It is digital servo timing control system which is driven by PWM, direct current moment motor.
采用了脉冲调宽功放装置(PWM)，直流力矩马达直接驱动转台框架的数字伺服调速体制。
One important research aspect has come into being which is robot integral joint design driven directly by AC servo system.
由交流伺服系统直接驱动的机器人关节一体化设计已成为一个重要研究方向。
Compass card is individually driven by a transistorized servo system and Pointers driven by synchros.
罗盘刻度盘单独由装有晶体管的伺服系统驱动，指针由自整角机驱动。
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