This document discusses active vibration control using magnetostrictive transducers. It first defines magnetostriction as a property of ferromagnetic materials where their shape or dimensions change with magnetization. Magnetostrictive materials can convert between magnetic and kinetic energy and are used to build actuators and sensors. An active vibration control system uses a magnetostrictive transducer as an actuator along with an accelerometer and control system to apply counter forces that reduce structural vibrations. Magnetostrictive transducers consist of a magnetostrictive rod within a coil that is preloaded with poles and mass/springs. Active vibration control has advantages like high sensitivity and accuracy in reducing vibrations in applications like manufacturing machinery. F