基于PLC模糊自适应PID门座式起重机变频调速系统的设计与实现

Design and Implementation of Portal Crane Frequency Control System Based on PLC Fuzzy Adaptive PID

摘要:

为了进一步提高门座式起重机控制系统的平稳性和可靠性,在研究传统的起重机控制系统的基础上,设计了基于PLC模糊自适应PID的起重机变频调速系统,利用先进的模糊自适应PID算法与PLC控制技术相结合实现智能变频控制。系统直接由PLC实现函数运算取代常规的查表方式,改善调速性能,实现了变频调速系统的快速控制；同时,通过PLC对起重机变频器进行无触点控制,有效提高了的准确可靠性。仿真结果表明:加入模糊自适应PID控制的起重机变频调速系统比传统系统响应速度快,超调量低于3%,更加平稳可靠；同时降低了起重机功耗,节能近20%,并有效延长了电动机的使用寿命。

Abstract:

In order to further improve the stability and reliability of the gantry crane control system,in advance of the research of traditional crane control system,designed a crane frequency control system which based on PLC fuzzy adaptive PID,combined advanced fuzzy adaptive PID algorithms with PLC control technology to realize intelligent frequency control. The system implemented function operation directly by PLC to replace the conventional look-up table,to improve speed performance,and achieve rapid control of Frequency Control System. At the same time,through the PLC to execute crane non-contact control,improve the accuracy and reliability effectively. Experimental and simulation results show that:adding fuzzy adaptive PID to crane frequency control system is more stable and reliable than traditional frequency control system,its response is fast,and the overshoot is less than 3%.And it can reduce power almost 20% and prolong the crane motor life.