Active Control of Stay Cable Vibration Using a Giant Magnetostrictive Actuator

Abstract

Although giant magnetostrictive actuators (GMAs) have been widely studied in the field of active vibration control, the effectiveness of GMAs to control the vibration of cable structures has not been reported yet. This paper proposes an active control method of stay cable vibration using a GMA. A bilinear motion equation of a small-sag stay cable equipped with a GMA is established and the optimal active control algorithm of this control system is designed based on Lyapunov theory. A GMA is developed for the active control of a stay cable model and dynamic properties of the GMA are tested to determine the relationship between the input voltage and the output force. Numerical simulations and experimental tests for the active control of a stay cable model using the designed GMA are performed under free and forced vibration. The results indicate that the designed GMA can effectively reduce the cable vibration based on the proposed optimal active control algorithm.