Allahyar Montazeri - PhD student Iran University of Science and Technology, Tehran
Saeid Shojaei - M.Sc. Student Azad University, Science and Research Branch, Tehran
Javad Poshtan - Associate Professor Iran University of Science and Technology, Tehran

In many active noise and vibration control system it is desired to reduce the vibration and also the noise emitted by flexible structure. With this objective the task of the controller is to control maximum number of modes allowed by the control system limitations. Several key parameters in the control system design for this purpose are the location, number and size of actuators and sen sors on a flexible structure. In this paper a simply-supported thin plate with laminated piezoelectric sensors and actuators is considered with the aim of reducing the vibrations and noise emitting from it. For this purpose, a performance index based on Hankel singular values of the system is selected. The resulting nonlinear optimization problem is solved using a new Particle Swarm Optimization (PSO) algorithm. The results are also verified with a state-feedback controller.

Swarm optimization, Active Vibration Control, Piezoelectric sensors and actuators, Optimal placement