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Diplomarbeit 2004 (DA04): Arbeits-Archiv
 
DA Lks 04/2 - Magnetic bearing, digital regulation of the axial bearing
Studierende: Chris Hartsch, haertchr

Betreuer: Georgios Lekkas, lksg

At the magnetic bearing already different project and diploma theses were accomplished. The axial bearing was already implemented an finished at the beginning of this work. A radial bearing was likewise already built, however still without regulation. The data for the radial bearing, the transfer function from the current to the movement, as well as a first rough controller concept could be taken over out preceded work. The coil was again accurately measured and approximated with a untypical mathematical model. For the building of the current controller this model was reduced on first order again. The current closed loop developed in this way was measured and embedded into the outside control loop. The outside controller was dimensioned after self defined defaults. All components of the analog regulation, like the two supplies or the final controlling element were produced. The circuit was installed in a housing such a way that at any time optional other controllers can be attached externally. Following, the same two controllers were constructed on xPC target and the regulation was let run with them.

The state control with observer was realized on all in all four different variants. First an observer was realized over the whole system, thus without inclusion of the current measurement. An observer of the second subsystem only was built afterwards. In each case either all conditions from the estimation were taken over or only straight that, which cannot be measured for physical reasons. It turned out that the observer, who was built only over the subsystem, has the fundamental better qualities.

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