4.7 Article

Automatic dock-to-dock control system for surface vessels using bumpless transfer

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OCEAN ENGINEERING
卷 268, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.113425

关键词

Automatic control; Bumpless transfer; Guidance; Unmanned surface vessels

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This paper proposes and demonstrates an automatic steering system for passenger ferries with dock-to-dock capabilities. The method utilizes a modular control architecture and bumpless transfer transition strategies to allow different controllers for different vessel operational phases. A state machine divides ferry operations into undocking, transit, and docking phases. Simulation results show successful implementation of the method in ferry navigation between docks.
This paper proposes and demonstrates an automatic steering system designed for passenger ferries with dock -to-dock capabilities. The method consists of a modular control architecture and bumpless transfer transition strategies that enable the implementation of different independent controllers for different vessel operational phases. The method is expressed as a state machine and divides the ferry operations into three different phases, undocking, transit, and docking. The proposed modular architecture allows the use of well-proven vessel control methods such as dynamic positioning for navigating within the marine harbor environment, and a speed -and course controller for transit between the different docks. Bumpless transfer is achieved by resetting the integrator of the receiving controller, to avoid discontinuities in the control action. Specifically, the output of two controllers are constrained to be equal at the time of transition, and the integrator state value required by the receiving controller is solved. The proposed method has been demonstrated in several simulations, taking the vessel from one dock to another in a satisfactory manner.

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