Abstract The surface tension of the liquid Ti-V system is systematically measured using oscillating drop technique during electromagnetic levitation. Temperature- and compositional dependence are both investigated. entire range covered. A linear decrease with increasing temperature found for pure elements as well all investigated alloys. generally increases V-content. obtained data in good agre...

Magnetic levitation, which uses a magnetic field to suspend objects in a fluid, is a powerful and versatile technology. We develop a compact magnetic levitation platform compatible with a smart-phone to separate micro-objects and estimate the density of the sample based on its levitation height. A 3D printed attachment is mechanically installed over the existing camera unit of a smart-phone. Mi...

A rotor supported on active magnetic bearings (AMBs) is levitated inside an air gap by electromagnets controlled in feedback. In the event of momentary loss of levitation due to an acute exogenous disturbance or external fault, reestablishing levitation may be prevented by unbalanced forces, contact forces, and the rotor’s dynamics. A novel robust control strategy is proposed for ensuring levit...

Interdigitated microelectrodes have been used to investigate the passive dielectrophoretic levitation of latex beads as a function of the frequency and voltage of the applied electrical signal, the suspending medium conductivity, bead size and characteristic dimensions of the electrodes. The variations of the electric field strength E and of the factor ∇E 2 as functions of the height above the ...

Swissmetro is a MAGLEV Project between the main cities of Switzerland, designed for a speed up to 500 [km/h] in two tunnels under partial vacuum. Two propulsion variants are considered: the short stators of the linear homopolar motors are fixed with the tunnel tracks; the stator of the motors is on board of the vehicles. The levitation, the guidance and the transfer of energy are independent. T...

A simple approach to describe the levitation force measurements on melt-processed HTS bulks was developed. A couple of methods to determine the critical current density Jc were introduced. The averaged ab-plane Jc values for the field parallel to this plane were determined. The first and second levitation force hysteresis loops calculated with these Jc values coincide remarkably well with the e...

This paper presents the design of feedback linearization and neural network based feedback linearization (NARMAL2) controller for a magnetic levitation system. The magnetic levitation system is one of the classical nonlinear systems. The paper provides simulation results to validate the theoretical design.