Active magnetic bearings are increasingly being utilized in rotating machinery applications as an alternative to the conventional rolling-element and fluid-film bearing types. In this paper three control schemes for a large air-gap magnetic bearing system are described. In the large air-gap situation, the magnetic bearing system operates in highly nonlinear regimes .The non-linearity in this sy...

ABSTRACT: An attempt has been made to study and analyze the performance of a magnetic fluid based squeeze film in a rough porous parallel plate slider bearing. The bearing surfaces are considered to be transversely rough. The random roughness of the bearing surfaces is characterized by a stochastic random variable with non-zero mean, variance and skewness. A magnetic fluid is taken as the lubri...

An attempt has been made to study and analyze the performance of a rough hyperbolic slider bearing under the presence of a magnetic fluid lubricant. The magnetic field is oblique to the stator and the bearing surfaces are considered to be transversely rough. The roughness of the bearing surface is characterized by a stochastically random variable with non-zero mean, variance and skewness. The c...

introduction criteria for starting weight-bearing on the heel with a symptomatic calcaneal insufficiency fracture have not yet been reported. case presentation we describe a rare case of a 52-year-old woman with a calcaneal insufficiency fracture who sustained a second ipsilateral calcaneal insufficiency fracture within a short time span. the initial fracture was not evident radiographically, b...

In recent years a number of rotary machines with Active Magnetic Bearings have been designed in order to eliminate the lubricant medium, vibration and noise, and to achieve high velocities and loads. These systems are complicated due to the construction of mechanical, electrical and electronic circuits. A wide range analysis is required during the design procedure – from the construction stage ...