介紹了PLC 應用于某艦艇減搖鰭系統數字化改造。建立了以PLC 為核心的數字控制
系統，在不增加任何輸入信號的情況下，實現原有控制系統的各項功能。此數字控制系統與以數字閥為核心的數字液壓隨動系統結合，簡化了減搖鰭系統結構，提高了系統可靠性。改造后的數字化減搖鰭系統已在某型艦艇上成功投入使用。
關鍵詞：減搖鰭；PLC；數字閥

Abstract：Applications of PLC in digital renovation of fin stabilizer are introduced. The
PLC-based digital control system is set up, realizing all the functions of previous control system without adding any more input signals. The renovated fin stabilizer system include the PLC-based digital control system and digital valve based the digital hydraulic servo system, which helps to simplify the structure and to uprate reliability of the fin stabilizer system. The developed digital fin stabilizer system has been applied in certain naval ship successfully.
Keywords：fin stabilizer; PLC; digital valve