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Neural Net based Quality Modeling and Control Systems for Polymerization Processes

Research Project

Project/Area Number 05650392
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

HASHIMOTO Iori  Kyoto Univ., Chem.Eng., Professor, 工学部, 教授 (40026076)

Co-Investigator(Kenkyū-buntansha) KANO Manabu  Kyoto Univ., Chem.Eng., Instructor, 工学部, 助手 (30263114)
HASEBE Shinji  Kyoto Univ., Chem.Eng., Associate Professor, 工学部, 助教授 (60144333)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1994: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsQuality Modeling / Quality Control / On-line inference / Neural Net / Polymerization Reactor Control / quality modeling / MFR / High density Polyethylene Process / Midel predictive Control / