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6 May 1994 Modal-based and wave-type vibration energy transmission for active control of structures
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In order to develop effective controllers for active vibration control of complex flexible structural systems, it is imperative to be thorough with vibratory transmission analysis in such systems. This paper addresses the interpretation of vibration behavior in active structures in the form of modal synthesis and waveform propagation, from which control architectures for vibration reduction are developed and specialized. Multi-input multi-output robust control methods for actively controlling vibration transmission of narrow-band disturbances, based on modal vibration characteristics in a typical beam structure bonded with piezoelectric sensors and actuators are presented. The development of compensators based on wave-propagation techniques for active control of stationary and propagating wave- forms in an active beam structure is also discussed. Vibration transmission in the structure in the form of intensity and energy density is investigated for effective vibration minimization. A LMS-based adaptive feedforward algorithm, and nonlinear feedback gain scheduling of wave parameters targeting transient and steady state vibration isolation is presented. Numerical and experimental results obtained from the implementation of the active control techniques from analysis of the modal based, and wave-type vibration transmission characteristics for an aluminum and a composite active structure is presented.
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Kwaku O. Prakah-Asante and Kevin C. Craig "Modal-based and wave-type vibration energy transmission for active control of structures", Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994);

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