A new variable stiffness absorber based on magneto-rheological elastomer
(1. State Key Laboratory of Mechanic Transmission, Chongqing University, Chongqing 400044, China;
2. College of Opto-Electronic Engineering, Key Lab of Opto-Electronic Technology and System of Education Ministry, Chongqing University, Chongqing 400044, China)
2. College of Opto-Electronic Engineering, Key Lab of Opto-Electronic Technology and System of Education Ministry, Chongqing University, Chongqing 400044, China)
Abstract: A new adaptive variable stiffness absorber was proposed based on a smart material, magnetorheological elastomer (MRE), and its vibration control performance was investigated. Before developing the proposed absorber, the MREs were firstly fabricated by curing a mixture of 704 silicon rubber, carbonyl iron particles and a small amount of silicone oil under an external magnetic field. Then the mechanical properties of the fabricated MREs were measured. On the basis of the measured mechanical characteristics, the MRE absorber was developed and its working characteristics were also tested under various input currents and excited frequencies. Finally, the control responses of a two-degree-of-freedom dynamic system with a MRE absorber were presented under a chirp input and used to evaluate the effectiveness of the MRE absorber.
Key words: magneto-rheological elastomer; variable stiffness; absorber