On the Design of Adaptive Active Resonant Vibration Absorber and its Vibration Damping Effect

In order to expand vibration absorber frequency bandwidth and reduce its damping,and finally to improve its vibration damping effect,the design of a novel adaptive active resonant vibration absorber is presented in this paper.Based on theoretical analysis and comparison of vibration reduction principle and dynamic characteristics of several different kinds of absorbers,and taking advantage the merits of adaptive tuned vibration absorber(ATVA)and active vibration absorber(AVA),a design of adaptive active resonant vibration absorber(AARA)was completed,and a double variable step length optimization algorithm was also put forward.Dynamic properties of proposed AARA were experimentally studied on platform vibrator and its frequency shift range and damping characteristics were theoretically analyzed.An experimental evaluation of AARA vibration damping effect was carried out on a both ends clamped beam.Experimental results demonstrate that comparing with adaptive tuned vibration absorber,the damping ratio of AARA decreases from 0.04 roughly to 0.02 due to adding active force control.Consequently,AARA vibration damping effect is significantly improved.