Synthesis of electric networks interconnecting PZT actuators to efficiently damp mechanical vibrations

The aim of this thesis is to show that it is possible to damp mechanical vibrations in a given frame, constituted by Euler beam governed by the equations of an elastica, by means of piezoelectric actuators glued on every beam and interconnected each other via electrical networks.Since we believe that the most efficient way to damp mechanical vibrations by means of electrical networks, is to realize a strong modal coupling between the electrical and the mechanical motion, we will synthesize a distributed circuit analog to the Euler beam.We will approach this synthesis problem following the black box approach to mechanical systems, studied by many engineers and scientists during the 1940's in an attempt to design analog computers.It will be shown that it is possible to obtain a quick energy exchange between its mechanical and electrical forms, using available piezoelectric actuators.Finally we will study a numerical simulation for the damping of transverse vibrations of a beam clamped at both ends.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Engineering Science and Mechanics

Department dc:contributor.department

Engineering Science and Mechanics

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2000

Author dc:creator

• Porfiri, Maurizio

Chair dc:contributor.committeechair

• Henneke, Edmund G. II

Committee members dc:contributor.committeemember

• Mook, Dean T.
• dell'Isola, Francesco
• Morris, Don H.
• Batra, Romesh C.

• Distributed control
• Vibration control
• Black box approach
• Piezoelectric actuators
• Electrical analogs
• Passive networks

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-12302000-113904

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/36485