A Novel MRF-Based Torque Servo Device


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In mechanical equipments or manufacturing processes, force control is definitely required to achieve desired performance or to ensure product quality. Aiming at this issue, this paper introduced an author-invented torque servo device that utilizes magnetorheological fluids (MRF) to provide a controllable torque. In the paper, the structure and working principle of the MRF-based torque servo device (MRT) were introduced, the constitutive model and the characteristics of the MRF were established and discussed. On the basis, the static and dynamic models of the MRT were both analytically and experimentally studied, and the control of the output torque of the MRT was demonstrated. As an example, the application of the MRT to the polishing of aspheric surfaces was presented in the end.



Edited by:

Di Zheng, Yiqiang Wang, Yi-Min Deng, Aibing Yu and Weihua Li




D. Zheng et al., "A Novel MRF-Based Torque Servo Device", Applied Mechanics and Materials, Vols. 101-102, pp. 158-163, 2012

Online since:

September 2011




[1] H. T Pu, and F.J. Jiang: Chemical Industy and Engineering Progress, Vol. 24 (2005) No. 2, pp.132-136 (In Chinese).

[2] F. Lu: Study on Magnetorheological Fluid Torque Servo Applied in Compliant Polishing of Aspheric Parts (M. Sc., Ningbo University of Technology, China 2010) (In Chinese).

[3] J.H. Li: Reasearch and Application of MR Fluide and Dampers (Ph.D., Haerbin Institute of Technology, China 2006), pp.25-37 (In Chinese).

[4] F.W. Preston: Journal of The Society of Glass Technology, Vol. 11 (1927), pp.214-256.

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