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Dynamic Response Of Textile Material Under Transverse Impact, Yuchen Zheng, Matthew C. Hudspeth, Weinong W. Chen 2014 Purdue University

Dynamic Response Of Textile Material Under Transverse Impact, Yuchen Zheng, Matthew C. Hudspeth, Weinong W. Chen

The Summer Undergraduate Research Fellowship (SURF) Symposium

Textile materials, such as Dyneema and Kevlar, are the major raw materials for state of the art military or personal security armor vests. However, in impact experiments, actual observed penetration speed is much lower than theoretically predicted penetration speed. Each armor vest is composed of high performance yarns which are woven together to form fabrics, which when stacked together form a vest. Understanding penetration behavior of yarns is essential to evaluate the performance of fabric, which will be useful for the design of better vests. The project is composed of three parts: static experiments, dynamic yarn experiments and dynamic fabric ...


Noise Source Analysis For Simulated Turbulent Jets, Robert W. Skidmore, Nitin S Dhamankar, Kurt M. Aikens, Gregory Blaisdell 2014 Purdue University

Noise Source Analysis For Simulated Turbulent Jets, Robert W. Skidmore, Nitin S Dhamankar, Kurt M. Aikens, Gregory Blaisdell

The Summer Undergraduate Research Fellowship (SURF) Symposium

Large Eddy Simulation (LES) is an efficient computational approach to study turbulent flows and has seen increasing application to the study of jet noise. The main challenge of LES has been the realistic simulation of experiments at reasonable cost. Recent LES studies have been realistic enough to gain important insight into jet noise from the large amount of data generated. This study attempts to characterize the sources of noise from a turbulent jet via analysis of the LES results. Three different analysis tools are implemented. The first two are comparable to analyses used on experimental data: two-point cross-correlations between far-field ...


Dynamic Analysis Of Granular Battery Assembly, Rohan Dudaney, Waterloo Tsutsui, Weinong Chen 2014 Purdue University

Dynamic Analysis Of Granular Battery Assembly, Rohan Dudaney, Waterloo Tsutsui, Weinong Chen

The Summer Undergraduate Research Fellowship (SURF) Symposium

Collisions and impacts are an inevitable reality when it comes to commercial cars and vehicles, but as batteries become more prevalent it is vital to understand how they react dynamically and as a system to better protect both the passengers and toxic chemicals inside of the batteries. One potential solution is to surround these batteries with non-vital tubes that can be sacrificed and help protect the batteries. This study is done to understand the structure of batteries and to test how an assembly of sacrificing cells and batteries reacts in an impact situation to see if there is significant energy ...


Fiber Length And Orientation In Long Carbon Fiber Thermoplastic Composites, Imad Hanhan, Connor Sullivan, Bhisham Sharma, Michael Sangid 2014 Purdue University

Fiber Length And Orientation In Long Carbon Fiber Thermoplastic Composites, Imad Hanhan, Connor Sullivan, Bhisham Sharma, Michael Sangid

The Summer Undergraduate Research Fellowship (SURF) Symposium

Carbon fiber composites have become popular in aerospace applications because of their lightweight yet strong material properties. The injection molding process can be used to produce discontinuous fiber composites using less time and resources than traditional methods, thereby broadening carbon fiber composites’ applications in different industries. Utilization of longer fibers offers more load carrying capability and superior strength properties for injected molded composites. Since the fiber length and the orientation distribution in Long Fiber Thermoplastics (LFTs) directly affects LFT composites’ material properties, there is a need to study the microstructure of LFTs and characterize fiber length and orientation distributions. Therefore ...


Simulation Of Bio-Inspired Porous Battery Electrodes, Raju Gupta, R. Edwin Garcia, Rui Tu 2014 Purdue University

Simulation Of Bio-Inspired Porous Battery Electrodes, Raju Gupta, R. Edwin Garcia, Rui Tu

The Summer Undergraduate Research Fellowship (SURF) Symposium

Advancement of technology has led to the increase in use of electronic devices. However, longer life of the rechargeable battery used in electronic devices is one of the biggest issue and demand in the world of electronic devices at present. Battery's performance is affected by the orientation, arrangement, shape and size, and porosity of the materials out of which battery electrodes are made. The goal of this project is to develop a set of numerical libraries that allow developing material micro structures that will allow increasing the performance of rechargeable batteries. We focused on the development of an algorithm ...


