Method for providing active damping of the vibrations generated by the washing assembly of washing machines and washing machine implementing said method

Durazzani, Piero; Valent, Lucio

doi:10.1121/1.428530

Cited by 1 publication

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“…Also, there are other patented MRF devices that are claimed to be applicable to washing machines (Hopkins et al, 2001;Carlson, 2002b,c). Durazzani and Valent (1999) developed a method for active damping of the washing machine vibration using a controllable MR fluid device. A more recent study by Choi et al (2005) discusses a conventional MR damper and its control for possible application in vibration isolation of avionic packages.…”

Section: Introductionmentioning

confidence: 99%

A Low Force Magneto-rheological (MR) Fluid Damper: Design, Fabrication and Characterization

Aydar

Evrensel

Gordaninejad

et al. 2007

Journal of Intelligent Material Systems and Structures

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This study focuses on the theoretical analysis, design, fabrication and characterization of a small Magneto-Rheological (MR) fluid damper. It can be potentially applied to a horizontal axis, front-loading washing machine. In such washing machines, although washing cycle is slow, spin cycle is much faster. During acceleration from washing cycle to spin cycle, the tub passes through its resonant speed requiring relatively high damping. On the other hand, high damping results in increased force transmission to the housing and noise at high-speed spin cycle. Controllability of the MR fluid damper allows adjustment of damping requirements for different cycles and helps to reduce the noise at high speed spin cycle while limiting the tub motion at resonance. A patented geometry of an MR valve developed by Composite and Intelligent Materials Laboratory at the University of Nevada, Reno is used as the basis of this new design to satisfy the requirements of the application. Fabricated prototype damper is characterized using harmonic displacement input. Test results are in good agreement with the theoretical predictions and design values.

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Section: Introductionmentioning

confidence: 99%