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Discrete Dynamics in Nature and Society
Volume 2015, Article ID 408623, 10 pages
http://dx.doi.org/10.1155/2015/408623
Research Article

Active Control of Nonlinear Suspension System Using Modified Adaptive Supertwisting Controller

1School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 702701, Republic of Korea
2LAMIH, CNRS UMR 8201, UVHC, 59313 Valenciennes, France

Received 26 March 2015; Revised 29 June 2015; Accepted 29 June 2015

Academic Editor: Zhan Zhou

Copyright © 2015 Jagat J. Rath et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The suspension system is faced with nonlinearities from the spring, damper, and external excitations from the road surface. The objective of any control action provided to the suspension is to improve ride comfort while ensuring road holding for the vehicle. In this work, a robust higher order sliding mode algorithm combining the merits of the modified supertwisting algorithm and the adaptive supertwisting algorithm has been proposed for the nonlinear active suspension system. The proposed controller is robust to linearly growing perturbations and bounded uncertainties. Simulations have been performed for different classes of road excitations and the results are presented.