Microthruster Fabrication And Characterization: In Search Of The Optimal Nozzle Geometry For Microscale Rocket Engines, Katherine L. Fowee, Alina Alexeenko 2014 Purdue University

Microthruster Fabrication And Characterization: In Search Of The Optimal Nozzle Geometry For Microscale Rocket Engines, Katherine L. Fowee, Alina Alexeenko

The Summer Undergraduate Research Fellowship (SURF) Symposium

A major consideration in microsatellite design is the engineering of micropropulsion systems that can deliver the required thrust efficiently with tight restrictions on space, weight, and power. Cold gas thrusters are one solution to the demand for smaller propulsion systems to accommodate the advancements in technology that have allowed for a reduction in the size and thus the cost of satellites. While much research has been done in understanding the flow regimes within these microthrusters, there is a need to understand how different nozzle designs affect microthruster performance. This requires that experimental data be collected on varying nozzles shapes (orifices ...


Increasing Participation In The Pilot Weather Reporting (Pirep) System Through User Interface Design, Stephen M. Casner 2014 Purdue University

Increasing Participation In The Pilot Weather Reporting (Pirep) System Through User Interface Design, Stephen M. Casner

Journal of Aviation Technology and Engineering

Although pilots regard pilot weather reports (PIREPs) as valuable flight planning resources, the number of PIREPs that pilots submit is relatively small. In a previous survey, pilots indicated that submitting PIREPs sometimes requires too much effort, and that they are often unable to recall the information fields required to complete a report. Pilots also indicated that the idea of submitting a PIREP often does not occur to them, and that they feel that other pilots are mainly interested in receiving reports about severe weather. In this study the authors attempt to address obstacles to submitting PIREPs by proposing two alternative ...


Validation Of New Technology Using Legacy Metrics: Examination Of Surf-Ia Alerting For Runway Incursion Incidents, Robert Joslin 2014 Purdue University

Validation Of New Technology Using Legacy Metrics: Examination Of Surf-Ia Alerting For Runway Incursion Incidents, Robert Joslin

Journal of Aviation Technology and Engineering

This study demonstrated an innovative method of utilizing expert raters and actual high-risk incidents to identify shortcomings of using legacy metrics to measure the effectiveness of new technology designed to mitigate hazardous incidents. Expert raters were used to validate the Enhanced Traffic Situational Awareness on the Airport Surface with Indications and Alerts (SURF-IA) model for providing alerts to pilots to reduce the occurrence of pilot deviation type runway incursion incidents categorized as serious (Category A or B) by the legacy FAA/ICAO Runway Incursion Severity Classification (RISC) model. The study concluded that the SURF-IA model did not yield an outcome ...


Automated Image Interpretation For Science Autonomy In Robotic Planetary Exploration, Raymond Francis 2014 Western University

Automated Image Interpretation For Science Autonomy In Robotic Planetary Exploration, Raymond Francis

University of Western Ontario - Electronic Thesis and Dissertation Repository

Advances in the capabilities of robotic planetary exploration missions have increased the wealth of scientific data they produce, presenting challenges for mission science and operations imposed by the limits of interplanetary radio communications. These data budget pressures can be relieved by increased robotic autonomy, both for onboard operations tasks and for decision- making in response to science data.

This thesis presents new techniques in automated image interpretation for natural scenes of relevance to planetary science and exploration, and elaborates autonomy scenarios under which they could be used to extend the reach and performance of exploration missions on planetary surfaces.

Two ...


Characterization And Testing Of A 5.8 Kv Sic Pin Diode For Electric Space Propulsion Applications, Alexandra Toftul 2014 University of Nebraska - Lincoln

Characterization And Testing Of A 5.8 Kv Sic Pin Diode For Electric Space Propulsion Applications, Alexandra Toftul

Electrical Engineering Theses and Dissertations

Inductive Pulsed Plasma Thrusters (IPPTs) are a type of in-space propulsion that has multiple advantages over conventional chemical propulsion for long-duration, deep space missions. Existing IPPT prototypes utilize spark gap switches, however these are subject to corrosion problems that make them unreliable for long-term use. Recent advances in solid state switching technology have opened up a variety of switching options that could provide greater reliability, controllability, and increased energy efficiency. Taking advantage of this, a novel thruster drive circuit topology containing a high-power silicon controlled rectifier (SCR) and series fast recovery diode (FRD) is proposed that is expected to increase ...


