Optimization of location and tuning of a state-switched absorber for controlling beam vibration

Mark Holdhusen; Kenneth A. Cunefare

doi:10.1117/12.484014

1 August 2003 Optimization of location and tuning of the state-switched absorber for controlling beam vibration

Mark Holdhusen, Kenneth A. Cunefare

Proceedings Volume 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control; (2003) https://doi.org/10.1117/12.484014
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

This paper considers the optimization of the performance of a state-switched absorber (SSA) in controlling the vibration of a continuous beam. A state-switched absorber has the capability to instantaneously change its stiffness, which allows the absorber to 'retune' to a new natural frequency instantaneously. Between each 'retuning', or switch event, the SSA is essentially a passive device, tuned to the resonance frequency of its current state. With proper switching logic, the SSA shows improved performance in vibration control as compared to classical passive devices when the excitation contains more than one frequency component. The SSA considered here is capable of switching between only two discrete stiffnesses. A direct search algorithm is employed for optimization of the absorber's location along the beam as well as the two tuning frequencies needed to achieve the best performance of the state-switched absorber. Several two-frequency component point excitations are considered at a few locations along the beam and over a range of frequencies. The optimized performance of the state-switched absorber is compared to the optimized performance of a classical tuned vibration absorber (TVA) for each forcing case.

Citation Download Citation

Mark Holdhusen and Kenneth A. Cunefare "Optimization of location and tuning of the state-switched absorber for controlling beam vibration", Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); https://doi.org/10.1117/12.484014

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