Experimental Analysis of Frequency Response Function Estimation Methods for Active Magnetic Bearing Rotor System

摘要：

System identification can be used in automated retuning of an active magnetic bearing (AMB) rotor system during commissioning. In the case of good signal-to-noise ratio (SNR), the identification measurements are more time effective using multisine excitation than stepped sine excitation. A multisine signal contains selected frequencies in the desired frequency range. Since in multisine excitation the signal distributes the power over F frequencies, the SNR of the measurement deteriorates. The SNR is improved by averaging the measured frequency response function (FRF) over several measurements. The purpose of this study is to investigate the suitability of different frequency response function estimators for an AMB rotor system identification. The results show that the most accurate estimator for this setup with non-synchronous measurements and the excitation used, is a joint-input-output estimator.

关键词： System Identification Frequency Response Functions Closed-Loop Identification

作者: Hynynen KatjaM Jastrzebski Rafal P Smirnov Alexander

作者单位: Lappeenranta University of Technology, 53851 Lappeenranta, Finland

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Magnetic Bearings(第十二届国际磁悬浮轴承学术会议)

会议地点: 武汉

会议语种:英文

页码: 760-766

在线出版日期: 2010-08-22（万方平台首次上网日期，不代表论文的发表时间）