Abstract
In recent years, the unmanned sailboats, which constantly obtain energy from the environment for propulsion, have attracted great attention from global researchers. The existing studies on unmanned sailboats mainly concentrate on navigation path planning, control system design, speed prediction and attitude optimization design, but little emphasis is put on the sail that provides the core propulsion. This study carries out orthogonal analysis and CFD simulations to analyze the influence of coupling parameters on the aerodynamic performance of arc sail, and determines an arc sail suitable for the existing Petrel unmanned sailboats. The structure and turning logic of the selected arc sail is elaborated in detail. The pool experiment with adjustable initial apparent wind angle of the sailboat is designed to verify the turning logic of the arc sail and the performance of the sailboat. Finally, an outdoor experiment is performed to validate the navigation performance of the Petrel unmanned sailboat equipped with the selected arc sail in actual sea conditions.
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