A kind of the pulse control mode, the drive and motor closed loop, but not to the numerical control system, the feedback device, in a sense, can open loop control called the servo control.

一种采用脉冲控制方式，此种驱动器与电机闭环，但不反馈到数控系统，这种驱动器在某种程度上可称为开环控制的伺服控制。

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A pneumatic position servo system with pulse code modulation (PCM) is described in this paper.

本文研究脉冲编码调制(PCM)控制方式的气压位置伺服系统。

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A basic frame of direct current pulse width mode of servo control system is presented. Algorithm is realized by embedded digital signal processor.

提出了一种直流脉宽调制伺服控制系统的基本框架，其算法通过嵌入式数字信号处理器(DSP)来实现。

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