Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 63 for “"Systems Engineering and Multidisciplinary Design Optimization"”.
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Dynamic Model Creation and Scripting Support in the Horizon Simulation Framework
<p>Dynamic model creation and support for the Lua scripting language was added to the Horizon Simulation Framework used for the verification and validation of system-level requirements. The addition of scripting support allows for subsystem models and their algorithms to be defined using a simpler …
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Preliminary Design of Blade and Disc Fixing for Aerospace Application using Multi-Disciplinary Approach
<p>The preliminary design phase of a turbine rotor has an important impact on the architecture of a new engine definition, as it sets the technical envelope of the product to be designed. Additionally, preliminary design cycle times are increasingly critical in capturing business opportunities in …
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An Automated Test Station Design Used to Verify Aircraft Communication Protocols
… is typically the costliest part of the systems engineering design process. In the commercial aircraft industry, as the software and hardware design evolves, it must be verified to conform to requirements. In addition, when new design releases are made, regression analysis must be …
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Whitespace Exploration
<p>As engineering systems grow in complexity so too must the design tools that we use evolve and allow for decision makers to efficiently ask questions of their model and obtain meaningful answers. The process of whitespace exploration has recently been developed to aid in engineering design and …
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Activity Node Based Flight Software as a Benefit to Systems Engineering
… discusses one application of a flight software design for a spacecraft in which the software executes from a database that can be managed by systems engineering. This report gives an overview of how such a software design can be developed and implemented. It also discusses why this approach is …
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Space Vehicle Testing
<p>Requirement verification and validation is a critical component of building and delivering space vehicles with testing as the preferred method. This Master’s Project presents the space vehicle test process from planning through test design and execution. It starts with an overview of the …
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Aeroelastic Analysis of a Flexible Membrane Wing
… appendage used to augment short field take off and landing (STOL) operations.</p> <p>Although flutter theory is now well understood, the LAS presents the complications of a highly deformable airfoil shape as well as larger structural damping values compared to metal wings.</p> <p>The proposed …
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The New Bicycle Model: Introducing Software Considerations Early Into the Systems Engineering Design and Integration Process
<p>Lockheed Martin Space Systems Company, Sunnyvale, California is in the business of designing and engineering satellites for commercial and government customers. This task is by no means a trivial endeavor but Lockheed MartinSunnyvale has many decades of experience in Systems Engineering. …
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Cultivating Creativity in Aerospace Systems Engineering to Manage Complexity
… has been increasing, leading to large budget and schedule overruns. Many of the risks of complex system development can be attributed to the inadequacy of linear methods when applied to nonlinear domains, i.e., oversimplification in a program amplifies the amount of risk produced when a system …
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CubeSat Astronomy Mission Modeling Using the Horizon Simulation Framework
… platform that can complement existing systems utilized for astronomical research by undergraduate and high school students. Much research and development work has been performed to develop model-based system engineering methodologies and products for CubeSat missions, including the …
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Quantifying Seismic Risk for Portable Ground Support Equipment at Vandenberg Air Force Base
… evaluate the seismic risk for portable GSE at Vandenberg Air Force Base. Using the latest probability data available from the USGS, risk thresholds are defined for portable GSE having the potential to cause a catastrophic event. Additionally, an example tool for design engineers was developed …
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Modeling Launch Vehicle Success Using Artificial Neural Networks
… dollars in spacecraft replacement, lost revenue, and other expenses. These costs are passed on in higher insurance rates and launch vehicle price. If the launch outcome of the launch vehicles could be better predicted, the overall cost of launching payloads into space would decrease. This study …
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Dynamic Simulation of General Aviation Cabin Environments and Occupant Restraint Systems
… effort a simplified system of masses, springs, and dampers are used to simulate the more complex configuration of cabin structure, seat, pilot, and restraints on a personal computer. The primary objective of this study is to accurately simulate the motions observed in real life tests performed …
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Optimized Engine Out Procedures to Extend the Range of Jet Transport Airplanes
… optimum engine-out procedures for the Boeing 747 and 767 on extended flights that will increase the range of the aircraft in case of engine failure. Theory suggests that an optimum amount of bank angle that will minimize drag resulting from asymmetric thrust in a multiengine airplane experiencing …
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Development of Automatic CFD Grid Generation for the Design of the Preliminary Wing Sweep Schedule for the Gulfstream Quiet Supersonic Jet
… for the Gulfstream Quiet Supersonic Jet (wing and body) was investigated using CFD analysis methods. The use of automating the gridding procedure allowed for numerous cases to be investigated. The examination of the drag polar for different Mach cases indicated the optimum corresponding wing …
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Development of Fault Tolerant Adaptive Control Laws for Aerospace Systems
<p>The main topic of this dissertation is the design, development and implementation of intelligent adaptive control techniques designed to maintain healthy performance of aerospace systems subjected to malfunctions, external parameter changes and/or unmodeled dynamics. The dissertation is focused …
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Project Management and Systems Engineering Framework for Educational Cubesat Missions
<p>The rising complexity of CubeSat missions and the unique challenges faced by educational CubeSat programs lead to high rates of mission failure. Implementing project management and systems engineering practices can alleviate these challenges and improve mission success rates for educational …
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Testing and Verification for the Open Source Release of the Horizon Simulation FrameworTesting and Verification for the Open Source Release of the Horizon Simulation Framework
<p>Modeling and simulation tools are exceptionally useful for designing aerospace systems because they allow engineers to test and iterate designs before committing the massive resources required for system realization. The Horizon Simulation Framework (HSF) is a time-driven modeling and simulation …
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SysML Output Interface and System-Level Requirement Analyzer for the Horizon Simulation Framework
<p>Model-Based Systems Engineering in industry has been constantly increasing its presence within the aerospace industry. SysML is one such MBSE tool that shows complex system organization and relationships. The Horizon Simulation Framework is another MBSE tool, created by Cal Poly students, that …
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An Iteration on the Horizon Simulation Framework to Include .NET and Python Scripting
<p>Modeling and Simulation is a crucial element of the aerospace engineering design pro- cess because it allows designers to thoroughly test their solution before investing in the resources to create it. The Horizon Simulation Framework (HSF) v3.0 is an aerospace modeling and simulation tool that …
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