Assessment Of Educational Expectations, Outcomes And Benefits From Small Satellite Program Participation, Jeremy Straub, Ronald Marsh 2014 SelectedWorks

Assessment Of Educational Expectations, Outcomes And Benefits From Small Satellite Program Participation, Jeremy Straub, Ronald Marsh

Jeremy Straub

This paper begins to characterize the educational outcomes that can be produced from student participation in a small spacecraft development program. We asked students what benefits they expected to receive from program participation and we asked them, at the end of the semester, what benefits they had received. We also characterized student performance through the use of post-participation Likert-like scale questions and the use of a widely-used questionnaire for assessing student research participation outcomes. We compare benefit expectation and attainment, characterize the level of benefits received across multiple types of participation and assess the effect of program participation on subject-specific ...


A Variety Of Configurations For Incorporating Actuation Components Into The Structural Members Of A Cubesat, Jeremy Straub 2014 SelectedWorks

A Variety Of Configurations For Incorporating Actuation Components Into The Structural Members Of A Cubesat, Jeremy Straub

Jeremy Straub

This paper describes the volume and mass challenges faced by designers utilizing the CubeSat form factor. It has considers the need to more effectively utilize the corner-spaces of the CubeSat, particularly when there is a need to incorporate narrow and long structures. It discusses several prospective approaches for incorporating long and narrow structures into a CubeSat and considers the prospective value of doing so.


A Two-Phase Development And Validation Plan For North Dakota's First Spacecraft, Jeremy Straub, Ronald Marsh 2014 SelectedWorks

A Two-Phase Development And Validation Plan For North Dakota's First Spacecraft, Jeremy Straub, Ronald Marsh

Jeremy Straub

The Open Prototype for Educational NanoSats (OPEN) aims to make space more accessible for educational and other uses by driving down the cost of CubeSat development. This paper presents a tentative plan for the use of two orbital missions as part of a two-phase technology demonstration sequence focusing on raising the technology readiness level (TRL) of OPEN to a level suitable for wide use and adoption. It presents an overview of a two-mission development plan including mission objectives, requirements and constraints. The paper considers how the phase one mission’s spacecraft may serve as a lower-cost platform for some users ...


A Novel Deployable Array Architecture For Micro To Full Sized Satellites, Benjamin Kading, Jeremy Straub, David Whalen 2014 SelectedWorks

A Novel Deployable Array Architecture For Micro To Full Sized Satellites, Benjamin Kading, Jeremy Straub, David Whalen

Jeremy Straub

This paper provides an overview of several techniques that can be used on spacecraft of various sizes to increase the longevity of onboard solar power generation capability and – in some cases – via this, overall mission life. Three designs that shield solar panels until they are needed for use and which can, prospectively, provide other benefits are presented. A conventional design is also discussed, for purposes of comparison. Mass and volume analysis is used to demonstrate the cost (in terms of mass and volume) for the proposed solutions and compare this to the benefit provided by the extension in mission lifespan ...


Particle Image Velocimetry Of Transverse Jets In Crossflow, Jesse K. Tsai, Kayla Kuzmich, David Forliti, Kriss Vanderhyde, Nils Sedano 2014 California Polytechnic State University

Particle Image Velocimetry Of Transverse Jets In Crossflow, Jesse K. Tsai, Kayla Kuzmich, David Forliti, Kriss Vanderhyde, Nils Sedano

STEM Teacher and Researcher (STAR) Program Posters

The jet in crossflow (JICF) has been an ongoing study for the past several decades with applications in the field of fluid mechanics. This particular flow field produces vortical structures tied to the entrainment and mixing of two separate fluids. Research of the JICF seeks to determine a model and trajectory scaling law for future designs. This will help future designers to optimize the mixing and homogeneity of the two fluids to decrease emissions from pollutants, make ignition easier, and improve combustion efficiency of rockets.

