Force Actuator And Piezoactuator Placement Study Through Svd Analysis On The Simply Supported Plate

Abstract

The piezoelectric actuator and sensor, have received lot of attention by researcher.
The reason for this, it is because these devices present the piezoelectricity effect. This effect is
the conversion between mechanical energy in electric energy and vice versa. So this effect is
very useful in active vibration control, AVC, and its results are more effective than passive
vibration control. The intelligent structures are the units’ compound by: actuator, sensor,
controller and structures (Lima Jr, 1999) and (Oliveira, 2003). Intelligent structure good
design, the actuators and sensors placement are fundamental parts, because misplacement
can cause lack of system controllability and observability. So this paper intends to propose
force and momentum piezoactuators placement technique, through index obtained from
singular value decomposition of control matrix [B]. Although the most common in AVC is
piezoactuator, we have simulated force actuator for comparative analysis. This situation is
possible, because we have used Kirchhof plate model and Melosh square element with four
nodes and three degrees of freedom every node. The structure about the study is a simply
supported plate and the results check with done simulation in finite elements.