磁気軸受で支えられたロータの基礎励振力応答 : 周波数サンプリングフィルタを用いた加速度フィードフォワード制御

概要

論文の詳細を見る
Because of its low stiffness compared with ball bearings, a magnetic bearing-rotor system is easily affected adversely by foundation movement such as seismic vibration. Although built-in touchdown bearings function in an emergency, it is necessary to restrain a foundation-excited response of a rotor within the designed gap. In this paper, an acceleration feedforward control method is presented to reduce the relative response of a rotor to stator magnets caused by foundation movement. While a high proportional gain in PID control intended to increase bearing stiffness may cause instability, this method can reduce the dynamic compliance of the magnetic bearing-rotor system without altering its stability. Applying this acceleration feedforward control to an experimental apparatus, the relative response of a rotor to stator magnets caused by foundation movement is restrained to about half of the response with ordinary PID control.
一般社団法人日本機械学会の論文
1996-02-25