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Magneto Rheological Fluids Revolutionizing Power And Control Systems

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2007 Annual Conference & Exposition


Honolulu, Hawaii

Publication Date

June 24, 2007

Start Date

June 24, 2007

End Date

June 27, 2007



Conference Session

Hands-on Materials Science and Engineering

Tagged Division


Page Count


Page Numbers

12.1027.1 - 12.1027.10



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Paper Authors


John Marshall University of Southern Maine

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JOHN MARSHALL received his Ph.D. from Texas A&M University and is the Internship Coordinator for the University of Southern Maine’s Department of Technology. His areas of specialization include Power and Energy Processing, Electronic Control Systems, and Automation.

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NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Magneto-rheological Fluids Revolutionizing Power and Control Systems

The focus of this paper is a “hands-on” activity that was first presented at the National Educator’s Workshop. Sponsors of this workshop included the National Aeronautics & Space Administration (NASA), the National Institute of Standards and Technology (NIST), and the American Society for Engineering Education (ASEE). One of the objectives of this workshop is to provide educators with material activities that they may wish to include in their curriculums. The required format for these material activities is: Introduction; Current Applications; Method of Operation; Summary; Student Activity; Outcomes and Post-Lab Analysis; Sources of Supplies; and then the Activity Procedure.

During the Annual ASEE Conference, selected material activities are presented during a specialized technical session dedicated specifically for these workshop activities. A magneto-rheological fluid device will be available, and all participants are invited to work with this incredible material.


Magneto-rheological (MR) fluids are a form of “intelligent” material that change their flow characteristics when subjected to a magnetic field. Response, which takes only milliseconds, is in the form of a progressive gelling that is proportional to field strength. MR fluids can be produced that are capable of giving high shear stresses at low applied magnetic fields. The unique nature of this class of magnetic fluids allows dramatic changes in rheology to occur within the bulk of the fluid on application of a relatively modest magnetic field. The material can change from being fluid to solid almost instantaneously, the rheology of the material reverting to its original state upon removal of the field.

“Response, which takes only milliseconds, is in the form of a progressive gelling that is proportional to field strength. With no field present, the fluid flows as freely as hydraulic oil”.1 As a result, MR technology provides fast and infinitely variable control of energy dissipation of industrial and automotive devices.2 This change of state has the potential to revolutionize the control aspects of vibration and the responsiveness of hydraulic power transmission systems. “The application of magneto-rheological fluids for damping is a unique and novel approach to an age-old problem”. 3

Marshall, J. (2007, June), Magneto Rheological Fluids Revolutionizing Power And Control Systems Paper presented at 2007 Annual Conference & Exposition, Honolulu, Hawaii. 10.18260/1-2--1634

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