谷物烘干机热风温度PID控制的优化方法

摘要

主要介绍了谷物烘干机热风温度PID控制的优化方法.不同型号的谷物烘干机结构、性能、系统模型上存在差异,因此热风温度PID控制,要采用与之对应的一套理想的PID参数来控制,热风温度PID控制器驱动风阀执行器电机,改变冷热风进风比例,使烘干的热风温度能快速、稳定的保持在设定温度附近,减少因热风温度波动大造成的不必要的损失,这对提升烘干效率及谷物品质有重大意义.%We introduces the optimization method of PID control for hot air temperature on the grain drier.For different type grain dryer,their structure,performance and system model are different,so the PID controller parameter should be optimized according to different type dryer.The hot air temperature PID controller drive the motor of air valve and change the ratio of hot air and cold air,which could keep the air temperature near the set point and minimize the unnecessary lost caused by air temperature fluctuation.This method has significant meaning for improving the drying efficiency and grain quality.