在以往的研究过程中，主要发现电液伺服控制单元在零位时存在振动，左右行程不对称，精度和快速性达不到使用要求的问题。
In the previous studies, Central oscillation, asymmetry of left and right movement and insufficient precise and speed of response are the main problems of electro-hydraulic servo control unit.
电液控制单元是船用舵机电液位置伺服系统关键部件，其性能的优劣直接影响舵机的性能。
Electrohydraulic control unit whose performance has direct effect on rudder's characteristics is the key component of ship rudder position control system.
机械臂的系统控制硬件主要包括伺服电机系统﹑控制单元﹑运动控制单元﹑上层管理单元。
The control system of the manipulator consists of servo motor control unit, motion control unit and top management unit.
伺服系统由多个子系统组成，如位置控制器、速度控制单元、位置反馈装置等。
One servo system consists of several subsystems such as position control, velocity control and feedback of position.
同时采用交流伺服电机作为驱动元件，基于MPC02运动控制卡作为上位控制单元构建了开放式控制系统。
In the meantime, by using an AC servo motor as the driving parts and based on the MPC02 motion control card, the open control system was formed.
同时采用交流伺服电机作为驱动元件，基于MPC02运动控制卡作为上位控制单元构建了开放式控制系统。
In the meantime, by using an AC servo motor as the driving parts and based on the MPC02 motion control card, the open control system was formed.
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