This paper presents the design, fabrication and
evaluation of magneto-rheological damper. Semi-active control
devices have received significant attention in recent years because
they offer the adaptability of active control devices without requiring
the associated large power sources. Magneto-Rheological (MR)
dampers are semi- active control devices that use MR fluids to
produce controllable dampers. They potentially offer highly reliable
operation and can be viewed as fail-safe in that they become passive
dampers if the control hardware malfunction. The advantage of MR
dampers over conventional dampers are that they are simple in
construction, compromise between high frequency isolation and
natural frequency isolation, they offer semi-active control, use very
little power, have very quick response, has few moving parts, have a
relax tolerances and direct interfacing with electronics. Magneto-
Rheological (MR) fluids are Controllable fluids belonging to the
class of active materials that have the unique ability to change
dynamic yield stress when acted upon by an electric or magnetic
field, while maintaining viscosity relatively constant. This property
can be utilized in MR damper where the damping force is changed by
changing the rheological properties of the fluid magnetically. MR
fluids have a dynamic yield stress over Electro-Rheological fluids
(ER) and a broader operational temperature range. The objective of
this papert was to study the application of an MR damper to vibration
control, design the vibration damper using MR fluids, test and
evaluate its performance. In this paper the Rheology and the theory
behind MR fluids and their use on vibration control were studied.
Then a MR vibration damper suitable for vehicle suspension was
designed and fabricated using the MR fluid. The MR damper was
tested using a dynamic test rig and the results were obtained in the
form of force vs velocity and the force vs displacement plots. The
results were encouraging and greatly inspire further research on the
topic.
[1] Ahmadian, M., (1999) "Design and development of magnetorheological
dampers for bicycle suspensions", American Society of
Mechanical Engineers, Dynamic Systems & Control Division
Publication, DSC, Vol. 67, pp.737-741
[2] Ahmadian. M., J. C. Poynor, J. M. Gooch, (1999) "Application of
magneto-rheological dampers for controlling shock loading", American
Society of Mechanical Engineers, Dynamic Systems & Control Division
(Publication) DSC-, Vol.67, pp. 731-735.
[3] Carlson D,(2001) D. M. Catanzarite and K. A. St. Clair, "Commercial
magneto-rheological fluid devices", Lord Corporation.
[4] Carlson, J. D., W. Matthis, and J. R. Toscano., "Smart prosthetics based
on magneto-rheological fluids", SPIE 8 th Annual Symposium on Smart
Structures
[5] "Designing with MR fluids", (1999) Lord Corporation Engineering note,
Thomas Lord Research Center, Cary, NC.
[6] Dyke.S.J., B.F. Spencer Jr., M.K. Sain, and J.D. Carlson, (1996)
"Seismic response reduction using magneto-rheological dampers",
Proceedings of the IFAC World Congress; San Francisco, CA
[7] Poyner, C. James (2001), "Innovative designs for magneto-rheological
dampers", MS Thesis, Advanced Vehicle Dynamics Lab, Virginia
Polytechnic Institute and State University, Blacksburg, VA.
[8] Seval. G, (2002) "Synthesis and properties of magneto rheological (MR)
fluids", PhD. Thesis, University of Pittsburgh.
[9] Spencer. B. F Jr., S. J. Dyke, M. K. Sain and J. D. Carlson, (1996)
"Phenomenological model of a magneto-rheological damper", ASCE
Journal of Engineering Mechanics, pp.1-23
[10] "Vibration and Seat Design", (2001) Lord Corporation white paper,
Thomas Lord Research Center, Cary, NC.
[1] Ahmadian, M., (1999) "Design and development of magnetorheological
dampers for bicycle suspensions", American Society of
Mechanical Engineers, Dynamic Systems & Control Division
Publication, DSC, Vol. 67, pp.737-741
[2] Ahmadian. M., J. C. Poynor, J. M. Gooch, (1999) "Application of
magneto-rheological dampers for controlling shock loading", American
Society of Mechanical Engineers, Dynamic Systems & Control Division
(Publication) DSC-, Vol.67, pp. 731-735.
[3] Carlson D,(2001) D. M. Catanzarite and K. A. St. Clair, "Commercial
magneto-rheological fluid devices", Lord Corporation.
[4] Carlson, J. D., W. Matthis, and J. R. Toscano., "Smart prosthetics based
on magneto-rheological fluids", SPIE 8 th Annual Symposium on Smart
Structures
[5] "Designing with MR fluids", (1999) Lord Corporation Engineering note,
Thomas Lord Research Center, Cary, NC.
[6] Dyke.S.J., B.F. Spencer Jr., M.K. Sain, and J.D. Carlson, (1996)
"Seismic response reduction using magneto-rheological dampers",
Proceedings of the IFAC World Congress; San Francisco, CA
[7] Poyner, C. James (2001), "Innovative designs for magneto-rheological
dampers", MS Thesis, Advanced Vehicle Dynamics Lab, Virginia
Polytechnic Institute and State University, Blacksburg, VA.
[8] Seval. G, (2002) "Synthesis and properties of magneto rheological (MR)
fluids", PhD. Thesis, University of Pittsburgh.
[9] Spencer. B. F Jr., S. J. Dyke, M. K. Sain and J. D. Carlson, (1996)
"Phenomenological model of a magneto-rheological damper", ASCE
Journal of Engineering Mechanics, pp.1-23
[10] "Vibration and Seat Design", (2001) Lord Corporation white paper,
Thomas Lord Research Center, Cary, NC.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:59284", author = "A. Ashfak and A. Saheed and K. K. Abdul Rasheed and J. Abdul Jaleel", title = "Design, Fabrication and Evaluation of MR Damper", abstract = "This paper presents the design, fabrication and
evaluation of magneto-rheological damper. Semi-active control
devices have received significant attention in recent years because
they offer the adaptability of active control devices without requiring
the associated large power sources. Magneto-Rheological (MR)
dampers are semi- active control devices that use MR fluids to
produce controllable dampers. They potentially offer highly reliable
operation and can be viewed as fail-safe in that they become passive
dampers if the control hardware malfunction. The advantage of MR
dampers over conventional dampers are that they are simple in
construction, compromise between high frequency isolation and
natural frequency isolation, they offer semi-active control, use very
little power, have very quick response, has few moving parts, have a
relax tolerances and direct interfacing with electronics. Magneto-
Rheological (MR) fluids are Controllable fluids belonging to the
class of active materials that have the unique ability to change
dynamic yield stress when acted upon by an electric or magnetic
field, while maintaining viscosity relatively constant. This property
can be utilized in MR damper where the damping force is changed by
changing the rheological properties of the fluid magnetically. MR
fluids have a dynamic yield stress over Electro-Rheological fluids
(ER) and a broader operational temperature range. The objective of
this papert was to study the application of an MR damper to vibration
control, design the vibration damper using MR fluids, test and
evaluate its performance. In this paper the Rheology and the theory
behind MR fluids and their use on vibration control were studied.
Then a MR vibration damper suitable for vehicle suspension was
designed and fabricated using the MR fluid. The MR damper was
tested using a dynamic test rig and the results were obtained in the
form of force vs velocity and the force vs displacement plots. The
results were encouraging and greatly inspire further research on the
topic.", keywords = "Magneto-rheological Fluid, MR Damper, Semiactive
controller, Electro-rheological fluid.", volume = "3", number = "5", pages = "568-6", }