Optimum vibration control of flexible beams by piezo-electric actuatorsThe utilization of piezoelectric actuators in controlling the structural vibrations of flexible beams is examined. A Modified Independent Modal Space Control (MIMSC) method is devised to enable the selection of the optimal location, control gains and excitation voltage of the piezoelectric actuators in a way that would minimize the amplitudes of vibrations of beams to which these actuators are bonded, as well as the input control energy necessary to suppress these vibrations. The developed method accounts for the effects that the piezoelectric actuators have on changing the elastic and inertial properties of the flexible beams. Numerical examples are presented to illustrate the application of the developed MIMSC method in minimizing the structural vibrations of beams of different materials when subjected to different loading and end conditions using ceramic or polymeric piezoelectric actuators. The obtained results emphasize the importance of the devised method in designing more realistic active control systems for flexible beams, in particular, and large flexible structures in general.
Document ID
19890024295
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Baz, A. (Catholic Univ. of America Washington, DC, United States)
Poh, S. (Catholic University of America, Washington, DC, United States)
Studer, P. (NASA Goddard Space Flight Center Greenbelt, MD, United States)