roll-off frequency

The simple and common mode of obtaining line speed is chosen to calculate the diameter of the roll in the rolling-up process, the running frequency of analogue output signal of the driving converter controlling the speed of the system is used as the line speed signal namely.

收卷过程中卷径计算选用最简单、最常用的线速度获取方式，即用控制系统速度的驱动级的变频器（艾默生TD3000）运行频率模拟输出信号作为线速度信号。

Study on Fault Vibration Frequency Spectrums of the Felt Stretcher Roll in a Modern Wide Paper Machine

宽幅纸机毛毯张紧辊特征故障振动频谱研究

The control system of industrial computer control inverter and frequency conversion variable speed motors through polymerizing-kettle control inverter control, and it can collect real-time test data of big motor output torque, pick spike roller or skinning and roll speed feeding speed.

工控机分别控制两个变频器以实现大、小电动机调速，并实时采集大电动机输出扭矩、摘穗辊或剥皮辊转速以及植株喂入速度等试验数据。

The frequency of roll and pitch are acquired by tachome-ter of B. K. company and LDC-825 counter.

俯仰频率和滚转速度被LDC -825 计数器和B · K公司转速计记录.

This aircraft also has the frequency conversion function, causes to roll rubs the rotation to adjust willfully according to the craft.

④本机还具有变频功能，使滚揉转数根据工艺任意调整。