这里介绍的一种数字随动系统是引进了可逆计数器,D/A转换,数字转速计(A/D)等数字电路部件的随动系统。由于采用的数字转速计是属于增量型的光栅编码盘,因而这种系统称为增量型数字随动系统。因为纯数字电路不能输出大功率,所以系统中仍要配有可控硅等模拟部件。这样整个系统就兼备了两者的优点:数字测量技术精度高,模拟装置输出功率大, A digital servo system introduced here is a servo system that incorporates digital circuit components such as a reversible counter, a D / A converter, and a digital tachometer (A / D). Because of the digital tachometer is an incremental type grating encoder, so this system is called incremental digital servo system. Because the pure digital circuit can not output high power, so the system must still be equipped with SCR and other analog components. This whole system has both the advantages of both: high precision digital measurement technology, simulation device output power,