The investigation, development and fabrication of a magnetic levitated linear motion system, based on Switched Reluctance (SR) principle for high-acceleration and high-precision position control applications, are addressed in this paper. The proposed system is very suitable for applications that require highperformance linear motions: from high-precision manufacturing machines, clean-room wafer...

Abstract: In this paper, we present the design and simulation of a new fuzzy logic supervisory control approach that is designed to improve the performance of a PID controlled magnetic levitation system, such systems are inherently unstable and require means of control to stabilize their operation; the fuzzy logic controller continuously monitors system variables (error signal, and its derivati...

When Faraday identified/named diamagnetism (relative permeability μ < 1) in 1845, he reported in Arts. 2253-2260 of [1] that a glass rod would align itself at right angles to the lines of magnetic field of his laboratory electromagnet. He also noted in Art. 2269 that such object moved “into the positions of weakest magnetic action.” Faraday’s test objects were suspended from a string, but W. Th...

The stability of the Levitron cannot be explained if the top’s axis has a fixed direction in space. Stability against flipping is not enough. Gyroscopic precession around the local magnetic field direction is necessary. An analysis and numerical integration of the equations of motion for an experimental stemless top that includes gyroscopic precession around the local magnetic field lines predi...

This paper deals with the present scenario of magnetic levitation with LIM. The magnetically levitated train has no wheels, but floats-or surfs-on an electromagnetic wave, enabling rides at 330 miles per hour. By employing no wheels, maglev eliminates the friction, and concomitant heat, associated with conventional wheel-on-rail train configurations. There are two basic types of non-contact Mag...

In this work a novel method is introduced for the estimation of the position of a self-sensing magnetic levitation system, based on a least squares identification strategy. In the first step, a detailed mathematical model of the magnetic levitation system is derived and the properties of this system are analyzed for the case of a pulse-width modulated control. Based on this model, an estimation...

-Elimination of frictional losses has been receiving large attention to reduce power consumption and the maintenance cost thus increasing the power efficiency. Considering the above facts, Magnetic levitation technology has given the contribution in industry as a part. Now, since Maglev's are highly nonlinear and inherently unstable, the objective is to design a controller that would be an attr...

Diamagnetic levitation is a technique that uses a strong, spatially varying magnetic field to reproduce aspects of weightlessness, on the Earth. We used a superconducting magnet to levitate growing bacterial cultures for up to 18 h, to determine the effect of diamagnetic levitation on all phases of the bacterial growth cycle. We find that diamagnetic levitation increases the rate of population ...

Over the centuries object suspension has stunned and interested most of the people including famous scientists such as Benjamin Franklin and Robert Goddard. In 1842 Ernshaw came up with the idea of the suspension of an object in the magnetic field created by permanent magnets. He also proved that permanent magnets cannot reach a stable levitation in all 6DOF [5] which requires new methods to be...

An algorithm for the estimation of the electric resistance for self-sensing magnetic levitation systems is presented. The development of this novel estimation algorithm is based on the position estimator proposed in Glück et al. (2010). Based on the mathematical model of the considered magnetic levitation system, the main ideas of the position estimation algorithm are summarized. A detailed ana...