進階搜尋


下載電子全文  
系統識別號 U0026-0108201718173200
論文名稱(中文) 以彈性指標為設計標準之開閉環路控制系統
論文名稱(英文) Open- and Closed- Loop Control System Designs Based on Flexibility Indices
校院名稱 成功大學
系所名稱(中) 化學工程學系
系所名稱(英) Department of Chemical Engineering
學年度 105
學期 2
出版年 106
研究生(中文) 吳瑞興
研究生(英文) Ruei-Shing Wu
學號 N36044042
學位類別 碩士
語文別 中文
論文頁數 95頁
口試委員 指導教授-張珏庭
口試委員-黃世宏
口試委員-陳誠亮
口試委員-鄭智成
中文關鍵字 彈性分析  開閉環路系統  操作限制  PID控制器參數 
英文關鍵字 Flexibility analyses  Open-loop control system  Closed-loop control system  Manipulation constraint  PID controller tuning 
學科別分類
中文摘要 傳統上,程序設計大多都是依據經濟效益作為評量標準,但在現實應用中存在不確定隨機變化的外界干擾,設計過程中採用的參數值可能會在極端狀況下改變,以致使系統無法操作,因此在設計過程中除了考慮成本以外,還需要確保操作的可行性。此外,一般認為程序設計與控制應在製程開發初期就同時考慮,以獲得同時具有操作彈性與經濟效益的實際系統。在過去的研究中,雖然已有學者利用動態與暫態彈性指標分析在參數不確定影響情況下動態系統的操作彈性,使設計者能夠以此性能指標作為設計衡量依據,但大多針對單元設計與配置對系統彈性的影響,對於實際操作情形下,藉由調整操作變數消除程序參數變動對彈性影響的議題未有廣泛的討論,且在閉環路控制系統中,PID控制器參數之設定亦未曾考慮系統操作上不等式限制以及干擾的特性。因此在本研究中,我們將探討開環路系統中操作變數的限制對操作彈性可能帶來的影響,以及發展閉環路系統中以彈性指標為PID控制器參數設定和控制手段選擇依據之方法。
英文摘要 The chemical processes, designed according to the nominal operating conditions and parameters, have traditionally been evaluated with economic criteria. This approach often ends up with an inoperable plant if some of the conditions/parameters significantly deviate from their nominal values. Thus, in addition to the capital and operating costs, it is important to consider operational flexibility in a design. Furthermore, it is also beneficial to address the design and control issues simultaneously in early stage of process development.
The dynamic and temporal flexibility indices are performance indices for characterizing the operational flexibility of open-loop unsteady processes. The previous analyses focused primarily on the effects of adjusting design parameters, while ignored the roles of control variables. In addition, since one is free to adjust these control variables at will in computing the above indices, there are incentives to impose additional constraints to produce assessments that are more realistic. Therefore, the aim of this study is to develop an improved vertex method for computing the dynamic flexibility index in order to circumvent the aforementioned drawbacks.
Since the control variable is a function of the online measurement in a closed-loop system, this work also proposes a tuning method to determine the PID controller parameters according to the dynamic flexibility index. From the simulation results obtained in the single- and double-tank buffer systems, we found that this approach yields the best controller under specified disturbances. Furthermore, from the simulation results obtained in the SMDDS (Solar Membrane Distillation Desalination System) example, one can also conclude that the proposed design strategy is effective for PID controller tuning in periodic or dynamic processes.
論文目次 口試委員會審定書 #
中文摘要 i
Extended Abstract ii
誌謝 viii
目錄 x
表目錄 xiii
圖目錄 xv
符號表 xvii
第一章 緒論 1
1.1 研究動機 1
1.2 文獻回顧 1
1.3 研究目的 3
1.4 組織章節 3
第二章 操作彈性分析 5
2.1 彈性指標的數學模型 5
2.1.1 穩態彈性指標之定義 5
2.1.2 動態彈性指標之定義 7
2.1.3 暫態彈性指標之定義 8
2.2 數值求解方法 9
2.2.1 穩態彈性指標的計算 10
2.2.2 動態彈性指標的計算 12
2.2.3 暫態彈性指標的計算 16
2.3 簡單案例 20
2.3.1 系統描述 20
2.3.2 連續性進料 21
2.3.3 週期性操作 25
第三章 開環路控制系統的實際操作彈性 31
3.1 開環路系統中可調控變數之實際限制 31
3.2 單水槽液位系統 33
3.2.1 連續操作 34
3.2.2 時變性操作 38
3.3 雙水槽液位系統 40
3.3.1 連續操作 42
3.3.2 時變操作 44
3.4 太陽能驅動薄膜蒸餾海水淡化程序(SMDDS) 49
3.4.1 單元模式 51
3.4.2 參數與規格 55
3.4.3 太陽能吸收器設計規格對程序彈性的影響 58
3.4.4 可調控變數操作限制對程序彈性的影響 64
3.5 結語 67
第四章 考慮操作彈性的PID控制器參數之設定 69
4.1 傳統PID控制器參數設定準則 69
4.2 案例探討 74
4.2.1 閉環路單水槽液位系統 74
4.2.2 閉環路雙水槽液位系統 79
4.2.3 閉環路太陽能驅動薄膜蒸餾海水淡化程序 86
4.3 結語 89
第五章 結論與展望 91
5.1 研究結論 91
5.2 未來展望 91
參考文獻 93

