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Browse Dept. of Aerospace Engineering by Title
Now showing items 55-74 of 506
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(1991)Robust large-angle spacecraft pointing and tracking by Variable Structure Control (VSC) are developed. The control of multiaxial attitude dynamics is a highly nonlinear problem, which can be resolved by exact feedback ...
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(2000)The final part of this research involves study of the global bifurcations of the two gyroscopic systems. Using recently developed bifurcation methods, we detect the presence of multi-pulse orbits homoclinic to a slow ...
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(1980)This dissertation consists of a systematic study to determine the structure of blast waves generated by a variety of non-ideal energy sources. The energy sources considered included bursting spheres, centrally initiated ...
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(1982)This dissertation presents a systematic study of the blast waves produced by axisymmetric detonation waves and constant velocity as well as accelerating deflagration waves propagating through homogeneous axisymmetric clouds ...
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(2019-01-23)Numerical modeling of gas and plasma-surface interactions is critical to understanding the complex kinetic processes that dominate the extreme environments of planetary entry and in-space propulsion. However, simulations ...
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(1993)This research investigates the dynamic response, stability and bifurcation behavior of nonlinear dynamical systems subjected to deterministic and/or stochastic excitations which includes the following systems:
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(2015-07-21)This thesis investigates the electrical conductivity of IM7 carbon fibers using two Atomic Force Microscope (AFM) –based techniques: Conductive AFM (C-AFM) and Scanning Microwave Impedance Microscopy (sMIM). Unidirectional ...
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(2020-05-14)Phase-locked stereoscopic PIV measurements were conducted to understand the interaction of inclined fluidic oscillator jets with a crossflow across a range of different blowing ratios. The fluidic oscillators used in the ...
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(2015-06-18)Transverse matrix cracks often occur in fiber-reinforced cross-ply polymer matrix composites subjected to tensile loads. Experimental visualizations of strain fields are necessary to calibrate and validate computational ...
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(2017-07-17)In this work, the tensile behavior of an additively manufactured (AM) alloy, titanium 6Al-4V, or Ti-6Al-4V (by wt. 90% titanium, 6% aluminum, 4% vanadium), is examined on multiple length scales using two-dimensional (2-D) ...
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(2007)A pulsed vacuum arc discharge emits a plasma as well as macroparticles in the form of micron-sized molten droplets of cathode material. Due to their direction of flight and submicron to 100 mum diameter, these macroparticles ...
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(2020-05-10)Closed Loop Analysis of Space Systems (CLASS) is a modular, closed-loop satellite test system developed at the Laboratory for Advanced Space Systems at Illinois (LASSI). This thesis presents the technical details of the ...
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(2001)The second dynamic fracture problem addressed in this thesis is concerned with the issue of intersonic crack propagation, a topic of great interest in the fracture mechanics and geophysics community with the recent first ...
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(2002)This research successfully develops a new numerical method for the problem of two-sided flight path optimization, that is, a method capable of finding trajectories satisfying the necessary condition of an open-loop ...
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(1986)This research compares the performance of three filters when applied to the problem of orbit determination using actual satellite data obtained from ground based radars. The states estimated are the osculating classical ...
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Compressibility effects on large-scale structures and entrainment in turbulent planar mixing layers (2020-02-17)In this work, experiments on planar free shear layers are conducted to obtain a set of benchmark computational fluid dynamics-validation data and to examine compressibility effects on shear layer turbulence. Five different ...
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(2012-05-22)Multielement airfoil configurations have shown promise in improving the aerodynamic and structural characteristics of the inboard section of megawatt-scale wind turbine blades by increasing the lift coefficients and ...
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(2011-08-25)Sonic boom minimization is a challenge faced by the aviation community to enable high- speed civilian aircraft flying supersonically over populated land. One of the concepts proposed to reduce sonic boom incorporates a ...
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Now showing items 55-74 of 506