Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
805224 | Precision Engineering | 2011 | 4 Pages |
Abstract
In this study, we designed an augmented robust controller for an ultra-precision positioning system. The control algorithm includes modified sliding-mode control with a new switching surface and linear quadratic (LQ) control for optimal feedback gain. A nanometric scale positioning system is especially vulnerable to parameter uncertainties and external disturbances. To solve this problem, we propose an augmented system that adopts two auxiliary states: state estimates and control input. We demonstrated the robust performance of the proposed control algorithm through a comparison with LQ control.
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
W.R. Lee, J.H. Lee, K.H. You,