Abstract

An actively tuned undamped mass vibration absorber (ATVA) based on shape memory alloy (SMA) actuator is developed for attenuation of vibration in a cantilever beam. The design procedure of the ATVA is presented. The system consists of a cantilever beam mounted with shaker to generate the real-time vibration. The SMA spring with mass is attached at free end. The stiffness of SMA spring is varied dynamically in such a way to attenuate the vibration actively. Both simulation and experimentation are carried out. Simulation is carried out using Finite Element Analysis (FEA) package ANSYS software. The experiment was carried out by interfacing the experimental setup with computer along with LabVIEW software through data acquisition card (DAQ). In experimental setup, an accelerometer is used to measure the vibration which is fed to computer and in turn the SMA spring is actuated to change its stiffness which will control the vibration. The results illustrate that the developed ATVA using SMA is very effective in reducing structural response and having great potential to use as an active vibration control media.

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