Search

• A new vibration reduction system using a magnetostrictive (Fe-Ga alloy) bimetal actuator is presented. • A novel disturbance rejection control scheme that eliminates an unknown disturbance, without needing knowledge of its dynamics is presented. • The principle of operation of the bimetal actuation mechanism is described. • The active anti-vibration system using a magnetostrictive bimetal actuator is fabricated based on analytical and FEM results and experimentally tested in different frequencies. • The developed control system demonstrates the capability of about 33.6 % reduction in vibration amplitude of the main system (the beam vibration amplitude). This paper introduces a new vibration reduction system using a magnetostrictive (Fe-Ga alloy) bimetal actuator. The proposed method (i) uses a magnetostrictive bimetal actuator instead of prevalent single material ones that need an auxiliary temperature control system and (ii) utilises a novel disturbance rejection control scheme that eliminates an unknown disturbance, without needing knowledge of its dynamics. In experiments, the vibration source is demonstrated as an unbalanced motor attached to the tip of a cantilever beam, resembling a beam-like element subject to ambiance vibrations. In the first step, the fundamental of this anti-vibration system is introduced and described. Then, analytical and data-driven modelling for the combination of the beam, the motor, and the bimetal is reported. These follow by model validation and impulse response analysis. Then, the proposed control system is introduced in detail. Experimental results indicate that the control system results in 33.6% decrease in beam vibration amplitude. Furthermore, the presented method in this paper can be employed as a design guideline for future applications. [ABSTRACT FROM AUTHOR]