Diamagnetic bearings for MEMS: Performance and stability analysis

摘要

Diamagnetic materials could be utilized with permanent magnets to offer a rigorous passive solution for micro bearing as a result of scale reduction effect. In this paper, we investigate the basic configuration of diamagnetic bearing and evaluate the consequent magnetomechanical behaviors in terms of load-carrying capacity and the restoring in the axial, lateral and inclination directions. Based on the derived dynamic coefficients. linear vibrational characteristics and nonlinear parametric resonance of the rotor-bearing system are studied. Results obtained indicate two major instability problems for diamagnetic bearing and shed light on the design framework for its application at the microscale. (C) 2008 Elsevier Ltd. All rights reserved.