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6 May 1994 Adaptive vibrational control of rotating helicopter blades carrying a tip mass
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An integrated distributed actuator design methodology based upon the converse piezoelectric effect and aimed at actively controlling the in-vacuo flapping and lagging eigenvibration characteristics of rotating blades carrying a tip mass is presented. The system of piezoelectric actuators bonded or embedded into the structure produces a localized strain field in response to an applied voltage, and as a result, an adaptive change of dynamic response characteristics is generated. The helicopter blade is modeled as a thin/thick-walled closed cross- section untwisted cantilevered beam rotating with constant angular velocity. The considered numerical illustrations reveal the power of the adaptive technology to control the dynamic characteristics of rotating blade structures and, as a result, to avoid their structural resonance as well as any of their dynamic instabilities.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ohseop Song and Liviu I. Librescu "Adaptive vibrational control of rotating helicopter blades carrying a tip mass", Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994);

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