The introduction to this text utilizes the control systems of a five - storeyed lift where the programmable controller is written, running situation of the inspection lift PLC control system.

本文介绍了利用可编程控制器编写的一个五层电梯的控制系统，检验电梯PLC控制系统的运行情况。

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Vibrational control is referred to the effect of changing the properties of dynamic systems caused by introduction of high_frequency vibrations with zero mean value.

振荡控制是指通过引入零均值的高频振荡信号来改善系统动态特性的方法。

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This article has carried on the detailed introduction on coordinate systems of the numerical control lathe and common methods to definite the position of cutting tools.

并对数控车床的坐标系和常用的对刀方法进行详细的介绍。

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