Dynamic characteristics and modeling of a new magnetorheological damper for broadband vibration control

Fengchen Tu; Zhaobo Chen; Hua Li; Yinghou Jiao; Bo Fang

doi:10.1117/12.780368

1 November 2007 Dynamic characteristics and modeling of a new magnetorheological damper for broadband vibration control

Fengchen Tu, Zhaobo Chen, Hua Li, Yinghou Jiao, Bo Fang

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 642362 (2007) https://doi.org/10.1117/12.780368
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

Magnetorheological (MR) dampers are smart devices characterized as high damping force, short response time and lower energy consumption. They provide a promising way for vehicle isolation. However, transmissibility of conventional MR damper increases significantly at high frequency because of stiffness hardening. For this reason, new MR damper with decoupling mechanism has been designed. The design is sensitive to amplitude and frequency of vibration, and produces stiffness and damping varied with amplitudes and frequencies vibrations. Dynamic model is derived based on Bingham model. Mathematical expressions of dynamic characteristics, including dynamic stiffness, delay angle, force transmission rate and dynamic range of damping force, are deducted by solving the models. Numerical simulations are used to study the dynamic characteristics. The results indicate that, the design produces large damping force in the low frequency high amplitude case and small damping force low stiffness in the opposite case. The high frequency stiffness hardening is avoided. This MR damper can be used to semi-active vibration control of vehicles.

Citation Download Citation

Fengchen Tu, Zhaobo Chen, Hua Li, Yinghou Jiao, and Bo Fang "Dynamic characteristics and modeling of a new magnetorheological damper for broadband vibration control", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 642362 (1 November 2007); https://doi.org/10.1117/12.780368

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