Abstract
The conventional hydraulic system constructed with source and actuator system has several problems such as surging, vibration or noise. Those are caused of use of hydraulic servo-valve or solenoid valve to change the direction or speed of actuator, and the steering equipment for ship has same problems.
To solve those problems and improve the performance of steering system, the author tried to adopt DDV control steering system which can operate the actuator with controlling the motor revolution directly. This system can be thought to reduce the size of system and save energy, and is going to equip on “Shioji-Maru”, the training ship in Tokyo Uniiv. of Mercantile Marine, to confirm the performance.
