Now showing items 1-10 of 481
Neural Network Enhancement of Closed-Loop Controllers for Ill-Modeled Systems with Unknown Nonlinearities
(Virginia Tech, 1997-12-02)
The nonlinearities of a nonlinear system can degrade the performance of a closed-loop system. In order to improve the performance of the closed-loop system, an adaptive technique, using a neural network, was developed. ...
Design of Adaptive Vibration Control Systems with Applicaion to Magneto-Rheological Dampers
(Virginia Tech, 1999-11-11)
The design of nonlinear adaptive control systems for reducing vibration transmission in applications such as transportation systems is discussed. The systems studied include suspension systems, such as those used in ...
Advanced modeling of active control of fan noise for ultra high bypass turbofan engines
(Virginia Tech, 1999-10-14)
An advanced model of active control of fan noise for ultra high bypass turbofan engines has been developed. This model is based on a boundary integral equation method and simulates the propagation, radiation and control ...
A Study of Smart Foam for Noise Control Applications
(Virginia Tech, 1998-10-28)
Smart foam is a composite noise control treatment that consists of a distributed piezoelectric actuator, known as polyvinylidene fluoride (PVDF), embedded within a layer of partially-reticulated polyurethane foam. The ...
Improving Signal Clarity through Interference Suppression and Emergent Signal Detection
(Virginia Tech, 2009-09-03)
Microphone arrays have seen wide usage in a variety of fields; especially in sonar, acoustic source monitoring and localization, telecommunications, and diagnostic medicine. The goal of most of these applications is to ...
The Fn method in kinetic theory
(Virginia Polytechnic Institute and State University, 1985)
Model Free Human Pose Estimation with Application to the Classification of Abnormal Human Movement and the Detection of Hidden Loads
(Virginia Tech, 2010-07-21)
The extraction and analysis of human gait characteristics using image sequences are an important area of research. Recently, the focus of this research area has turned to computer vision as an unobtrusive way to analyze ...
Linear Modeling and Analysis of Thermoacoustic Instabilities in a Gas Turbine Combustor.
(Virginia Tech, 2000-07-25)
A dynamic model is developed for the purpose of predicting stability characteristics of an industrial-scale, swirl-stabilized premixed combustor located at the National Energy Technology Laboratory (NETL) in Morgantown, ...
Biotribology: Studies of the Effects of Biochemical Environments on the Wear and Damage of Articular Cartilage
(Virginia Tech, 1999-06-28)
Tribology is the science of interacting surfaces in relative motion. It is specifically concerned with the friction, wear and lubrication of these surfaces. Although tribology has conventionally been associated with the ...
Computational Fluid Dynamic and Rotordynamic Study on the Labyrinth Seal
(Virginia Tech, 2012-06-14)
The labyrinth seal is widely used in turbo machines to reduce leakage flow. The stability of the rotor is influenced by the labyrinth seal because of the driving forces generated in the seal. The working fluid usually has ...