Browsing Electronic Theses, Dissertations, and Records of Study (2002– ) by Department "Aerospace Engineering"
Now showing items 21-40 of 577
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(Texas A&M University, 2007-09-17)The adaptive dynamic inversion control methodology uses dynamic inversion to calculate the control, and adaptation to compensate for the errors in the inversion due to model uncertainties. Traditionally, adaptive control ...
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Adaptive inverse modeling of a shape memory alloy wire actuator and tracking control with the model (2009-06-02)It is well known that the Preisach model is useful to approximate the effect of hysteresis behavior in smart materials, such as piezoactuators and Shape Memory Alloy(SMA) wire actuators. For tracking control, many researchers ...
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(2021-12-10)As the design of aerospace vehicles continues to evolve and become more complex, an accurate understanding of the physics at work in the flowfields around these vehicles is required. Alongside flight tests and wind tunnel ...
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(2015-06-04)Near-future space missions demand the delivery of massive payloads to deep space destinations. Given foreseeable propulsion technology, this is feasible only if we can design trajectories that require the smallest possible ...
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(2022-07-17)This proposal defines an advanced onboard navigation interface and trajectory design tool for future astronauts. As the space industry expands and becomes more commercialized, future spaceflight will include long-duration ...
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(2012-02-14)This thesis presents advances in reduced-order modeling based on proper orthogonal decomposition (POD) for single and two-phase flows. Reduced-order models (ROMs) are generated for two-phase gas-solid flows. A multiphase ...
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(2013-05-06)The goal of this dissertation is to consolidate the theoretical foundation of variable-resolution (VR) methods in general and the partially-averaged Navier-Stokes (PANS) approach in particular. The accurate simulation of ...
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(2013-11-08)This work describes and compares processes for swept-wing laminar flow control (SWLFC) aerody-namic design. It focuses on results obtained during the preliminary outer-mold-line (OML) design of the Subsonic Aircraft ...
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(2015-05-12)Aeroservoelasticity (ASE) is the interdisciplinary study of the interaction of structural, inertial, aerodynamic, and control loads for aircraft systems, and is inherently a nonlinear phenomenon. One of the goals of ASE ...
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(2022-04-21)Micro air vehicles are inherently susceptible to wind because of reduced inertia and have lower aerodynamic efficiency due to the poor performance of airfoils at low Reynolds numbers. Cyclorotors can potentially overcome ...
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(2021-07-14)With the recent advances in satellite miniaturization, communication and information technologies, there has been a paradigm shift in space exploration missions over the last few decades. This paradigm shift involves the ...
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(2012-11-12)Intelligence, surveillance, and reconnaissance unmanned aircraft systems (UAS) are the most common variety of UAS in use today and provide invaluable capabilities to both the military and civil services. Keeping the sensors ...
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(2016-12-13)Parasitic drag is a restrictive force for all vehicles moving through a fluid medium. In many industries and applications, even incremental reductions in drag could result in large savings in fuel, time, and even thermal ...
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(2012-09-18)This dissertation addresses the control problem for the general class of control non-affine, non-standard singularly perturbed continuous-time systems. The problem of control for nonlinear multiple time scale systems is ...
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(Texas A&M University, 2007-04-25)This research analyzes and demonstrates the local position determination problem on Earth using a novel instrument, the Compass Star Tracker. Special focus is given to the theoretical development of the mathematics of local ...
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(2011-10-21)Though the Aerospace industry is moving towards small satellites and smaller sensor technologies, sensors used for close-proximity operations are generally cost (and often size and power) prohibitive for University-class ...
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(2019-06-28)Gain-scheduling approach is a powerful tool but it only guarantees the local stability and performance for a slow varying system. Linear parameter varying (LPV) systems hence were developed to overcome this drawback. The ...
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(2010-01-16)The Multidisciplinary Design Optimization (MDO) system is needed to reduce the developing time and production cost in most industries. The MDO is the new technology for optimization design, and considers solid mechanics, ...
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(2016-11-18)During low speed maneuvers, such as landing and approach, a significant portion of the noise generated by transport aircraft is due to airframe noise. The leading-edge slat is a primary source of airframe noise. Previous ...
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(Texas A&M University, 2004-09-30)Textile composites can be tailored to meet specific thermo-mechanical requirements for structural applications. The focus of this research is on 2x2 biaxial braided composites since they have good stiffness and strength ...