模糊自适应PID控制在谷物冷却机中的应用

目前使用的谷物冷却机控制系统大部分还采用的是基于PLC控制器的传统PID控制方式,由于传统PID控制自身特性,使系统控制精度和反应速度都不够理想。为此本文将模糊自适应PID控制引入到谷物冷却机控制系统中,以实现谷物冷却机出风温度和设定温度始终保持一致。通过仿真,模糊自适应PID控制将模糊控制与PID控制的优势相结合,使得控制系统具有较好的动态品质和调节精度。所以,对于谷物冷却机出风温度这种大时滞、非线性的控制对象,采用模糊自适应PID控制能够取得较好的控制效果。

Fuzzy Adaptive PID Control in the Grain Chiller Application

The most of control system of grain chiller which is currently used adopt PID controller based on PLC,because of the traditional PID control their own characteristics,the system control precision and response speed are less than ideal.This article introduces the fuzzy adaptive PID control system to grain chiller’s control system,in order to achieve the grain chiller outlet temperature and set temperature is always consistent.Through simulation,the fuzzy adaptive PID control combines with the strengths of fuzzy control and PID control,makes the control system has good dynamic quality and regulation accuracy.So for the grain chiller outlet temperature of this large time-delay,nonlinear control objects using fuzzy adaptive PID control can achieve better control effect.