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AIO288模擬量輸入輸出模塊

價格
¥100.00

型號
AIO288

品牌
進口

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暫無

更新時間
2021-10-29 17:48:33

瀏覽次數(shù)


    Profit Loop PKS是一個基于模型預測控制器。Profit Loop PKS Assistant是一個簡化Profit Loop PKS配置活動的工具,來實現(xiàn)模型定義。在PVC的控制系統(tǒng)設計過程中,我們在PVC控制邏輯中選定了幾個控制效果不理想的控制回路實施從PID轉到Profit Loop的控制,均取得了理想的效果。  AIO288模擬量輸入輸出模塊

    廈門仲鑫達自動化設備有限公司

    聯(lián)系人:李素云

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      首先應該根據(jù)不同回路類型的特點,在PVC控制方案中,選擇要實現(xiàn)Profit Loop控制的控制回路。

      PID-PL 功能塊作為功能塊的一種,可以在Control Builder中的功能塊Library中直接調用,實現(xiàn)替代傳統(tǒng)PID功能塊作用。在確定了要實現(xiàn)Profit Loop控制的控制回路以后,在組態(tài)的時候應確定用PID-PL 功能塊。

      應用Profit Loop,需要獲得過程模型。進行過程模型系統(tǒng)識別,既是過程如何相應輸入變化的數(shù)學表達式,使控制器過去的輸出OP值和將來預測的PV值聯(lián)系起來。Profit Loop PKS model可以從現(xiàn)有的PID參數(shù)直接轉換而來,也可以通過階越函數(shù)測試獲得。在濱化PVC項目中,我們主要應用了第二種方法來獲得系統(tǒng)模型。

      在測試完成后,對回路進行整定的方式有兩種,種可以通過輸入PID參數(shù)實現(xiàn);第二種可以通過針對PID-PL回路輸入的整定參數(shù)實現(xiàn)。在第二種方式中通過簡單地增加性能比值來減慢調節(jié)動作的速度,同時增加魯棒性。反之,如果調節(jié)器動作太慢,則可以通過減少性能比值來加速閉環(huán)調節(jié)器的響應。

      Honeywell公司的EPKS C300 DCS控制系統(tǒng),融入霍尼韋爾數(shù)十年的過程控制、資產(chǎn)管理、領域的經(jīng)驗,融合新控制和現(xiàn)場總線技術。應用EPKS C300系統(tǒng)的濱化PVC項目于08年8月建成并投產(chǎn),運行良好。同期建設的濱化的離子膜,三氯乙烯,粒堿,環(huán)氧丙烷等項目也應用了EPKS C300系統(tǒng),也都取得了良好的經(jīng)濟效果。




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