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在速度伺服单元的基础上，设计位置控制ＤＤＣ系统，并介绍系统的硬件构成和控制软件，还对系统参数的选择进行了讨论。
Based on the speed servo unit, the position control DDC system is designed, the system hardware structure and control software are introduced, and the choice of system parameters is also discussed.