TY - GEN
T1 - Time optimal based DSMC with time-varying surface and its application to hard disk drives
AU - Hu, Qinglei
AU - Xie, Lihua
AU - Wang, Youyi
AU - Du, Chunling
PY - 2007
Y1 - 2007
N2 - A time optimal based discrete-time sliding mode control (DSMC) approach is developed in this paper. In this approach, a proximate time optimal switching curve is adopted for the time varying sliding mode design and a controller, consisting of an equivalent part and a discontinuous one, is designed such that the trajectory from any initial point is driven into a sliding region in the vicinity of the switching surface without chattering and thereafter remains inside it. By using the time-varying switching surface, one unified framework for both track seeking and track following control in hard disk drives (HDDs) is provided and the smooth transition from seeking control to track following control is achieved. In addition, a time-varying sliding region is also used instead of time-invariant one to eliminate the chattering and overshoot and improve the tracking performance. Simulation studies in HDDs demonstrate that the proposed control scheme provides better performance during track seeking than the commonly used discrete-time proximate time-optimal servomechanism (PTOS) and sliding mode proximate time optimal servomechanism (SMPTOS). Moreover, the unified controller achieves better disturbance rejection in track-following than the SMPTOS control.
AB - A time optimal based discrete-time sliding mode control (DSMC) approach is developed in this paper. In this approach, a proximate time optimal switching curve is adopted for the time varying sliding mode design and a controller, consisting of an equivalent part and a discontinuous one, is designed such that the trajectory from any initial point is driven into a sliding region in the vicinity of the switching surface without chattering and thereafter remains inside it. By using the time-varying switching surface, one unified framework for both track seeking and track following control in hard disk drives (HDDs) is provided and the smooth transition from seeking control to track following control is achieved. In addition, a time-varying sliding region is also used instead of time-invariant one to eliminate the chattering and overshoot and improve the tracking performance. Simulation studies in HDDs demonstrate that the proposed control scheme provides better performance during track seeking than the commonly used discrete-time proximate time-optimal servomechanism (PTOS) and sliding mode proximate time optimal servomechanism (SMPTOS). Moreover, the unified controller achieves better disturbance rejection in track-following than the SMPTOS control.
UR - https://www.scopus.com/pages/publications/41149161644
U2 - 10.1109/ISIC.2007.4450901
DO - 10.1109/ISIC.2007.4450901
M3 - 会议稿件
AN - SCOPUS:41149161644
SN - 142440441X
SN - 9781424404414
T3 - 22nd IEEE International Symposium on Intelligent Control, ISIC 2007. Part of IEEE Multi-conference on Systems and Control
SP - 296
EP - 301
BT - 22nd IEEE International Symposium on Intelligent Control, ISIC 2007. Part of IEEE Multi-conference on Systems and Control
PB - IEEE Computer Society
T2 - 2007 IEEE 22nd International Symposium on Intelligent Control, ISIC 2007
Y2 - 1 October 2007 through 3 October 2007
ER -