsion Systems, Steven Doyle
Research Horizons Day Posters
No abstract provided.
Slip Length Crossover On A Graphene Surface,
2015
Missouri University of Science and Technology
Slip Length Crossover On A Graphene Surface, Zhi Liang, Pawel Keblinski
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Using Equilibrium and Non-Equilibrium Molecular Dynamics Simulations, We Study the Flow of Argon Fluid above the Critical Temperature in a Planar Nanochannel Delimited by Graphene Walls. We Observe that, as a Function of Pressure, the Slip Length First Decreases Due to the Decreasing Mean Free Path of Gas Molecules, Reaches the Minimum Value When the Pressure is Close to the Critical Pressure, and Then Increases with Further Increase in Pressure. We Demonstrate that the Slip Length Increase at High Pressures is Due to the Fact that the Viscosity of Fluid Increases Much Faster with Pressure Than the Friction Coefficient between …
Lift Generating Device,
2015
Embry-Riddle Aeronautical University
Lift Generating Device, Juan A. Alvarado
Publications
A lift generating device is provided enabling vertical flight. The lift generating device includes a first revolution structure having a funnel shape and a second revolution structure having a funnel shape. Each revolution structure includes a circular open surface and an open stem. The second revolution structure is attached to the first revolution structure by a plurality of connectors so as to form a gap between the first revolution structure and the second revolution structure. A propeller is coupled to an open stem at a bottom end of the first revolution structure and a motor is operatively connected to the …
Grid And Solution Adaptation Via Direct Optimization Methods,
2015
University of Akron, main campus
Grid And Solution Adaptation Via Direct Optimization Methods, Ajay Mahajan
Dr. Ajay Mahajan
At present all numerical schemes based on some form of differencing approach are plagued by some lack of accuracy when compared to the exact solution. This lack of accuracy can be attributed to the presence of truncation error in the numerical method. Traditionally the error can be reduced by increasing the number of mesh points in the discrete domain or by implementing a higher order numerical scheme. In recent times the approach has taken a more intelligent direction where adaptation or distribution of the mesh points is affected in such a way to reduce the error. However, grid adaptation with …
Review Of Seal Designs On The Apollo Spacecraft,
2015
The Unversity of Akron, Main Campus
Review Of Seal Designs On The Apollo Spacecraft, Joshua Finkbeiner, Patrick Dunlap, Bruce Steinetz, Christopher Daniels
Dr. Christopher C Daniels
The Apollo spacecraft required a variety of seal designs to support human spaceflight to the moon and to return the crew safely to Earth. High-temperature seals were required for gaps in the thermal protection system to protect the underlying structures from the high heating environment of super orbital reentry. Reliable pressure seals were also required to prevent the loss of habitable atmosphere during missions to the moon...
