OPTIMUM ROTATION SPEED ESTIMATION DEVICE, OPTIMUM ROTATION SPEED ESTIMATION SYSTEM, AND ROTATION SPEED CONTROL DEVICE

摘要

[Problem] To accurately estimate the optimum rotation speed of a propeller. [Solution] An optimum rotation speed estimation device (9b) is provided with: a speed through water prediction unit (34) for predicting a prediction value of the speed through water necessary for a ship to arrive at a destination by a target arrival time; a wind velocity prediction value output unit (36) for outputting a prediction value of wind velocity that is expected to act on the ship at a point of interest on a navigation route; a rotation speed candidate value output unit (35) for outputting multiple rotation speed candidate values as candidates for an optimum rotation speed; a speed through water candidate value calculation part (12) which receives input of the wind velocity estimation value at the point of interest and the multiple rotation speed candidate values and outputs, as speed through water candidate values of the ship at the point of interest, values that correspond to conditions specified by combinations of the wind velocity estimation value and the rotation speed candidate values; and an optimum rotation speed estimation part (15) that estimates that the optimum rotation speed is the rotation speed candidate value that is obtained when a speed through water candidate value at which the difference between the speed through water candidate value corresponding to the rotation speed candidate value and the speed through water prediction value is the smallest is output.