Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43617
Title: Sliding-mode position control of medium-stroke voice coil motor based on system identification observer
Authors: Pan, J
Or, SW 
Zou, Y
Cheung, NC 
Issue Date: 2015
Publisher: Institution of Engineering and Technology
Source: IET electric power applications, 2015, v. 9, no. 9, p. 620-627 How to cite?
Journal: IET electric power applications 
Abstract: This study presents the performance improvement in the position control of a medium-stroke voice coil motor (VCM) using a sliding-mode controller (SMC) with a system identification observer (SIO). The proposed VCM is developed with a full stroke of 24 mm, and its non-linear electro-magneto-mechanical characteristics are analysed by the threedimensional finite element method. A least-squares-based SIO is introduced into the VCM control system prior to the position regulation of the SMC in order to achieve a shorter rise time of 29 ms and a smaller steady-state error of < ±2 μm under a square-wave excitation of 20 mm amplitude and 0.5 Hz frequency. An experimental verification between the SMC and a traditional proportion-integral-differential controller is carried out. The results demonstrate improved dynamic and static tracking responses in the SMC under load-free, frequency-varying operations.
URI: http://hdl.handle.net/10397/43617
ISSN: 1751-8660 (print)
1751-8679 (online)
DOI: 10.1049/iet-epa.2014.0486
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