The application of Programmable Logic Controller(PLC) and frequency converter in small radar antenna servo positioning system were demonstrated in the paper. The purpose of radar antenna servo positioning, technical essential, composition of system, equipment selection, hardware circuit and the design of configuration software were also illustrated.% 文章介绍了PLC、变频器在小型雷达天线伺服定位系统中的应用。阐明了雷达天线伺服定位的目的、技术要点、系统构成、设备选型、硬件电路以及组态软件的设计等。
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