Torsional vibration control with an MR fluid brake

Shaochun Ye; Keith A. Williams

doi:10.1117/12.600174

16 May 2005 Torsional vibration control with an MR fluid brake

Shaochun Ye, Keith A. Williams

Proceedings Volume 5760, Smart Structures and Materials 2005: Damping and Isolation; (2005) https://doi.org/10.1117/12.600174
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

Analytical and experimental work has been performed on the use of a magneto-rheological (MR) fluid brake for controlling torsional vibrations in rotating systems. In this paper, two different strategies are examined for controlling the MR brake in such applications. First, implementation of the MR fluid brake as a passive friction damper with a variable friction torque is presented. In that application, fixed currents were applied to the electromagnets in the MR brake. As a result, the dominant behavior of the brake was as a dry friction damper whose friction was a function of applied current. The second approach was the implementation of the MR brake in a modified skyhook damping control approach. In that application, the friction in the MR brake was adjusted according to a comparison between the sign of absolute velocity of the primary system and the sign of the relative velocity between the MR brake and the primary system in order to add effective damping to the system. Characterization of the MR brake was an essential part of both control strategies. This work includes the results of system identification performed on the MR fluid brake, along with experimental performance results of the system under the different control strategies.

Citation Download Citation

Shaochun Ye and Keith A. Williams "Torsional vibration control with an MR fluid brake", Proc. SPIE 5760, Smart Structures and Materials 2005: Damping and Isolation, (16 May 2005); https://doi.org/10.1117/12.600174

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