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Mathematical Problems in Engineering
Volume 2015, Article ID 167628, 6 pages
http://dx.doi.org/10.1155/2015/167628
Research Article

Research of Control Strategy in the Large Electric Cylinder Position Servo System

School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China

Received 7 January 2015; Revised 1 March 2015; Accepted 3 March 2015

Academic Editor: Xinggang Yan

Copyright © 2015 Yongguang Liu 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

An ideal positioning response is very difficult to realize in the large electric cylinder system that is applied in missile launcher because of the presence of many nonlinear factors such as load disturbance, parameter variations, lost motion, and friction. This paper presents a piecewise control strategy based on the optimized positioning principle. The combined application of position interpolation method and modified incremental PID with dead band is proposed and applied into control system. The experimental result confirms that this combined control strategy is not only simple to be applied into high accuracy real-time control system but also significantly improves dynamic response, steady accuracy, and anti-interference performance, which has very important significance to improve the smooth control of the large electric cylinder.