Title: Sliding mode adaptive control for DC motors using function approximation form

Authors: Long Chen; Zhihui Zhang; Hai Wang; Ming Huang; Xingkun Xu

Addresses: School of Electronic Information, Hangzhou Dianzi University, Hangzhou, China ' School of Electronic Information, Hangzhou Dianzi University, Hangzhou, China ' School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, China ' School of Electronic Information, Hangzhou Dianzi University, Hangzhou, China ' School of Electronic Information, Hangzhou Dianzi University, Hangzhou, China

Abstract: In this paper, a novel sliding mode adaptive controller with function approximation form is proposed for the DC motor control system. For the position tracking in DC motor with unknown bounded time-varying dead zone uncertainties, the proposed controller combines sliding mode control and function approximation techniques for adaptively estimating the unknown bounded uncertainty. Specifically, control law is designed using sliding mode technique, and the function approximation technique is employed to transform the uncertain term into finite combinations of orthogonal basis function. Using the proposed control scheme, not only the superior speed tracking performance can be obtained, but also the time-varying uncertainty can be adaptively approximated online in the control design. Both the simulation and experiment results validate the excellent performance of the sliding mode adaptive controller with Laguerre basis function in terms of robustness, response speed, and anti-jamming.

Keywords: sliding mode control; SMC; adaptive control; function approximation; orthogonal basis function; robustness; DC motors; position tracking; function approximation; unknown bounded uncertainty; speed tracking; controller design; simulation; robust control; response speed; anti-jamming.

DOI: 10.1504/IJMIC.2016.080299

International Journal of Modelling, Identification and Control, 2016 Vol.26 No.3, pp.238 - 252

Received: 25 May 2015
Accepted: 15 Oct 2015

Published online: 08 Nov 2016 *

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