In general, tachometer generators are eliminated in the small and medium power DC rotating speed governing systems, and armature voltage is used as motor speed signal.
在中小型直流调速系统中，一般都取消了测速发电机，而以电枢电压作为电机转速信号。
2
For the situation of provided vibration signal but without tachometer pulses signal, a novel speed curve calculation method based on energy centrobaric IFE method is proposed.
对于没有转速脉冲信号而只有振动信号的情况下，提出了基于能量重心法ife的转速曲线计算方法。
3
If the signal comes from a tachometer, the integral gives the position.