熱電偶檢定爐的溫度控制具有大滯后、時(shí)變性等特點(diǎn), 常規(guī)的PID 控制在溫度變化較
大時(shí), 參數(shù)整定困難, 且調(diào)節(jié)時(shí)間過(guò)長(zhǎng)。目前應(yīng)用廣泛的模糊控制可有效提高響應(yīng)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(dāng)前測(cè)量點(diǎn)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(shí)間。實(shí)驗(yàn)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 .