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Now showing items 1-10 of 13
Stored waveform adaptive motor control
(Virginia Tech, 1986-03-05)
This study investigates an adaptive control scheme designed to maintain accurate motor speed control in spite of high-frequency periodic variations in load torque, load inertia, and motor parameters. The
controller adapts, ...
Position control and vibration suppression of a flexible beam-like structure cantilevered from a rotary actuator within a gravitational field
(Virginia Polytechnic Institute and State University, 1986)
An analytical and experimental investigation into the position and vibration control of beam-like structures within a gravity field using only root actuation was performed. Two methods were used to linearize the system's ...
Interactive 3-D computer-aided design of external spur gears cut by a hob
(Virginia Polytechnic Institute and State University, 1986)
An interactive program is presented which enhances the design of external spur gears cut by a hob. The program code calculates the geometry of an involute spur gear with trochoidal fillets and then uses the Graphical Kernel ...
Computer-aided design of axial-flow fans
(Virginia Polytechnic Institute and State University, 1986)
This thesis examines the application of computer-aided design techniques to the field of turbomachinery. Specifically, the process of designing low- to medium-speed, axial-flow fans and blowers is discussed, and a Fortran ...
Automatic geometric modeling of spatial mechanism links
(Virginia Polytechnic Institute and State University, 1986)
This thesis introduces GENMOD, a collection of subroutines which allow automatic geometric modeling of 3-D models for spatial links or linkages given a minimum amount of information as input. The subroutines utilize the ...
Development of a geometric model for the study of propagating stall inception based on flow visualization in a linear cascade
(Virginia Polytechnic Institute and State University, 1986)
Flow visualization movies of flow through a cascade of compressor blades showed propagating stall at stagger angles of 36.5 and 45 degrees for angles of attack of 20 degrees and higher. At a stagger angle of 25 degrees, ...
The use of thin polymeric coatings to prevent fretting corrosion and metallic contact in steel-on-steel systems
(Virginia Polytechnic Institute and State University, 1986)
A fundamental study was conducted to investigate the ability of thin polymeric coatings to prevent metallic contact and fretting corrosion in steel-on-steel systems. Ten polymer types were chosen for study: polymethylmethacrylate ...
Tip leakage flow in a linear turbine cascade
(Virginia Polytechnic Institute and State University, 1986)
Laminar flow with an axially varying heat transfer coefficient
(Virginia Polytechnic Institute and State University, 1986)
Design and implementation of an advanced user interface for three- dimensional conceptual design on CAD/CAM systems
(Virginia Polytechnic Institute and State University, 1986)