Theses and Dissertations
Four quadrant dynamic model of the AUV II thruster
(Monterey, California. Naval Postgraduate School, 1993-09)
The dynamic behavior of the AUV II thruster was mathematically modeled by a four quadrant mapping of the propeller blade lift/drag coefficients as a function of fluid effective angle of attack. The model was validated with ...
An experimental study of the response of small tunnel thrusters to triangular and square wave inputs
(Monterey, California. Naval Postgraduate School, 1992-12)
The response of small tunnel thrusters to triangular and square wave changes in applied voltages to the thruster motor is studied. Previous mathematical models have attempted to identify the dynamic characteristics in ...
The influence of thermomechanical processing on the elevated temperature mechanical behavior of 6061 aluminum - alumina metal matrix composite materials
(Monterey, California: Naval Postgraduate School, 1990-12)
A cast, aluminum-based discontinuous metal matrix composite was thermomechanically processed. The material studied was 6061 aluminum containing 10 vol. pct. or 15 vol. pct. alumina (Al2O3) particles, fabricated by casting ...
Performance of small thrusters and propulsion systems
(Monterey, California: Naval Postgraduate School, 1990-03)
Performance tests of the longitudinal and lateral propulsion devices for use on the Naval Postgraduate School (NPS) Autonomous Underwater Vehicle (AUV) II are presented. The propulsion requirements for the AUV are discussed ...
Effect of surface coating on cylinders subjected to underwater shock
(Monterey, California. Naval Postgraduate School, 1992-09)
The response of a composite cylinder (metallic cylinder coated with a rubber material) subjected to an underwater explosion was analyzed numerically. Qualitative differences between coated and uncoated cylinders were ...
The influence of temperature and composition on the activation energy for creep in binary aluminum lithium alloys
(Monterey, California: Naval Postgraduate School, 1990-12)
With the fast pace of technology in the aerospace industry, there are increasing demands for higher strength and stiffness in structural materials but with reduced weight and improved formability. Aluminum alloys have been ...
The influence of a lower heated tube on nucleate pool boiling from a horizontal tube
(Monterey, California. Naval Postgraduate School, 1992-06)
Nucleate pool boiling is an essential part of the vast cooling systems today's combatant ship combat systems are dependent upon. Understanding the mechanisms that influence heat transfer in tube bundles in a liquid pool ...
Autopilot design for autonomous underwater vehicles based on sliding mode control
(Monterey, California: Naval Postgraduate School, 1990-06)
An autopilot is designed using Sliding Mode Control Theory that can control the speed and heading of a full six degree of freedom, nonlinear model that allows speed and heading to be treated as separate systems. Once control ...
Integrated system damping and isolation of a three dimensional structure
(Monterey, California. Naval Postgraduate School, 1996-03)
Controlling the vibratory response of a mechanical system is of key importance in most modern engineering designs. Constrained viscoelastic layered damping of vibrating elements is one method that can be used for vibration ...
Numerical analysis of oscillating flow about a circular cylinder
(Monterey, California. Naval Postgraduate School, 1992-06)
The numerical experiments, carried out through the use of the vorticity stream function equations and their finite difference form, on sinusoidally oscillating as well as co-existing flows (sinusoidal oscillation plus ...
Refine By:
Advisor
Author
Branch Of Service
-
Lieutenant Commander, United States Navy (36)
Date Issued
Degree
Department
-
Mechanical Engineering (36)