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Aerospace Engineering Commons

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5,806 full-text articles. Page 190 of 199.

Analysis Of F-104c World's Altitude Record Flight, William J. Day 2010 California Polytechnic State University - San Luis Obispo

Analysis Of F-104c World's Altitude Record Flight, William J. Day

Aerospace Engineering

No abstract provided.


Design, Fabrication, Structural Testing, And Numerical Analysis Of A Small Scale Composite Wing, Jacob David Gaunt, Juan Carlos Flores, Vincent Andrew Perry 2010 Califoria Polytechnic State University, San Luis Obispo

Design, Fabrication, Structural Testing, And Numerical Analysis Of A Small Scale Composite Wing, Jacob David Gaunt, Juan Carlos Flores, Vincent Andrew Perry

Aerospace Engineering

A small scale composite wing based on a design found on an experimental aircraft was designed, constructed, and tested dynamically and statically. The wing was constructed similarly to an experimental aircraft wing. The performed static test was intended to produce pure bending. Strain gages were used to measure strains on the wing structure. The strains were converted to stresses to aid in analysis. The static test results suggested that the wing was actually under torsion. Four structural modes were found from the static test. A finite element analysis model was made to compare experimental results to numerical analytical results. The ...


Cal Poly Flight Test Platform For Instrument Development, Kyle Schaller, Ian Muceus, Aaron Ells 2010 California Polytechnic State University - San Luis Obispo

Cal Poly Flight Test Platform For Instrument Development, Kyle Schaller, Ian Muceus, Aaron Ells

Aerospace Engineering

This report summarizes a six month effort to conceptually design, develop, and build an unmanned aerial vehicle to test a boundary layer data system (BLDS) developed by Dr. Russell Westphal and his team of mechanical engineering senior design students. The project is funded by Edwards Air Force Base and the United States Air Force Research Laboratory. During the first Cal Poly quarter of project work, January 4, 2010 to March 18, 2010, the team completed a conceptual and preliminary design. During the second quarter, March 18, 2010 to June 12, 2010, the team completed the construction and initial flight test ...


Hybrid Rocket Motor, Zach Arena, Alexander Athougies, Alden Rodulfo 2010 California Polytechnic State University - San Luis Obispo

Hybrid Rocket Motor, Zach Arena, Alexander Athougies, Alden Rodulfo

Aerospace Engineering

This project involves the re-design, manufacturing, and testing of the Cal Poly Space System’s 4th iteration of an M-class 98mm hybrid rocket motor. This motor utilizes hydroxyl-terminated polybutadiene as fuel with liquid nitrous oxide as the oxidizer. Modeling and analysis was conducted on a 12 port self-impinging swirl injector and fuel manufacturing to improve performance. Several hot and cold flow tests were conducted to validate the analysis and predict performance values. Test results included two test fires resulting in an average of 212 lbf of thrust for 6 seconds with an Isp of 160 seconds and an average thrust ...


Matlab® Gui Visualization Of Classical Orbital Elements, Nancy Teresa Cabrera 2010 California Polytechnic State University – San Luis Obispo

Matlab® Gui Visualization Of Classical Orbital Elements, Nancy Teresa Cabrera

Aerospace Engineering

The classical orbital elements of an orbit are eccentricity, angular momentum, inclination, right ascension of ascending node, true anomaly, and argument of perigee. These six parameters define an orbit. Using MATLAB® to model a satellite orbiting Earth in three dimensions, a graphical user interface was created to allow a user to manipulate the orbital elements to desired quantities. In doing so, each parameter’s impact on the orbit is visually displayed. This furthers the understanding of how the parameters are linked to the orbit. When the interface is first opened, the default circular orbit has a range of 20,000 ...


Cubesat Developers' Workshop 2010, Tracy Owens, Ryan Race 2010 California Polytechnic State University - San Luis Obispo

Cubesat Developers' Workshop 2010, Tracy Owens, Ryan Race

Communication Studies

This project is the narrative component of the 7th Annual CubeSat Developers' Workshop 2010 planning process. It reviews the steps and team dynamics over the seven months spent coordinating the conference for the Aerospace Department. It was the first time that students from the Communcation Studies Department were brought in to help with the event, and the gap between the College of Liberal Arts and the College of Engineering was bridged.


Non-Explosive Actuator Simulator, Bryan Costanza 2010 California Polytechnic State University - San Luis Obispo

Non-Explosive Actuator Simulator, Bryan Costanza

Aerospace Engineering

The CubeSat group at California Polytechnic State University, San Luis Obispo discovered the need for a new piece of ground test equipment. Previous testing of the non-explosive actuator has been very expensive and is not repeatable; two undesirable traits. The analysis of the fuse as well as the design and test of the simulator concept and final article is discussed. The simulator has already seen real use and its entire build and operation cost is much less than the cost of one test of the actual hardware. Performance of the simulator based on burn time and reset time is acceptable ...


Autonomous Control Of The Cal Poly Motion Flight Simulator, Andrew M. Anderson 2010 California Polytechnic State University - San Luis Obispo

Autonomous Control Of The Cal Poly Motion Flight Simulator, Andrew M. Anderson

Aerospace Engineering

An autonomous controller for the Cal Poly Motion Flight Simulator was developed such that the simulated Van’s RV-7 flies a standard light aircraft traffic pattern without any human pilot input. First, an autopilot was developed in Simulink to control the aircraft’s altitude, airspeed, and heading independent of each other. The performance of the autopilot has been tested to perform with a response sufficient for precise navigation. A C++ s- function was written as a mission controller that followed a pre-programmed path around a known airport. The aircraft performs a standard left 45 degree entry into the traffic pattern ...


Uav Pirates And Silentrack Integration, Travis Dean, Hushnak Singh, Ashley Wager, Matthew (Matt) Woolridge 2010 California Polytechnic State University - San Luis Obispo

Uav Pirates And Silentrack Integration, Travis Dean, Hushnak Singh, Ashley Wager, Matthew (Matt) Woolridge

Electrical Engineering

The integration of the UAV pirating system with the SilenTrack video tracking system will allow the combined system to automatically identify and track a suspicious air vehicle visually as well as identify and decode the RF control signal. Once a threat has been identified, the system will execute an algorithm to associate each control channel with the corresponding flight control surface. Once the control channels have been decoded the user can use a hand held radio controller to maneuver the drone which is now under their command.


Strength And Efficiency During Lap Joining Molding Of Gmt‐Sheet, Jin-Woo Kim, Hyoung-Seok Kim, Dong-Gi Lee 2010 Iowa State University

Strength And Efficiency During Lap Joining Molding Of Gmt‐Sheet, Jin-Woo Kim, Hyoung-Seok Kim, Dong-Gi Lee

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations

In order to substitute and recycle the existing automobile parts for GMT‐Sheet, researches on the effects of GMT‐Sheet on the establishment of precise joining strength, joining condition that are lap length of joining part, compression ratio, and closure speed must be carried out but until now, there is almost no case of systematic researches on joint of GMT‐Sheet. Therefore, as there are many obstacles in joining of GMT‐Sheet molding products or in production of stable molding products, the researches on these issues are required. Because of this, it is reality that GMT‐Sheet is only applied ...


Numerical Examination Of Flow Field Characteristics And Fabri Choking Of 2d Supersonic Ejectors, Brett G. Morham 2010 California Polytechnic State University - San Luis Obispo

Numerical Examination Of Flow Field Characteristics And Fabri Choking Of 2d Supersonic Ejectors, Brett G. Morham

Master's Theses and Project Reports

An automated computer simulation of the two-dimensional planar Cal Poly Supersonic Ejector test rig is developed. The purpose of the simulation is to identify the operating conditions which produce the saturated, Fabri choke and Fabri block aerodynamic flow patterns. The effect of primary to secondary stagnation pressure ratio on the efficiency of the ejector operation is measured using the entrainment ratio which is the secondary to primary mass flow ratio.

The primary flow of the ejector is supersonic and the secondary (entrained) stream enters the ejector at various velocities at or below Mach 1. The primary and secondary streams are ...


Applied System Identification For A Four Wheel Reaction Wheel Platform, Seth F. Silva 2010 California Polytechnic State University - San Luis Obispo

Applied System Identification For A Four Wheel Reaction Wheel Platform, Seth F. Silva

Master's Theses and Project Reports

Applied System Identification for a Four Wheel Reaction Wheel Platform

By

Seth Franklyn Silva

At the California Polytechnic State University, San Luis Obispo there is a four-wheel reaction wheel pyramidal simulator platform supported by an air-bearing. This simulator has the current capability to measure the wheel speeds and angular velocity of the platform, and with these measurements, the system identification process was used to obtain the mass properties of this simulator. A handling algorithm was developed to allow wireless data acquisition and command to the spacecraft simulator from a “ground” computer allowing the simulator to be free of induced torques ...


A Three Dimensional Vortex Particle-Panel Code For Modeling Propeller-Airframe Interaction, Jacob S. Calabretta 2010 California Polytechnic State University - San Luis Obispo

A Three Dimensional Vortex Particle-Panel Code For Modeling Propeller-Airframe Interaction, Jacob S. Calabretta

Master's Theses and Project Reports

Analysis of the aerodynamic effects of a propeller flowfield on bodies downstream of the propeller is a complex task. These interaction effects can have serious repercussions for many aspects of the vehicle, including drag changes resulting in larger power requirements, stability changes resulting in adjustments to stabilizer sizing, and lift changes requiring wing planform adjustments.

Historically it has been difficult to accurately account for these effects at any stage during the design process. More recently methods using Euler solvers have been developed that capture interference effects well, although they don't provide an ideal tool for early stages of aircraft ...


Aircraft Data Collection System, Amy Kronsteiner, Danny Marx, Collin Heller, Nathaniel Garcia, Nicholas Riccobono, Scott Parks, Albert Liu 2010 California Polytechnic State University, San Luis Obispo

Aircraft Data Collection System, Amy Kronsteiner, Danny Marx, Collin Heller, Nathaniel Garcia, Nicholas Riccobono, Scott Parks, Albert Liu

Biomedical Engineering

This report outlines the design and building process for an interchangeable testing device that collects aircraft performance data. Included is the project objectives, system requirements, management plan, design concept development, design details, manufacturing procedures, and project verification test plans. The device is a wing-mounted Pitot-static system integrated with an Electronic Flight Instrument System (EFIS).


