A Comparison of Linear Periodic and Nonlinear Control Strategies for Self-Sensing Magnetic Bearings
In this paper, the controller design for self-sensing magnetic bearings is considered using a linear time periodic (LTP) framework. The time periodicity comes from a deliberate bias ?ux excitation signal allowing to improve the plant properties. Design trade-offs using periodic controllers are investigated. Three design objectives are considered: 1) low sensitivity norm to ensure good robustness, 2) low controller gain to attenuate current measurement noise and to avoid voltage saturation, and 3) low mechanical compliance against external perturbation forces to ensure high bearing stiffness. Different LTP H∞ controllers are designed using lifting techniques and linear matrix inequalities (LMI). The resulting controllers are validated using closed-loop simulations with the nonlinear plant.
Self–Sensing Linear Time Periodic Systems (LTP) Periodic H∞ Control
Raoul Herzog Philippe Blanc
HES–SO, University of Applied Sciences Western Switzerland
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
420-428
2010-08-22（万方平台首次上网日期，不代表论文的发表时间）