Abstract: In this study, the problem of controlling flexural waves transmitted through a cylindrical strut is addressed. This cylindrical strut is representative of a helicopter gearbox strut, which is attached at one end to the gearbox and at the other end to the fuselage. The primary disturbance is assumed to be transmitted from the end attached to the gearbox. Secondary forces are generated by a set of carefully positioned piezoelectric actuators, and feedforward and feedback schemes are used to determine the appropriate current inputs into these actuators. In one case, the control inputs to the actuators are chosen based on a performance function that includes the power supplied by the actuators to the strut. The abilities of the considered active control schemes to effectively attenuate the flexural displacements at the fuselage attachment end are examined and discussed. Future considerations for this work are also presented.!13
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