Abstract

Recently, electric ship is being actively conducted in marine industry. Benefits are reduction of environmental impact and improved maneuverability and controllability. A ship that specializes in motility attention to control of the motor has been attracting attention. It is a 4-axis electric propulsion ship with four motors to the driving force. 4-axis electric propulsion ship tracks the magnitude of the direction and magnitude of thrust of the hull utilizing the control of the motor speed. This paper proposes a thrust estimation method that focuses on the axis placement of 4-axis electric propulsion ship. This paper evaluates thrust control using the estimation method by thrust measurement. Results of experiments suggest that the proposed method works properly and effectively.

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