Vibration Reduction for Offshore Platforms via Delayed Sliding Mode H∞ Control

• Published in: International journal of control, automation, and systems Vol. 17; no. 1; pp. 107 - 116
• Main Authors: Zhang, Bao-Lin, Jiang, Xiefu, Wu, Qiuxuan, Tang, Gong-You
• Format: Journal Article
• Language: English
• Published: Bucheon / Seoul Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers 01.01.2019; Springer Nature B.V; 제어·로봇·시스템학회
• Subjects: Amplitudes; Automation; Control; Control systems design; Control theory; Delay; Design; Engineering; H-infinity control; Mechatronics; Offshore drilling rigs; Offshore platforms; Regular Papers; Robotics; Science; Sliding mode control; Vibration control; Wave forces; 제어계측공학; offshore structure; control; time-delay; sliding mode control; Delayed feedback
• ISSN: 1598-6446; 2005-4092
• DOI: 10.1007/s12555-018-0110-1

This paper deals with delayed sliding mode H ∞ control for an offshore steel jacket platform subject to nonlinear self-excited wave force and external disturbance. By using both current and delayed states, a delayed sliding mode H ∞ controller is designed to attenuate vibration of the offshore platform. It is observed through simulation results that the delayed sliding mode H ∞ controller is capable of reducing the oscillation amplitudes of the offshore platform significantly. Moreover, compared with the delay-free sliding mode H ∞ controller, the oscillation amplitudes of the offshore platform under the controllers are almost the same, while the control force required by the delayed sliding mode H ∞ controller is less than that by the delay-free sliding mode H ∞ controller.