Performance Enhancement for AMB Systems Using Unstable H∞ Controllers

被引：59

作者：

Balini, H. M. N. K. ^{[1
]}

Scherer, Carsten W. ^{[2
]}

Witte, Jasper ^{[3
]}

机构：

[1] Delft Univ Technol, Delft Ctr Syst & Control, NL-2600 AA Delft, Netherlands

[2] Univ Stuttgart, Dept Math, D-70049 Stuttgart, Germany

[3] ASML, NL-5504 DR Veldhoven, Netherlands

来源：

IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY | 2011年 / 19卷 / 06期

关键词：

Active magnetic bearings (AMB); disturbance rejection; H-infinity synthesis; mass imbalance; robust control; unstable controller; Youla parameterization; STATE-SPACE FORMULAS; SUBSPACE IDENTIFICATION; MAGNETIC-BEARING; DESIGN;

D O I：

10.1109/TCST.2010.2097264

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Controllers synthesized using H-infinity methods provide good disturbance attenuation for active magnetic bearing spindles. The synthesized controllers are often unstable when the spindle exhibits flexible dynamics. In this paper, we design and implement controllers using different models for an experimental active magnetic bearing (AMB) system. For an AMB model that contains flexible dynamics, the synthesized H-infinity controllers promise higher performance but are found to be unstable. To implement an unstable controller, we use a Youla parametrization-based method and seamlessly switch from a stable to an unstable controller. The improved benefits of the unstable controllers for disturbance attenuation are demonstrated using experimental measurements.

引用

页码：1479 / 1492

页数：14