Anisotropic Stiffness Effect for Improving Stability of Two-Axes Controlled Rotor by Magnetic Bearings

This paper describes a stability analysis of anisotropic bearing stiffness effect for improving damping characteristics of a two-axes controlled rotor by magnetic bearings. The method of averaging is applied for simplifying the mathematical model of tilting motion of the rotor. The anisotropic stiffness effect is found to be efficient for improving the damping characteristics but it depends on the ratio of moments of inertia of the rotor.