熱電偶檢定爐的溫度控制具有大滯后、時變性等特點, 常規(guī)的PID 控制在溫度變化較
大時, 參數(shù)整定困難, 且調(diào)節(jié)時間過長。目前應用廣泛的模糊控制可有效提高響應速度, 但其穩(wěn)態(tài)誤差較大, 為了提高穩(wěn)態(tài)精度, 本文提出了一種基于當前測量點之前幾分鐘的輸出平均功率的模糊控制算法。提高了控制精度, 縮短了調(diào)節(jié)時間。實驗證明, 這種控制方法能取得令人滿意的控制效果。
The temperat ure cont rol of t he thermocouple calibrated f urnace has such character s as
large time delay and time varying etc. When temperat ure variety is great , t he routine PID has difficult to gain parameter , and it will make t he system has long adjust time. The Fuzzy cont rol can improve the respond rate , but it has great steady error when the system is in t he constant temperat ure p hases, For t he sake of precision , we advance a f uzzy cont rol arit hmetic which based on outp ut average power which before t he current measurement point . it overcome t he system’s time delay and time2var2 iability , improve the p recisionand shorten t he adjust time. The practical application proved t hat this met hod can obtain t he satisfactory result .