A Discrete-Time Modified Sliding Mode Proximate Time-Optimal Servomechanism for Scanning-Probe-Microscope-Based Data Storage

被引：1
|
作者：
Jeong, Ji Young [2 ]
Lee, Choong Woo [2 ]
Chung, Chung Choo [1 ]
Kim, Young-Sik [3 ]
机构：
[1] Hanyang Univ, Coll Engn, Div Elect & Biomed Engn, Seoul 133791, South Korea
[2] Hanyang Univ, Coll Engn, Dept Elect Engn, Seoul 133791, South Korea
[3] LG Elect Inst Technol, Device & Mat Lab, Seoul 137724, South Korea
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 11期
关键词：
Atomic force microscopy; discrete-time systems; proximate time-optimal servomechanism (PTOS); variable structure systems;
D O I：
10.1109/TMAG.2008.2002363
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we present a discrete-time modified sliding mode proximate time-optimal servomechanism (MSMPTOS) applied to scanning probe microscope (SPM)-based data storage (SDS) systems. Three conditions on the global asymptotic stability are introduced. Time-varying sliding mode with variable convergence rate factor is used to eliminate the overshoot problem and reduce the settling time compared to the conventional sliding mode proximate time-optimal servomechanism (SMPTOS). For long track seek, its trajectory is bounded by a velocity profile that is close to time-optimal velocity profile. Its settling performance is hardly affected by seek distance whereas reducing seek time. We have obtained improved seek performance over SMPTOS for short and long seeks. Its effectiveness is verified with simulation results.
引用
收藏
页码：3750 / 3753
页数：4
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