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Favorable locations for piezo actuators in plates with good control effectiveness and minimal change in system dynamics

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Title Favorable locations for piezo actuators in plates with good control effectiveness and minimal change in system dynamics
 
Creator DHURI, KD
SESHU, P
 
Subject active vibration control
piezoelectric actuators
genetic algorithms
optimal placement
finite-element
frequency optimization
optimal-design
sensors
 
Description Placement and sizing of piezo actuators is normally based on control effectiveness. However, retrofitting of piezoelectric actuators alters the inherent stiffness/mass properties of the parent structure. In rotating structures, the additional mass due to piezo patches contributes to the centrifugal stiffening force. The parent structure is originally designed to have a certain natural frequency spectrum in relation to the disturbance excitation. In the event of failure of the active system, the dynamics of the structure with piezos (now rendered passive) will therefore become significant. Thus it will be helpful to determine locations for mounting piezo patches based on minimal natural frequency change yet with good control authority. In this study, a finite element based procedure for plate structures is presented. Favorable locations for mounting piezos based on minimal natural frequency changes are iteratively evolved from an initial configuration wherein the whole plate is covered with piezos. A modal controllability approach has been used for finding piezo mounting locations from a good controllability perspective. The procedure is demonstrated for simply supported square, swept-back, circular and rotating rectangular plates considering the first four modes.
 
Publisher IOP PUBLISHING LTD
 
Date 2011-08-03T18:08:26Z
2011-12-26T12:54:19Z
2011-12-27T05:42:02Z
2011-08-03T18:08:26Z
2011-12-26T12:54:19Z
2011-12-27T05:42:02Z
2007
 
Type Article
 
Identifier SMART MATERIALS & STRUCTURES, 16(6), 2526-2542
0964-1726
http://dx.doi.org/10.1088/0964-1726/16/6/057
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9109
http://hdl.handle.net/10054/9109
 
Language en