针对开环变频调速系统精度不高的特点,提出了一种基于MicroLogix1500 控制器调速系统的模糊控制方法。本论文利用MicroLogix1500 PLC 中的查表方法实现参数查询功能,使得控制算法简单明了。结果表明:该系统具有较高的稳定性、控制精度和品质。 关键词: 模糊控制 PLC MicroLogix1500 Abstract: The open loop frequency conversion timing system has the character of low precision. A fuzzy control arithmetic is put forward based on MicroLogix1500. The paper realize the function of inquire by the method of using the cursor to address the form in MicroLogix1500.That makes control arithmetic brief. The practical results show that this system has better stability, accuracy and quality of control. Key words:Fuzzy Controller;PLC;MicroLogix1500