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本发明是关于船用电动液压舵机,特别关于这样的舵机,它能按照给定航向的偏航角自动控制,或在诸如机动操纵或进坞对,手动调整船的舵位。本发明更着重谈到的是能根据误差信号的大小,自动以多于一种速度调整舵位的电动液压舵机装置。例如在航向稳定时,舵令较小,舵就低速动作。但如进港机动操纵和
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to marine electro-hydraulic steering gears, and more particularly to such steering gears that can be automatically controlled at a yaw angle for a given heading or manually adjust the rudder position of a ship such as a maneuvering or docking pair. More specifically, the present invention is directed to an electro-hydraulic steering gear device that is capable of automatically adjusting the steering position at more than one speed based on the magnitude of the error signal. For example, when the heading is stable, the rudder order is small and the rudder moves at low speed. However, such as maneuvering into the port