Engineering Transactions, 51, 4, pp. 399–418, 2003

Dynamic Characteristics of an Experimental MR Fluid Damper

B. Sapiński
AGH – University of Science and Technology

The paper provides the results of experimental studies of dynamic characteristics of a linear MRF damper, designed especially for research purposes. Two MR fluids having different viscosity were used in the experiments. Damper design and parameters of the applied MR fluids are discussed. The relationship between the damping force and piston velocity was determined and utilised to identify the involution model of the damper. Currents in the coil were measured for voltage excitations with pulse width modulation and parameters of equivalent model of the control system were identified.
Keywords: MR fluid; MRF damper; dynamic characteristics; analytical model; control system; identification
Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).


AGRAWAL, P. KULKARNI, S.L.YIEIRA, N.G. NAGANATHAN, An overview of magneto- and electro-rheological fluids and their applications in fluid power systems, 2, 5–36, 2001.

R. BOLTER, H. JANOCHA, Design rules for MR actuators in different working modes, ŚPIE, 3045, 148–159.

S.B. CHOI, B.K. LEE, M.H. NAM, C.C. CHEONG, Vibration control of a MR seat damper for commercial vehicle, Smart Structures and Integrated Systems, Norman Werely, Editor, Proceedings of ŚPIE, 398, 5, 2000.

J.E. LINDLER, G.A. DIMOCK, N.M. WERELY, Design of a magnetorheological automotive shock absorber, Smart Structures and Materials 2000, Smart Structures and Integrated Systems, Proceedings of SPIE, 398, 5, 2000.

A. ŁAWNICZAK, A. MILECKI, Electro-rheological and magneto-rheological fluids and their application in technology [in Polishj, Wydawnictwo Politechniki Poznańskiej, 1999.

B. SAPIŃSKI, J. FILUŚ, Analysis of parametrize models of MR linear, Journal of Theoretical and Applied Mechanics, 41, 2, 215–240, 2003.

B. SAPIŃSKI, Non-parametric representations of MR linear damper behaviour, Proceedings of the IUTAM Symposium on Dynamics of Advanced Materials and Smart Structures, Yonezawa, Japan, Kluwer Academic Publishers, 347–357, 2002.

B. SAPIŃSKI, Magnetic field analysis in a magneto-rheological damper [in Polish], Sci. Papers of the AGH University of Science and Technology, Krakow (to be published).

B. SAPIŃSKI, Z. SZYDŁO, Construction and experimental investigations of a vibration damper with magneto-rheological fluid [in Polish], Problems of Machine Exploitation, l, 133, 95–106, 2003.

B. SAPIŃSKI, Z. SZYDŁO, Dash-pot damper of linear vibrations with a magneto-rheological fluid [in Polish], Invention Project Application, P-356512, 2002.

G.Y. ZHOU, P.Q. ZHANG, Investigation of the dynamic mechanical behaviour of the doubled-barreled configuration in a magnetorheological fluid damper, Smart Materials and Structures, 11, 230–239, 2002.

United States Patents, 5, 277, 281, Magnetorheological fluid dampers, 1999.

Real-time windows target user’s guide, The Math Works Inc., Natick, Massachusetts, 1999.

DOI: 10.24423/engtrans.479.2003