Vibration control of beam with magnetic rotating unbalance

Abstract

Vibration has been one of the important areas of concern while designing structure due to rotating unbalance. However, vibration control is still an active issue and reducing the vibration due to rotating unbalance is a challenging task. Here an innovating balancing process is proposed which greatly give the damping to the beam which is having rotating magnetic unbalance. In the present experimental study, magnetic rotating unbalance is mounted on a cantilever beam resulting in beam deflection due to rotating unbalance of the beam. Also, the beam deflection causes the fixed end of cantilever beam to induce more force which in turn causes more stresses. For the controlling of vibration, another rotating magnetic unbalance is mounted at the opposite side of first unbalance. Based on the equal and opposite force cancellation and magnetic properties of magnet, the experimental study is done in which data is collected with accelerometer and force transducer. For the first mode shape amplitude of beam and force transmitted to the fixed end are reduced satisfactory. With this approach without any controller the amplitude of vibration is reduced up to 96.60% and force transmitted to the fix end reduced up to 75%. © 2020 Author(s).