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1756-L61S

1756-L61S

1756-L61S

1756-L61S

微分（D）控制 ：在微分控制中，控制器的輸出與輸入誤差信號的微分（即誤差的變化率）成正比關(guān)系。 自動控制系統(tǒng)在克服誤差的調(diào)節(jié)過程中可能會出現(xiàn)振蕩甚至失穩(wěn)。其原因是由于存在有較大慣性組件（環(huán)節(jié)）或有滯后組件，具有抑制誤差的作用，其變化總是落后于誤差的變化。解決的辦法是使抑制誤差的作用的變化“超前”，即在誤差接近零時，抑制誤差的作用就應(yīng)該是零。這就是說，在控制器中僅引入“比例”項(xiàng)往往是不夠的，比例項(xiàng)的作用僅是放大誤差的幅值，而目前需要增加的是“微分項(xiàng)”，它能預(yù)測誤差變化的趨勢，這樣，具有比例+微分的控制器，就能夠提前使抑制誤差的控制作用等于零，甚至為負(fù)值，從而避免了被控量的嚴(yán)重超調(diào)。所以對有較大慣性或滯后的被控對象，比例+微分(PD)控制器能改善系統(tǒng)在調(diào)節(jié)過程中的動態(tài)特性。
 

備貨，備貨，降降降，火火火，火火火……

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聯(lián)系人：小廖（銷售代表）

聯(lián)系電話：0592-6539066

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