Novel Inverse Airfoil Design Utilizing Parametric Equations, Kevin A. Lane 2010 California Polytechnic State University – San Luis Obispo

Novel Inverse Airfoil Design Utilizing Parametric Equations, Kevin A. Lane

Master's Theses and Project Reports

The engineering problem of airfoil design has been of great theoretical interest for almost a century and has led to hundreds of papers written and dozens of methods developed over the years. This interest stems from the practical implications of airfoil design. Airfoil selection significantly influences the application's aerodynamic performance. Tailoring an airfoil profile to its specific application can have great performance advantages. This includes considerations of the lift and drag characteristics, pitching moment, volume for fuel and structure, maximum lift coefficient, stall characteristics, as well as off-design performance.

A common way to think about airfoil design is optimization ...


Development Of A Meshless Method To Solve Compressible Potential Flows, Alejandro Ramos 2010 Cal Poly San Luis Obispo

Development Of A Meshless Method To Solve Compressible Potential Flows, Alejandro Ramos

Master's Theses and Project Reports

The utility of computational fluid dynamics (CFD) for solving problems of engineering interest has experienced rapid growth due to the improvements in both memory capacity and processing speed of computers. While the capability now exists for the solution of the Navier-Stokes equations about complex and complete aircraft configurations, the bottleneck within the process is the time consuming task of properly generating a mesh that can accurately solve the governing partial differential equations (PDEs). This thesis explored two numerical techniques that attempt to circumvent the difficulty associated with the meshing process by solving a simplified form of the continuity equation within ...


Modified Sequential Kriging Optimization For Multidisciplinary Complex Product Simulation, Wang Hao, Wang Shaoping, Mileta M. Tomovic 2010 Old Dominion University

Modified Sequential Kriging Optimization For Multidisciplinary Complex Product Simulation, Wang Hao, Wang Shaoping, Mileta M. Tomovic

Engineering Technology Faculty Publications

Directing to the high cost of computer simulation optimization problem, Kriging surrogate model is widely used to decrease the computation time. Since the sequential Kriging optimization is time consuming, this article extends the expected improvement and put forwards a modified sequential Kriging optimization (MSKO). This method changes the twice optimization problem into once by adding more than one point at the same time. Before re-fitting the Kriging model, the new sample points are verified to ensure that they do not overlap the previous one and the distance between two sample points is not too small. This article presents the double ...


Assessment Of Carbon-Phenolic-In-Air Chemistry Models For Atmospheric Reentry, Alexandre Martin, Iain D. Boyd 2010 University of Michigan

Assessment Of Carbon-Phenolic-In-Air Chemistry Models For Atmospheric Reentry, Alexandre Martin, Iain D. Boyd

Alexandre Martin

Recent and future re-entry vehicle designs use ablative material as the main component of the heat shield of their thermal protection system. In order to properly predict the behavior of the vehicle, it is imperative to take into account the gases produced by the ablation process when modeling the reacting flow environment. In the case of charring ablators, where an inner resin is pyrolyzed at a relatively low temperature, the composition of the gas expelled in the boundary layer is complex and might lead to thermal chemical reactions that cannot be captured with simple flow chemistry models. In order to ...


Mesh Tailoring For Strongly Coupled Computation Of Ablative Material In Nonequilibrium Hypersonic Flow, Alexandre Martin, Iain D. Boyd 2010 University of Michigan - Ann Arbor

Mesh Tailoring For Strongly Coupled Computation Of Ablative Material In Nonequilibrium Hypersonic Flow, Alexandre Martin, Iain D. Boyd

Alexandre Martin

A one-dimensional material response implicit solver with surface ablation and pyrolysis is strongly coupled to LeMANS, a CFD code for the simulation of weakly ionized hypersonic flows in thermo-chemical non-equilibrium. Using blowing wall boundary conditions and a moving mesh algorithm, the results of a strongly coupled solution of a sample re-entry problem are presented. Because of the requirement of a coupling scheme, an Arbitrary Lagrangian-Eulerian (ALE) approach is used to compute the flux, allowing the mesh to move as the surface ablates. However, as the shape of the vehicle changes, the shock location and geometry are also modified. Using the ...


Delamination Of Sandwich Composites, Richard Anthony Davis 2010 California Polytechnic State University - San Luis Obispo

Delamination Of Sandwich Composites, Richard Anthony Davis

Aerospace Engineering

The use of shear keys to help stop or inhibit the face-sheet core delamination of sandwich composite beams under monotonic loading was analyzed in Cal Poly’s structural design lab. The composite beams were treated with the same boundary conditions as the ASTM D5528 double cantilever beam bending in which both faces of the beam remain free; one of the faces would have a debonded side and the other would not. An aluminum tab is attached to the top of the specimens and the load is applied there. Each specimen has piezoelectric sensors that are utilized in the detection of ...


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