principal controller

The arc current and arc voltage are the input of the electrode controller which is the principal section of the electric arc furnace control system. It is the premise of assuring the normal working of electrode controller that arc current and arc voltage are measured accurately.

电弧电流和电弧电压是电弧炉控制系统最重要环节电极控制器的输入，精确测量电弧电流和电弧电压是保证电极控制器正常工作的前提。

Using the relay function of a prepositive controller, the PC can communicates with intelligent nodes through principal and subordinate semiduplex wireless network, which constitute the distributed measurement and controlling system.

通过前置机的中继功能，PC机与各个智能节点组成一个主从式半双工无线通信网络，构成集散式测控系统。

Before assuming his current posts, Kellermann was corporate controller and principal accounting officer.

就任现职之前, 凯勒曼是一名企业控制官以及主要的会计人员.

Subordinate controller parallelled with principal one is used to reduce further system's tracking error.

与主控制器并联的从控制器用来进一步减少系统的跟踪误差。

The controller and PC constitute a principal-subordinate control structure.

该运动控制器是步进电机的下位控制单元，它与PC机构成主从式控制结构，之间通过USB总线进行连接。