Active Magnetic Bearings as Actuators and Sensors in Journal Bearing Measurements

摘要：

The present paper shows the successful usage of active magnetic bearings (AMBs) to identify the dynamic characteristics of journal bearings in the frequency domain. A test rig is operated using two AMBs supporting a rigid rotor with a centric journal bearing. An identification procedure for the stiffness and damping coefficients of journal bearings is presented. This procedure incorporates the successful application of AMBs for positioning, supporting, sensing and actuating the rotor simultaneously. For identification the real excitation force is needed. Two methods to derive a force-current-position relationship are outlined and compared: an idealized mathematical relation and a measured force-current-position map. Finally, results for applying the pre-measured map and an example of the identified stiffness and damping coefficients are given.

关键词： Active Magnetic Bearings Actuator Sensor Application Identification of Dynamic Properties

作者: Katrin Baumann Fadi Dohnal Richard Markert

作者单位: Institute of Structural Dynamics, Department of Mechanical Engineering, Technische Universit(a)t Darmstadt, Petersenstraβe 30, 64287 Darmstadt, Germany

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: 650-657

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）