Abstract
Problems related to mathematical modeling and dynamic behavior of pretwisted adaptive rotating blades are considered. The blade is modeled as a thin-wall, single-cell beam encompassing nonclassical effects such as anisotropy, transverse shear, and warping restraint. The adaptive capabilities provided by a system of piezoactuators bonded or embedded into the structure are also implemented in the system. Based on the converse piezoelectric effect and of out-of-phase activation, boundary control moments are piezoelectrically induced at the beam tip. Two feedback control laws relating the induced bending moments with the appropriately selected kinematical response quantities are used, and the beneficial effects of the implementation of the active feedback control, considered in conjunction with that of the structural tailoring on the eigenvibration characteristics, are highlighted.
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