Models of electro - hydraulic servo valve , gear - rack swing hydraulic - pressure oil vat , double shanks hydraulic - pressure oil vat , placement sensor and torque sensor are selected in order to analog the rolling moment and swaying force more accurately . transfer functions of electro - hydraulic moment servo system and placement servo system are presented and the system parameters are gained 为了能更好的模拟海浪作用于船舶的横摇力矩和横荡力，选取了电液伺服阀、齿轮齿条摆动液压油缸、双出杆油缸、位移传感器和扭矩传感器的型号，建立了电液力矩伺服系统和位置伺服系统的传递函数模型，求取了系统参数，并对系统进行了仿真研究。
In the design , gear and spline were adopted , so symmetrical movement of ( collimator ’ s ) lead gates can be achieved easily , mechanical structure became more compact . worm was adopted to adjust mirrors accurately , and deflection of mirrors can be prevented in case of the external impacts or vibrations 采用齿轮齿条结构,实现铅门的对称开合运动,使子系统的机械结构更为紧凑,同时提高了定位精度;采用蜗轮蜗杆调解反光镜的角度,可以使反光镜的调节更精确,同时可以防止在外界振动或撞击下反光镜发生偏转。
