MODELLING AND ANALYSIS OF ACTIVE VIBRATION CONTROL OF NAVAL STRUCTURAL COMPONENTS

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Authors
  1. Koko, T.S.
  2. Orisamolu, I.R.
  3. Smith, M.J.
  4. Akpan, U.O.
Corporate Authors
MARTEC Ltd, Halifax NS (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Control of structural behaviour is often required in many naval applications. Examples include vibration control of ship machinery and noise suppression in hsip and submarine structures. In the marine community, control is traditionally achieved by the use of passive controllers, such as externally attached absorbers or damping materials, which store or dissipate the energy of vibration. However, although passive control is desirable, it is insufficient in itself in preventing excessive vibration or the propagation of disturbances to remote regions of the structure. On the other hand active control techniques, which involve the use of sensors, actuators and control laws, are suitable when the disturbances to be suppressed excite a number of vibration modes or are of an uncertain or evolving character. This study is concerned with the modelling and analysis of active vibration control of beams and plate structures. The sensors and actuators are made of piezoelectric materials which are bonded on to the surface of the structures. When subjected to mechanical strain the piezoelectric sensors produce an electric potential, which is first amplified using a suitable control law, and then applied to the actuators. The applied actuator electric potential is converted to a mechanical force which is used to control the structure. TRUNCATED
Report Number
DREA-SR-97-002-PAP-36 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
1
DSTKIM No
98-01022
CANDIS No
507239
Format(s):
Hardcopy;Document Image stored on Optical Disk

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