Techno Press

Smart Structures and Systems   Volume 5, Number 5, September 2009, pages 517-529
Adaptive tuned dynamic vibration absorbers working with MR elastomers
X. Z. Zhang and W. H. Li

Abstract     [Full Text]
    This paper presents the development of a new Adaptive Tuned Dynamic Vibration Absorber (ATDVA) working with magnetorheological elastomers (MREs). The MRE materials were fabricated by mixing carbonyl iron particles with silicone rubber and cured under a strong magnetic field. An ATDVA prototype using MRE as an adaptable spring was designed and manufactured. The MRE ATDVA worked in a shear mode and the magnetic field was generated by a magnetic circuit and controlled through a DC power supply. The dynamic performances or the system transmissibility at various magnetic fields of the absorber were measured by using a vibration testing system. Experimental results indicated that this absorber can change its natural frequency from 35Hz to 90Hz, 150% of its basic natural frequency. A real time control logic is proposed to evaluate the control effect. The simulation results indicate that the control effect of MRE ATDVA can be improved significantly.
Key Words
    tuned dynamic vibration absorber; magnetorheological elastomers; transmissibility; vibration control efficiency.
X. Z. Zhang and W. H. Li; School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong,
NSW 2522, Australia

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