The paper introduces how to design the PLC non - contact control system in rebuilding electrical system of crane, on the basis of a practical example.

结合实际情况对以PLC为内核的全数字直流调速器电能驱动，进行了起重机的工作机构和电器系统改造实现电器系统无触点控制。

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The design of the pantograph's active control system and the study of the simulation results reduce the fluctuation of the contact force theoretically and thus improve the current collecting quality.

通过受电弓主动控制系统的设计和对其的仿真研究，理论上降低了弓网系统接触压力的波动，从而改善了受流质量。

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When fitting each contour line, the points measured by non - contact measuring system are as the top points about control polygon for forming EE spline curve.

在拟合每个轮廓线时，先用非接触测量系统测出的数据反算出ee样条曲线控制多边形的顶点。

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Facebook is also planning to get rid of a setting for users to control who can contact them on its email system.

BBC: Privacy groups call for Facebook changes U-turn

Its no-contact drive system uses an advanced low-noise motor and geared belt to ensure control over speed while filtering out vibration.

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