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Investigation Into Modeling And Control Methods To Optimize The Power Output Of Wind Turbines, Robert Liebschutz
Investigation Into Modeling And Control Methods To Optimize The Power Output Of Wind Turbines, Robert Liebschutz
All Theses and Dissertations (ETDs)
Wind turbine power output is a function of not only wind speed but many other constraints such as attitude with respect to the wind and blade pitch settings. Optimizing power output with respect to these parameters is accomplished by optimizing the rotary system's power coefficient. A primary objective of this research is to optimize the power coefficient in a design space that includes collective and cyclic pitch in the presence of axial or yawed wind inflow. The model developed to perform this analysis uses blade element theory and a nonlinear version of the Pitt Peters dynamic inflow model. The model …
Propulsion By Sinusoidal Locomotion: A Motion Inspired By Caenorhabditis Elegans, Xialing Ulrich
Propulsion By Sinusoidal Locomotion: A Motion Inspired By Caenorhabditis Elegans, Xialing Ulrich
All Theses and Dissertations (ETDs)
Sinusoidal locomotion is commonly seen in snakes, fish, nematodes, or even the wings of some birds and insects. This doctoral thesis presents the study of sinusoidal locomotion of the nematode C. elegansin experiments and the application of the state-space airloads theory to the theoretical forces of sinusoidal motion. An original MATLAB program has been developed to analyze the video records of C. elegans' movement in different fluids, including Newtonian and non-Newtonian fluids. The experimental and numerical studies of swimming C. elegans has revealed three conclusions. First, though the amplitude and wavelength are varying with time, the motion of swimming C. …