Abstract

This thesis investigates the performance of proposed modified Active Remote Dynamic Absorber (ARDA) systems. The modification is intended to improve the practicability of the previously proposed ARDA technique. The current ARDA concept utilizes an absorber system identical to the primary system (the system whose vibration is to be controlled) and two voltage amplifiers. The modification to the current ARDA system employs one amplifier only and a smaller absorber system. The mathematical model of the modified ARDA systems is developed based on a finite element approach. The developed mathematical model is programmed and solved using Maple. The program is validated by comparing the first two natural frequencies of the uncontrolled primary system (yielded by the program itself) with those engendered by the exact solution of the continuous system, the commercial finite element program ANSYS, and the experimental work.

The results of the analyses do not demonstrate a significant improvement over the current ARDA system. For the modified ARDA system to be practical, the system requires a high amplifier gain and a large absorber system. The investigation results suggest that further efforts is needed to explore the feasibility of the modified ARDA system, such as investigating the effects of different materials of the absorber beam and the use of more advanced sensors or actuators.

Library of Congress Subject Headings

Damping (Mechanics); Vibration--Control

Publication Date

2005

Document Type

Thesis

Student Type

Graduate

Degree Name

Mechanical Engineering (MS)

Department, Program, or Center

Mechanical Engineering (KGCOE)

Advisor

Hany Ghoneim

Advisor/Committee Member

Mark Kempski

Advisor/Committee Member

Kevin Kochersberger

Comments

Physical copy available from RIT's Wallace Library at TA355 .S78 2005

Campus

RIT – Main Campus

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