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Browse Dept. of Aerospace Engineering by Title
Now showing items 451-470 of 506
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(2017-04-25)The supersonic flow separating past a cylindrical afterbody generates a complex, compressible and highly turbulent flowfield. This flow models several realistic applications, such as the wake region behind projectiles, ...
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(2019-04-23)This thesis focuses on the design and optimization of modular, reconfigurable, hosted payload platforms operating in Earth orbit. Recent advancements in on-orbit servicing technologies and robotics are creating a market ...
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(1995)The stability and bifurcation behavior of mechanical systems parametrically excited by small periodic or stochastic perturbations is studied. In the case of random excitation, the almost-sure and moment asymptotic stability ...
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(1993)Almost-sure asymptotic stability of 3 and 4 dimensional co-dimension two dynamical systems under small intensity stochastic excitations is investigated. The method of stochastic averaging is used to derive a set of approximate ...
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(2017-07-14)The utilization of synchronous machines in electric power systems as central generators and in electric drive applications as high-performance motors makes their modeling, simulation, state estimation, and analysis important ...
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(2001)The importance of resonances and the effect of near-resonant motion of trajectories on the averaged dynamics of stochastically perturbed two-degrees of freedom integrable systems is emphasized throughout the study. The ...
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(2004)Finite element models of the SMAT microflap and DMA specimens were created by incorporating a user material subroutine SMA-UMAT in ABAQUS. Model results were verified by correlation with the DMA experimental results. The ...
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(2014-01-16)High performance aramid fibers, such as Kevlar, AuTx, and Twaron have been designed for ultra-high specific strength and stiffness. These fibers derive their superior properties from the high degree of molecular orientation ...
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(2015-01-21)Silicon is an important electrode material for next generation high performance lithium ion batteries due to its order of magnitude higher charge carrying capacity compared to conventional graphite electrodes. The main ...
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(2013-08-22)The current study investigates the structural modifications imposed in fully-developed turbulent channel flow by an isolated, wall-mounted circular cylinder. The cylinder height is chosen to specifically extend into the ...
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(2011-01-14)In recent work, the performance of the Electric Oxygen-Iodine Laser (ElectricOIL), developed in partnership by researchers at the University of Illinois and CU Aerospace, has been greatly improved through systematic study ...
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(1997)The fraction of multiline power obtained in the line selected mode was independent of cavity losses and flow rate. Even though the magnitude of the line selected power increased, the fraction of multiline performance was ...
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(2011-08-25)This thesis presents several new open-loop guidance methods for spacecraft swarms comprised of hundreds to thousands of agents with each spacecraft having modest capabilities. These methods have three main goals: preventing ...
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(1998)To validate the control algorithms experimentally, a complete controller for swing-up and balancing has been designed and implemented on the Pendubot, a two-link underactuated robot. The parameters of the Pendubot were ...
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(2012-12)This thesis makes three theoretical contributions to the robust system analysis and control theory. First, we revisit a central theorem in robust control theory known as the the Kalman-Yakubovich-Popov (KYP) lemma, and ...
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(1994)A new method is presented for the synthesis of dynamic Green's functions of complex distributed parameter systems from previously known Green's functions of their elemental substructures. The method allows for the incorporation ...
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Now showing items 451-470 of 506