Abstract
This study deals with the utilization of piezoelectric actuators in controlling the structural vibrations of flexible beams. A Modified Independent Modal Space Control (MIMSC) method is presented to select the optimal location, control gains and excitation voltage of the piezoelectric actuators. The method minimizes the vibration amplitudes of beams to which these actuators are bonded, as well as the input control effort necessary to suppress these vibrations. The method presented accounts for the effects that the piezoelectric actuators and the bonding layers have on the elastic and inertial properties of the composite flexible beams. Numerical examples are presented to illustrate the MIMSC method and to demonstrate the effects that the physical and geometrical properties of the bonding layer have on the dynamic performance of the actively controlled beams. The results obtained emphasize the importance of the method in designing more realistic active control systems for flexible beams, in particular, and large flexible structures in general.
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