A modified discrete-time sliding mode control for proximate time-optimal servomechanisms
- Authors
- Kim, Wonhee; Jeong, Ji Young; Chung, Chung Choo
- Issue Date
- Oct-2012
- Publisher
- IEEE
- Keywords
- Discrete-time control; Proximate time-optimal; Sliding mode control
- Citation
- Proceedings of the American Control Conference, pp.4588 - 4593
- Indexed
- SCOPUS
- Journal Title
- Proceedings of the American Control Conference
- Start Page
- 4588
- End Page
- 4593
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164510
- DOI
- 10.1109/ACC.2012.6315062
- ISSN
- 0743-1619
- Abstract
- In this paper, a modified discrete-time sliding mode control for proximate time-optimal servomechanisms is proposed in order to improve the performance of point-to-point motion in a 2nd-order damped linear system. The proposed method consists of a proximate time-optimal control, a time varying sliding mode control, and a variable convergence rate factor in discrete-time. Three sufficient conditions are also proposed to ensure the stability of the suggested scheme. The variable convergence rate factor is implemented in the discrete-time sliding mode control in order to eliminate the overshoot problem and reduce the settling time. The proposed controller was applied to a scanning probe microscope-based data storage system so as to compare its performance to that of a proximate time-optimal servomechanism and a sliding mode proximate time-optimal servomechanism.
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