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2005•The Proceedings of the Dynamics & Design ConferenceOpen access

125 Nonlinear Vibration Analysis of Magnetic Bearing-Rotor System

Tsuyoshi INOUE, Yukio ISHIDA, Motoki Sugiyama

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Abstract

Because the magnetic force has nonlinear characteristic, nonlinear phenomena may occur in the rotating machinery supported by magnetic bearings. Therefore, the investigations of vibration characteristics are important for prevention of the vibration problems. In this paper, we modeled a rotating shaft system supported by magnetic bearing taking into consderation the PI control characteristics of amplifier and delay characteristic of magnetic force for the control electric current. The influences of these characteristics of control system on the vibration of rotor system are clarified.

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What this paper is about

Because the magnetic force has nonlinear characteristic, nonlinear phenomena may occur in the rotating machinery supported by magnetic bearings. Therefore, the investigations of vibration characteristics are important for prevention of the vibration problems. In this paper, we modeled a rotating shaft system supported by magnetic bearing taking into consderation the PI control characteristics of amplifier and delay characteristic of magnetic force for the control electric current. The influences of these characteristics of control system on the vibration of rotor system are clarified.

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Available abstract

Because the magnetic force has nonlinear characteristic, nonlinear phenomena may occur in the rotating machinery supported by magnetic bearings. Therefore, the investigations of vibration characteristics are important for prevention of the vibration problems. In this paper, we modeled a rotating shaft system supported by magnetic bearing taking into consderation the PI control characteristics of amplifier and delay characteristic of magnetic force for the control electric current. The influences of these characteristics of control system on the vibration of rotor system are clarified.

Key concepts: Magnetic bearing, Vibration, Nonlinear system, Rotor (electric), Control theory (sociology), Bearing (navigation), Vibration control, Physics

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