參考文獻 Adi, V. S. K., and Chang, C. T., A mathematical programming formulation for temporal flexibility analysis. Comput. Chem. Eng. 2013, 57, 151.
Adi, V. S. K., and Chang, C. T., Development of flexible designs for PVFC hybrid power systems. Renew. Energ. 2015, 74, 176.
Ang, K. H., Chong, G., and Li, Y., PID control system analysis, design, and technology. IEEE Transactions on Control Systems Technology, 2005, 13(4), 559.
Brengel, D. and Seider, W., Coordinated design and control optimization of nonlinear processes. Computers & Chemical Engineering. 1992, 16(9), 861.
Ben Bacha, H., Dammak, T., Ben Abdalah, A. A., Maalej, A. Y., and Ben Dhia, H., Desalination unit coupled with solar collectors and storage tank: modeling and simulation. Desalination. 2007, 206, 341.
Chang, H., Wang, G. B., Chen, Y. H., Li, C. C., and Chang, C. L., Modeling and optimization of a solar driven membrane distillation desalination system. Renew. Energ. 2010, 35, 2714.
Chang, H., Lyu, S. G., Tsai, C. M., Chen, Y. H., Cheng, T. W., and Chou, Y. H., Experimental and simulation study of a solar thermal driven membrane distillation desalination process. Desalination. 2012, 286, 400.
Dimitriadis, V. D., and Pistikopoulos, E. N., Flexibility analysis of dynamic system. Ind. Eng. Chem. Res. 1995, 34, 4451.
Dimitriadis, V. D., Shah, N., and Pantelides, C. C., Modeling and safety verification of discrete/continuous processing systems. AIChE J. 1997, 43, 1041.
Grossmann, I. E., and Floudas, C. A., Active constraint strategy for flexibility analysis in chemical process. Comput. Chem. Eng. 1987, 11, 675.
Kuo, Y. C., and Chang, C. T., On heuristic computation and application of flexibility indices for unsteady process design. Industrial & Engineering Chemistry Research. 2016. 55(3), 670.
Lima, F. V., and Georgakis, C., Design of output constraints for model-based non-square controllers using interval operability. J. Process Contr. 2008, 18, 610.
Lima, F. V., Georgakis, C., Smith, J. F., Schnelle, P. D., and Vinson, D. R., Operability-based determination of feasible control constraints for several high-dimensional nonsquare industrial processes. AIChE J. 2009, 1249.
Lima, F. V., Jia, Z., Ierapetritou, M., and Georgakis, C., Similarities and differences between the concepts of operability and flexibility: the steady-state case. AIChE J. 2010, 56, 702.
Malcom, A., Polan, J., Zhang, L., Ogunnaike, B. A., and Linninger, A. A., Integrating systems design and control using dynamic flexibility analysis. AIChE J. 2007, 53, 2048.
Swaney, R. E., and Grossmann, I. E., An index for operational flexibility in chemical process design part I: formulation and theory. AIChE J. 1985, 31, 621.
Swaney, R. E., and Grossmann, I. E., An index for operational flexibility in chemical process design part II: formulation and theory. AIChE J. 1985, 31, 631.
Skogestad, S., Simple analytic rules for model reduction and PID controller tuning. Journal of Process Control. 2003, 13(4), 291.
Seborg, D., Edgar T., and Mellichamp D., Process dynamics and control - 2nd ed., John Wiley & Sons, 2004.
Sanchez-Sanchez, K., and Ricardez-Sandoval, L., Simultaneous design and control under uncertainty using model predictive control. Industrial & Engineering Chemistry Research. 2013, 52(13), 4815.
Wu, R. S., and Chang, C. T., Development of mathematical programs for evaluating dynamic and temporal flexibility indices based on KKT conditions. Journal of the Taiwan Institute of Chemical Engineers. 2017, 73, 86.
Zhou, H., Li, X. X., Qian, Y., Chen, Y., and Kraslawski, A., Optimizing the initial conditions to improve the dynamic flexibility of batch processes. Ind. Eng. Chem. Res. 2009, 48, 6321.
論文全文使用權限
  • 同意授權校內瀏覽/列印電子全文服務,於2017-08-04起公開。
  • 同意授權校外瀏覽/列印電子全文服務,於2017-08-04起公開。


  • 如您有疑問,請聯絡圖書館
    聯絡電話:(06)2757575#65773
    聯絡E-mail:etds@email.ncku.edu.tw