On Thermally Induced Vibration Control of Hybrid Magnetostrictive Beams and Plates

The outer skins of aerospace structures, which are frequently experiencing variations of temperature, are threatened by thermally induced vibration. Vibration in space has dangerous effects on the safety of structures and may result in structural failure. So, the construction of an active control system to suppress thermally induced vibrations is necessary. Active thermally induced vibration control of homogenous isotropic beams, and plates through magnetostrictive layers are presented here. Negative velocity feedback with a constant gain is employed to make appropriate strain in the magnetostrictive actuator layer. Ultimately, a closed-form solution is presented for thermally induced vibration control of the hybrid magnetostrictive-Aluminum beams and plates. Effects of material properties, thickness of magnetostrictive layers, and control gain on vibration suppression have been evaluated.