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Browse Dept. of Aerospace Engineering by Title
Now showing items 311-330 of 506
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Neighboring Optimal Feedback Control for Trajectories Found by Collocation and Nonlinear Programming (1997)On August 9, 1995, because of a launch vehicle failure the Koreasat 1 satellite was placed into an orbit that was 3,400 nautical miles (6,351 km) lower than the planned geostationary transfer orbit. The Lockheed-Martin ...
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(1982)In Part one of this thesis, I calculate the transport coefficients of degenerate neutrinos in dense matter taking into account both absorption and scattering of neutrinos by nucleons. Exact solutions of the transport ...
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(2014-01-16)The topic of the first part of this research is trajectory optimization of dynamical systems via computational swarm intelligence. Particle swarm optimization is a nature-inspired heuristic search method that relies on a ...
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(2011-08-25)New methods to solve trajectory optimization problems are devised. The methods use direct transcription to convert the continuous optimal control problem into a parameter optimization problem that can be solved with ...
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(2015-04-20)Modern spacecraft trajectory mission planning regularly involves some component of numerical optimization to provide a significant improvement in a solution, and in some instances is the only manner for finding an acceptable ...
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(2016-09-02)This thesis presents a mathematical framework for precision attitude control of a spacecraft using the inertial coupling between the spacecraft and solar arrays. The spacecraft with solar arrays is modeled as a one degree ...
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(2015-07-20)This thesis is presented in two parts. In the first part, a fully nonlinear controller is developed for controlling the position and attitude of the Crazyflie quadrotor. In order to use this controller, a system identification ...
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Nonlinear Dynamic Analysis of Flat Plate Layered Bodies Accounting for Large Transverse Deflections (1977)
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(2009)Our result is applied to the electric power system whose daily operations must be guarded against failures due to natural disasters, rogue attacks and other unexpected conditions. One of the central challenges in current ...
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(1989)For purposes of achieving high performances of tracking, and precision pointing of a flexible structure subject to large angular maneuvers (such as the slewing maneuver of a large space structure), a newly developed off-line ...
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(2014-05-30)The University of Illinois is developing a CubeSat bus, known as IlliniSat-2, which will be capable of achieving 3-axis attitude control via magnetic torque coils and attitude determination via Kalman-filtered magnetometer ...
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(2012-02-06)The application of vortex generators (VGs) for shock/boundary layer interaction flow control in a novel external compression, axisymmetric, low-boom concept inlet was studied using numerical and experimental methods. The ...
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(2014-09-16)The ghost cell immersed boundary method coupled with a finite difference based Navier-Stokes solver has been developed. The flow solver is used to analyze the two-dimensional, unsteady and viscous flow at low Reynolds ...
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(1988)Vortex aerodynamics has played an important role in the development of high performance aircraft in recent years. Although computer codes which solve the three dimensional Euler equations have been used extensively to study ...
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(2004)To accurately simulate particles in wall-bounded flows with the CRW model, a modified Markov chain based on a normalized velocity fluctuation was found to be important to avoid unphysical wall-ward particle fluxes. Also, ...
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(2014-01-16)This thesis aims to interpret the first temperature measurements recorded by the research group in terms of heat release from pressurizations of specific nanoparticles of alloys by Hydrogen. The number of unknowns was an ...
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(2004)A numerical study was conducted to understand the effects of simulated ridge and leading-edge ice shapes on the aerodynamic performance of airfoils and wings. In the first part of this study, a range of Reynolds numbers ...
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(1983)An implicit noniterative finite difference method in conservative form has been used to solve numerically the Euler and the Navier-Stokes equations for the compressible flow over a triconic body. The numerical solutions ...
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(1984)This thesis is a systematic development of a general numerical method for the solution of the nonlinear ship wave problem. Analytical approaches to this problem must always be linearized and are often unable to handle ...
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Now showing items 311-330 of 506