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Discrete Dynamics in Nature and Society
Volume 2016 (2016), Article ID 2402794, 9 pages
http://dx.doi.org/10.1155/2016/2402794
Research Article

Discrete Sliding Mode Control for Hypersonic Cruise Missile

College of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China

Received 24 December 2015; Revised 18 February 2016; Accepted 7 March 2016

Academic Editor: Driss Boutat

Copyright © 2016 Yong Hua Fan 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

A discrete variable structure control (DVSC) with sliding vector is presented to track the velocity and acceleration command for a hypersonic cruise missile. In the design an integrator is augmented to ensure the tracking with zero steady-state errors. Furthermore the sliding surface of acceleration is designed using the error of acceleration and acceleration rate to avoid the singularity of control matrix. A proper power rate reaching law is utilized in this proposal; therefore the state trajectory from any initial point can be driven into the sliding surface. Besides, in order to validate the robustness of controller, the unmolded dynamic and parameter disturbance of the missile are considered. Through simulation the proposed controller demonstrates good performance in tracking velocity and acceleration command.