Magnetorheological damper

Source: Wikipedia, the free encyclopedia.

A magnetorheological damper or magnetorheological shock absorber is a

limbs.[4]

Types

Commercial applications

Many applications have been proposed using magnetorheological (MR) dampers. While vehicle applications are the most common use of MR dampers, useful medical applications have risen as well, including implants and rehabilitation methods.[6] Since MR dampers are not yet perfect, they are limited in terms of application. Disadvantages do exist when using a large scale MR damper, for example, particle settling within the carrier fluid may occur that inhibits some possible application.

History

The technology was originally developed by General Motors Delphi Automotive Division based in the USA and then developed further by BeijingWest Industries in China after BeijingWest Industries bought the technology from General Motors. BeijingWest Industries has subsequently introduced improvements including a redesigned ECU and the introduction of a dual coil system. The first car to use the technology was the 2002.5 Cadillac Seville STS, and the first sports car to use the technology was the 2003 C5 Corvette.

Automotive

These types of systems are available from OEMs for several vehicles, including the

BWI Group under the proprietary name MagneRide.[8][9]

TARDEC.[10][11]

Aviation

MRF-based dampers are excellent candidates for stability augmentation of the lead-lag (in-plane bending) mode of rotor blades in helicopters.

rotary wing industry to isolate vibrations from the aircraft structure and crew.[13]

Control

A magnetorheological damper is controlled by algorithms specifically designed for the purpose. There are plenty of alternatives, such as skyhook or groundhook algorithms.[14] The idea of the algorithms is to control the yield point shear stress of the magnetorheological fluid with electric current. When the fluid is in the presence of an applied magnetic field, the suspended metal particles align according to the field lines. Viscosity of the fluid increases according to the intensity of the magnetic field. When this occurs at the right instant, the properties of the damper change helps in attenuating an undesired shock or vibration. The relative efficacy of magnetorheological dampers to active and passive control strategies is usually comparable.[15]

See also

References

  1. ^ a b "Innovative Designs for Magneto-Rheological Dampers" (PDF). Retrieved 2013-12-08.
  2. ^ a b Primary Suspension Archived October 14, 2007, at the Wayback Machine
  3. ^ http://www.lord.com/Home/MagnetoRheologicalMRFluid/MRFluidTechnology/tabid/3318/Default.aspx MR Fluid Technology Archived October 13, 2007, at the Wayback Machine
  4. ^ Technology Compared Archived October 17, 2007, at the Wayback Machine
  5. ISSN 2229-8649
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  6. ^ Carlson, J.D.; Matthis, W.; Toscano, J.R. (March 2001). "Smart Prosthetics Based on MR Fluids". Proc. 8th Annual Symposium on Smart Structure and Material SPIE.
  7. ^ "Ready For A Track Near You: Mustang Mach-E Gt And Gt Performance Edition Ready For Customer Orders". Ford Media center. Ford.com. 26 Apr 2021. Retrieved 21 May 2021.
  8. ^ "Press Release: Audi R8 Features Delphi's Revolutionary MagneRide Semi-Active Suspension". Delphi.com. Archived from the original on 2013-11-11. Retrieved 2013-12-08.
  9. ^ "Ferrari F12 Berlinetta news and pictures new Ferrari supercar". evo. 2012-02-29. Retrieved 2012-03-05.
  10. ^ http://www.millenworks.com/html/aboutus/news/Stryker_Test.pdf MillenWorks Active Damper Suspension System Archived November 29, 2007, at the Wayback Machine
  11. ^ "A New Generation of Magneto-Rheological Fluid Dampers" (PDF). Archived (PDF) from the original on June 4, 2011. Retrieved 2013-12-08.
  12. doi:10.4050/JAHS.44.234
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  13. hdl:11572/290169
    .
  14. ^ Magnetorheological Damper Laboratory Archived 2012-04-25 at the Wayback Machine
  15. S2CID 110065009
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