Title :
Ferrous Floatation [Ask the experts]
Author_Institution :
Dept. of Mech. & Aerosp. Eng., Univ. of Virginia, Charlottesville, VA
fDate :
6/1/2008 12:00:00 AM
Abstract :
In this issue of IEEE Control Systems Magazine, we invite Carl Knospe to respond to a query on magnetic levitation. He answers the question ´In my control systems textbook, one of the examples of feedback control is a magnetically levitated ball. An electromagnet above the ball is used to control its position. I have also seen a lab experiment of this kind advertised for sale. Is this just a neat toy or could it be used in a practical application? Why is a control system necessary? Couldn´t levitation be achieved with only permanent magnets, which would use less power? Finally, are electromagnetic systems hard to control?´
Keywords :
electric variables control; feedback; magnetic levitation; magnetic variables control; control system; electromagnetic systems; feedback control; ferrous floatation; magnetic levitation; magnetically levitated ball; Coils; Control systems; Electromagnetic forces; Electromagnets; Force control; Force sensors; Magnetic levitation; Motion control; Open loop systems; System testing;
Journal_Title :
Control Systems, IEEE
DOI :
10.1109/MCS.2008.920951
