摘要
本文重新分析了磁悬浮轴承系统的数学描述,发现将被控对象的控制变量由电压改为电流时,一些具有强烈非线性的动态方程不再出现。系统的物理结构发生变化,每个通道(自由度)的阶数由以前的三阶严格降为二阶,同时被控对象的非线性得到了大幅度的改善,非线性的典型值低至2%。随后,本文给出了上述改动的物理实现方法和一个电流分配方式,这种分配方式可省去原有的偏置线圈,因此与传统的设计方案相比,它将使线圈绕组的数量减少一半。
The mathematical description of magnetic bearing system is scrutinized and it is found that some
dynamic equations with strong nonlinearity no longer when the control vatiable of the process is
shifted from voltage to current.This alteration will rigorously reduce the order from 3 to 2 for one
channel(freedom),and in the meantime,the nonlinearity will be greatly ameliorated.The typical er-
ror of nonlinearity turns out to be about 2%.Finally,the realization of the alteration is presented and
a current alloction method is put forward,which will leave out all the bias windings.Compared with
the conventional structure,the current allocation structure needs only half as many as windings of the
former.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1992年第4期25-30,共6页
Journal of Xi'an Jiaotong University
关键词
轴承
磁漂浮
降阶
非线性
bearings
magnetic levitation
models
