Aerospace Engineering Commons^™

Programs With Rockets, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs on "Programs with Rockets" from April 5, 2010.

Smore Phase 2: An Upgrade In Valve Systems & Startup Procedure For A Small Methanol Oxygen Liquid Rocket Engine, Christian Soria

Aerospace Engineering

A Methanol-Oxygen liquid rocket engine was designed and manufactured under the California Polytechnic State University Aerospace Department by students in a graduate level rocket propulsion class. The SMORE, previously known as the KORE, is now in an ongoing testing and developing stage with plans to incorporate it into the aerospace undergraduate propulsion lab. Phase 2 of the liquid rocket engine development is to produce a start-up procedure that will improve the safety due to manual operation and poor ignition conditions. A propane ignition system along with the implementation of electrically operated solenoid valves to control the fuels and oxidizer were …

Autonomous Satellite Operations For Cubesat Satellites, Jason Lionel Anderson

Master's Theses

In the world of educational satellites, student teams manually conduct operations daily, sending commands and collecting downlinked data. Educational satellites typically travel in a Low Earth Orbit allowing line of sight communication for approximately thirty minutes each day. This is manageable for student teams as the required manpower is minimal. The international Global Educational Network for Satellite Operations (GENSO), however, promises satellite contact upwards of sixteen hours per day by connecting earth stations all over the world through the Internet. This dramatic increase in satellite communication time is unreasonable for student teams to conduct manual operations and alternatives must be …

On The Benefits Of In-Flight System Identification For Autonomous Airdrop Systems, Michael Ward, Mark Costello, Nathan Slegers

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

A unique feature of airdrop systems is the inherent and large variability in flight dynamic characteristics. The same physical article dropped on two different occasions will exhibit significantly different dynamic response. The problem only becomes worse for different test articles. Control systems for autonomous airdrop systems explicitly or implicitly assume knowledge of the flight dynamic characteristics in some way, shape, or form. A question facing autonomous airdrop designers is whether to use precomputed dynamic characteristics inside the control law, or to compute the needed flight dynamic characteristics in-flight and subsequently employ them in the control law. This paper establishes conditions …

Exomedicine Synthesis Paper, Rita Briggs

Robert "Bob" Twiggs STEM Education Collection

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

Fusion Of Imprecise Qualitative Information, Florentin Smarandache, Xinde Li, Xianzhong Dai, Jean Dezert

Branch Mathematics and Statistics Faculty and Staff Publications

In this paper, we present a new 2-tuple linguistic representation model, i.e. Distribution Function Model (DFM), for combining imprecise qualitative information using fusion rules drawn from Dezert-Smarandache Theory (DSmT) framework. Such new approach allows to preserve the precision and efficiency of the combination of linguistic information in the case of either equidistant or unbalanced label model. Some basic operators on imprecise 2-tuple labels are presented together with their extensions for imprecise 2-tuple labels. We also give simple examples to show how precise and imprecise qualitative information can be combined for reasoning under uncertainty. It is concluded that DSmT can deal …

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.

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.

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.

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.

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.

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.

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.

An Experiment On Integrated Thermal Management Using Metallic Foam, Derek M. Geiger

Master's Theses

This report details an approach to using metal foam heat exchangers inside an integrated thermal management system on a variable cycle engine. The propulsion system of interest is a variable cycle engine with an auxiliary, variable flow rate fan. The feasibility of utilizing an open-celled metallic foam heat exchanger in the ducting between the constant and variable-fans on this variable cycle engine to cool the avionics was explored using an experimental approach. Two heat exchangers, 6.3 inch width by 6.3 inch length by 0.5 inch thickness, were constructed from 20 and 40 pores per inch (PPI) metal foam and tested. …

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 …

Development Of A New Mixed Mode I-Ii-Iii Delamination Toughness Test, Ruben Hortensius

Renée Crown University Honors Thesis Projects - All

Optimal use of laminated composite materials can only be achieved if its most common failure mechanisms are well understood. One of the most common modes of failure in laminates is delamination, or the separation of adjacent material layers. Therefore, there is a need to be able to predict a laminated composite’s resistance to delamination growth due to the complex real-world application loadings that it may experience. These complex loadings are made up of three primary modes of delamination growth, known as modes I, II, and III. Test fixtures for a new mixed mode I-II-III delamination toughness test were designed, built, …

Smallsats, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "SmallSats" from April 30 2009.

Satellite Earth Observation And Surveillance Payloads, Rainer Sandau

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Rainer Sandau titled "Satellite Earth observation and surveillance payloads" from April 9, 2009.