Uncertainty Set, Design and Performance Evaluation of Centralized Controllers for AMB System
In this paper an industrially recognized modal control approach, a linear-quadratic-Gaussian (LQG) control, and an H∞ control designs are compared using automated weights tuning based on a genetic algorithm. The robust stability analysis is carried out based on the uncertainty set, which comprises parametric and nonparametric uncertainties. The uncertainty set is updated to be compliant with the measured frequency responses of the test rig. The studied combination of the uncertainties proves too conservative for the direct application in the H∞ control synthesis. However, a robust stability of the controllers synthesized using the nominal plant can be verified using μ-analysis and the very uncertainty set that cannot be used for the controller design directly. It is demonstrated that for the rigid rotor without strong gyroscopic coupling all of the control approaches result in a similar performance. For the more slender rotor with an additional disc and the dynamics dependent on the rotational speed the best results are achieved by the LQG and H∞ controllers. When no gain scheduling is applied, the modal control results in the unstable system.
Modal Control H-Infinity Control Optimal Control Finite Element Analysis
Rafal P. Jastrzebski Katja M. Hynynen Alexander Smirnov
Dept. of Electrical Engineering, LUT Energy, Lappeenranta University of Technology, PO 20, 53851 Lappeenranta, Finland
国际会议
The Twelfth International Symposium on Magnetic Bearings(第十二届国际磁悬浮轴承学术会议)
武汉
英文
72-82
2010-08-22（万方平台首次上网日期，不代表论文的发表时间）