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Cooperative Control of Multiple Dynamic Positioning Vessels with Input Saturation Based on Finite-time Disturbance Observer

  • Guoqing Xia
  • Chuang SunEmail author
  • Bo Zhao
  • Jingjing Xue
Regular Papers Control Theory and Applications
  • 23 Downloads

Abstract

This paper presents a new cooperative control strategy for dynamic positioning of multiple surface vessels subject to unknown time-varying environmental disturbances and input saturation. The vessels are assumed interconnected through a directed topology rather than bidirectional. Two control objectives are considered in this paper. The first one is to make these vessels track desired positions and headings, and the other control objective is to hold the desired formation. For these purposes, we propose a cooperative control which consists of finite-time disturbance observer, auxiliary dynamic system and dynamic surface control technique. A nonlinear finite-time observer is developed to estimate unknown time-varying disturbance. To tackle the input saturation problem, an auxiliary dynamic system is constructed. It is also proved that all signals in the closed-loop control system converge to a small neighborhood of equilibrium state via Lyapunov analysis. Simulation results are given to validate the effectiveness of the proposed control strategy.

Keywords

Auxiliary system cooperative control disturbance observer dynamic positioning input saturation surface vessels 

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Copyright information

© Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guoqing Xia
    • 1
  • Chuang Sun
    • 1
    Email author
  • Bo Zhao
    • 1
  • Jingjing Xue
    • 1
  1. 1.College of AutomationHarbin Engineering UniversityHarbinChina

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