A modified discrete-time sliding mode control for proximate time-optimal servomechanisms

Kim, Wonhee; Jeong, Ji Young; Chung, Chung Choo

doi:10.1109/ACC.2012.6315062

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A modified discrete-time sliding mode control for proximate time-optimal servomechanisms

Kim, Wonhee;
Jeong, Ji Young;
Chung, Chung Choo

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초록

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.

키워드

Discrete-time control; Proximate time-optimal; Sliding mode control; Data storage systems; Discrete time sliding mode control; Discrete-time control; Overshoot problem; Point-to-point motion; Scanning probes; Settling time; Sliding modes; Sufficient conditions; Time optimal control; Time varying; Time-optimal; Variable convergence rate; Data storage equipment; Linear systems; Servomechanisms; Sliding mode control; Synchros; Discrete time control systems

제목: A modified discrete-time sliding mode control for proximate time-optimal servomechanisms

저자: Kim, Wonhee; Jeong, Ji Young; Chung, Chung Choo

DOI: 10.1109/ACC.2012.6315062

발행일: 2012-10

유형: Conference Paper

저널명: Proceedings of the American Control Conference

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