Title :
Active vibration control of a simply supported beam using a spatially distributed actuator
Author :
Burke, Shawn E. ; Hubbard, James E., Jr.
Author_Institution :
Charles Stark Draper Laboratory, Inc., Cambridge, MA, USA
fDate :
8/1/1987 12:00:00 AM
Abstract :
The application of a spatially shaped distributed actuator for the vibration control of a simply supported beam is studied both analytically and experimentally. The actuator consists of a layer of polyvinylidene fluoride (PVF2) bonded to one face of the beam. A summary of the underlying theory is presented, with emphasis on how controllability requirements affect the choice of the film´s spatial distribution. The requisite film controller has a linearly varying spatial distribution that facilitates the control of both even- and odd-order vibrational modes. Experimental results are presented for the control of the beam´s first three modes, using both the linearly varying as well as a uniform spatial distribution. The linearly varying distribution is shown to be effective in controlling both even- and odd-order modes, serving to increase the modal loss factors by up to a factor of 4.5. In addition, the experimental results are found to corroborate a simplified computer model of the controller.
Keywords :
Adaptive control; Mechanical variables transducers; Plastic materials/devices; Actuators; Bonding; Control systems; Current control; Damping; Distributed control; Polymers; Structural beams; Vibration control; Vibration measurement;
Journal_Title :
Control Systems Magazine, IEEE
DOI :
10.1109/MCS.1987.1105349