• 作者： 曾衍迪; 鄭西顯; 汪上曉
• 作者服務機構： 清華大學化工系
• 中文摘要： 在化工的程序中，通常很不容易將精確的模式運用在控制上。主要的原因是由於：第一，程序一般都相當複雜而無法作線上的模擬，除非使用超級電腦。第二，即使使用精確的模式模擬，仍然會存在模式的誤差，而非線性韌性分析的理論卻依然尚未成熟。因此，本研究的目的，在找出一個低價位的計算環境，使真時模式控制成為可能。同時，架構出一個非線性系統的識別方式，用以補償模式與真實程序之問的誤差。 在本研究中，一個逐板式的蒸餾塔用以模擬程序，而一個平行化的降階模式用以計算控制此一完全的程序。控制的方法是基於解一非線性極值問題。其模式與程序之誤差以一線上的識別方式來補償。此識別的方式是解出測量值和模式預測值的最小誤差來得到。模擬的結果顯示此控制的策略可行。
• 英文摘要： It is usually difficult to implement a rigorous model for chemical process control. The main reasonis that the plant is usually very complicated to model; hence, real time simulation is not possible unlessa super computer is implemented. Moreover, despite rigorous implementation there still may exist modelingerrors, and nonlinear robust control theory is still immature. The purpose of this work is to establisha feasible computer environment for real time model-based control of a distillation column. On the otherhand, on-line identification of a nonlinear system scheme is implemented to compensate for the plant-model mismatch problem. In this work, a tray-by-tray distillation plant is simulated, and a parallel reduced order distillationmodel is implemented to control the full order process. The control approach is based on solving a nonlinearoptimization problem. The plant/model mismatch is compensated for by implementing an on-line iden-tification scheme. The real-time identification problem is also solved by minimizing the errors betweenmodel-predicted and real measurements from the plant sensors. The simulation results show that the real-time control scheme is feasible for the distillation process.
• 中文關鍵字： real-time control; parallel model; rigorous model; distillation process
• 英文關鍵字： --