Dynamic modelling and response characteristics of a magnetic bearing rotor system including auxiliary bearings
Abstract
Auxiliary bearings are a critical feature of any magnetic bearing system. They protect the soft iron core of the magnetic bearing during an overload or failure. An auxiliary bearing typically consists of a rolling element bearing or bushing with a clearance gap between the rotor and the inner race of the support. The dynamics of such systems can be quite complex. It is desired to develop a rotor-dynamic model and assess the dynamic behavior of a magnetic bearing rotor system which includes the effects of auxiliary bearings. Of particular interest is the effects of introducing sideloading into such a system during failure of the magnetic bearing. A model is developed from an experimental test facility and a number of simulation studies are performed. These results are presented and discussed.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1993
- Bibcode:
- 1993STIN...9523213F
- Keywords:
-
- Dynamic Response;
- Experiment Design;
- Magnetic Bearings;
- Rotor Dynamics;
- Computerized Simulation;
- Controllers;
- Dynamic Models;
- Turbomachinery;
- Mechanical Engineering