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題 名 | Output Feedback Control of an Unstable CSTR with Measurement Delay: A Comparative Study=含裝置上延遲的非穩定連續攪拌反應器之輸出回饋控制: 比較性研究 |
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作 者 | 吳煒; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 29:1 1998.01[民87.01] |
頁 次 | 頁25-37 |
分類號 | 460.02 |
關鍵詞 | 非穩定連續攪拌反應器; 輸出回饋控制器; Nonlinear observer-based control; Disturbance rejection; Multiple steady states; Time delay; |
語 文 | 英文(English) |
中文摘要 | 本文探討三種輸出回饋控制器包括比例增益控制( PI ),以狀態空間表示之非 線性內部模式控制( NIMC ),以及所提動態型輸出回饋控制器( DOFC ),藉由一發生續 攪拌反應器內之放熱平行反應例子,目的是要提供一些比較性結果。若考慮程序裝置上延遲 與啟始操作條件為已知, 針對具多重穩態程序時利用 Z-N 調諧方法設計 PI 控制器是可達 設定點無誤差及干擾消除。再則,所謂 NIMC 方法因包含一開環路模式,所以在做大範圍輸 出循跡控制會有明顯退化。 至於 DOFC 方法乃是利用 Fliess' 線性化方式設計非線性似 Luenberger 觀測器予結合成動態型輸出回饋控制。 藉由完整理論分析,發現所謂 DOFC 設 計方法對系統不確定及裝置上延遲是具有韌性的。 |
英文摘要 | This paper presents several comparative results for three output feedback controllers, i.e., proportional-integral (PI) control, state-space formulation of nonlinear internal model control (NIMC), and dynamic output feedback control (DOFC), for exothermic parallel reactions in a continuously stirred tank reactor. Under the known measurement delay, initial operating points, and multiplicity behavior of the process, the linear PI controller with the Z-N tuning method can provide the no offset performance for set point change and disturbance rejection. Since the NIMC design incorporates an openloop model, the output regulation of an unstable system may be obviously degraded within large operating region. The DOFC design which combines a dynamic state feedback through Fliess' linearization algorithm with a nonlinear Luenberger-type observer can provide a smooth and stable regulation response in an arbitrary operating region. With the aid of a complete theoretical analysis, it is also found that the DOFC design is robust to uncertainty and measurement delay. |
本系統中英文摘要資訊取自各篇刊載內容。