Our experiment will employ Particle Image Velocimetry (PIV) to determine the fluid motion of the ...


Foss Big Data Storage Solution, Gary L. Jaffe 2014 California Polytechnic State University

Foss Big Data Storage Solution, Gary L. Jaffe

STEM Teacher and Researcher (STAR) Program Posters

Utilizing the AERO Institute as an IT test bed or “sandbox”, a small-agile development team will design, build, and test a data management storage system to support post processing of archived and in-flight data collected with the Piccolo flight control system and Compact Fiber Optic Sensing System (C-FOSS). Both systems are integrated on the APV3 aircraft, a small remote-operated vehicle. Due to the amount of data collected from C-FOSS, a system will be designed to sort and organize large data sets. An open-source database will be explored as a viable solution to manage large data loads and provide multi-cluster system ...


Effect Of Adaptive Tabs On Drag Of A Square-Base Bluff Body, Brian W. Barker 2014 California Polytechnic State University

Effect Of Adaptive Tabs On Drag Of A Square-Base Bluff Body, Brian W. Barker

Master's Theses and Project Reports

This thesis involves the experimental wind tunnel testing of a 0.127m by 0.127m square-base bluff body to test the effectiveness of trailing edge tabulations to reduce drag in the Cal Poly 0.912m by 1.219 m low-speed wind tunnel. To accomplish this, the boundary layer was first measured on the trailing edge of the model for the three speeds at 10, 20, and 30 m/s, with Re = 8.3e4, 1.6e5 and 2.5e5 respectively, without the tabs. Three different tests were performed to determine the effectiveness of the tabs. These tests included base pressure measurements ...


Design And Fabrication Of A Low-Cost Turbine Engine Component Testbed (Tect), Joshua A. Hartman 2014 University of Tennessee, Knoxville

Design And Fabrication Of A Low-Cost Turbine Engine Component Testbed (Tect), Joshua A. Hartman

Masters Theses

With gas turbine engine testing becoming very expensive because of the increasing complexity involved with the engine, engine subsystems, and test support systems, a low-cost Turbine Engine Component Testbed (TECT) is proposed. This engine build is given the designation J1-H-02. In the present study, a small augmented gas turbine engine (GTE) is constructed. The TECT engine is built with modularity as a key design consideration to allow for flame-tube patterns and augmentor sections to be changed quickly for combustion experiments that have gained impetus due to combustion anomalies/instabilities inherent with future military engine augmentors. This testbed allows for an ...


Hybrid Rocket Design Study Utilizing Nozzle Cooling And Aft-End Vortex Oxidizer Injection, John Nicholas Quigley 2014 University of Tennessee, Knoxville

Hybrid Rocket Design Study Utilizing Nozzle Cooling And Aft-End Vortex Oxidizer Injection, John Nicholas Quigley

Masters Theses

The current study focused on two innovations intended to reduce the cost and enhance the performance of hybrid rockets. The majority of the emphasis was placed on the design, fabrication and testing of a 3-D printed, water cooled nozzle. This work was done as proof of concept to show that complex, high temperature components could be manufactured using these new techniques, thereby substantially bringing down fabrication costs and allowing configurations that are not feasible using traditional machining. A water-cooled calorimeter nozzle was made and used in thrust stand tests to verify analytic and numerical heating models used in the design ...


The Differences Are Not So Great: High Altitude Balloon And Small Spacecraft Software Development, Jeremy Straub, Ronald Marsh 2014 SelectedWorks

The Differences Are Not So Great: High Altitude Balloon And Small Spacecraft Software Development, Jeremy Straub, Ronald Marsh

Jeremy Straub

Previous work discussed critical differences in planning, developing hardware for and executing a high altitude balloon (HAB) mission. One area where this difference is less pronounced is in software development, allowing HABs to be utilized as a ‘software testbed’ for many orbital missions. This paper provides an overview of the software development process for both orbital and HAB craft, highlighting differences between the two processes and the numerous similarities. It concludes by presenting a framework for analyzing the suitability of HAB testing for small satellite software.


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