基于分段PID控制的高温泵水温控制系统  

Segmented PID Control Based Temperature Control System of High Temperature Pump

作　　者：朱景红 王汝才 ZHU Jing-hong;WANG Ru-cai(Shandong Academy of Agricultural Machinery Sciences,Jinan 250100,China)

机构地区：[1]山东省农业机械科学研究院,山东济南250100

出　　处：《机械工程与自动化》2018年第6期181-182,共2页Mechanical Engineering & Automation

摘　　要：高温泵试验用水温度控制系统以S7-300PLC为核心控制模块,调用FB41功能块进行PID运算,然后由PLC调用脉冲宽度调制器FB43将连续变化的模拟量转化为开关量进而控制加热装置。采用分段PID控制,将实际温度值和设定值的偏差分为几个阶段,不同阶段采用不同的PID参数,解决了加热过程中温度超调、波动幅度大以及加热时间长等问题。该方案已应用到实际企业横向课题中,经验证控制精度高、稳定性好。The high-temperature pump test water temperature control system uses the S7-300 PLC as the core control module,and the PID operation calls the FB41 function block.Then the PLC calls the pulse width modulator FB43 to convert the continuously changing analog quantity into the switch quantity to control the heating device.Using segmented PID control,dividing the actual temperature value and set value deviation into several stages,adopting different PID parameters in different stages,this method solves temperature overshoot,large fluctuation range and long heating time in the heating process.The control scheme has been applied to the actual business subject,and the control accuracy is high and the stability is good.

关 键 词：高温泵 温度控制 分段PID控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]