【摘要】 PID调节器在现代工业过程控制中已经大量使用。西门子公司S7-300系列PLC中的PID功能块FB41能实现连续PID调节,但是其在手/自动切换中调节器输出量会出现阶跃性扰动,不利于生产的安全可靠。针对此局限性,在PID调节器的工作机理基础上提出了一种实现无扰动手/自动切换的方法。更多还原

【Abstract】 PID controllers have been widely applied in modern industrial process control. FB41, which is the PID module in Siemens S7-300 Series PLC, can be used for continuous PID control, but its output will bring in step disturbance during manual/auto switch over. To solve this constraint, the method of bump-less manual/auto switch over based on the mechanism of PID controller is proposed.更多还原