Modeling and Sensorless H.INF. Control of Magnetic Bearing with Effect of Eddy Current.
Modeling and Sensorless H.INF. Control of Magnetic Bearing with Effect of Eddy Current.
复制标题
建模和无传感器 H.INF.
DOI：
10.1299/kikaic.65.4012
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Nonami
中科院分区：
文献类型：
--
作者：
Y. Ariga;K. Nonami
无传感器控制是一种不使用机械系统控制中常用的位移传感器或加速度传感器而实现运动或振动控制的方法。将无传感器控制应用于机械系统的优点是降低成本，通过配置防止控制系统的不稳定性，减小设备的尺寸和重量。本文研究了磁悬浮轴承系统的无位置传感器控制。无传感器磁轴承控制已经通过使用观测器来实现，该观测器使用电磁铁中的测量电流来估计系统的状态。然而，由于涡流损耗的建模非常复杂并且尚未阐明，因此对于具有涡流损耗的磁轴承系统使用观测器来实现磁轴承系统的无传感器控制是困难的。为此，采用基于最小二乘法的曲线拟合方法辨识出了考虑涡流影响的磁轴承模型，并基于H∞控制理论设计了输出反馈型无位置传感器控制系统。实验表明，本文提出的控制策略是实现无传感器控制的一种有效途径。
Sensorless control is a method to realize the motion or vibration control without using displacement sensors or acceleration sensors which are generally used in the control of mechanical systems. The advantages of applying sensorless control to mechanical systems are cost reduction, prevention of instability of the control system by collocation, downsizing and lightening of the apparatus. In this study, a sensorless control to magnetic bearing system was investigated. Sensorless magnetic bearing control has been already realized by using an observer which is estimating the state of the system using the measured current in the electromagnet. However it is difficult to realize a sensorless control of magnetic bearing system using an observer for such a system with eddy current loss because the modeling of an eddy current loss is so complicated and has not been clarified yet. So, a model of magnetic bearing with the effect of eddy current was identified by curve fit based on least square method, and an output feedback type sensorless control system was designed based on H∞ control theory. It is clarified through the experiment that the proposed control strategy in this paper is a very useful approach to realize a sensorless control.