Vibration isolation of unbalanced machinery using an adaptive-passive magnetoelastic suspension

The problem of unbalanced machinery isolation is tackled in this paper. The proposed method incorporates a magnetoelastic suspension which can be adapted depending on the rotational frequency and is built with two main parts: a magnetoelastic rod and a magnetizing solenoid. The properties of the system make it possible to use one configuration of the suspension (demagnetized state of the rod) over a bandwidth range and another configuration (saturated state of the rod) over the remaining bandwidth range. In addition, three different magnetoelastic materials were tested and the results show significant improvements with respect to completely passive configurations. A theoretical model is also explored in order to make comparisons with the experimental results.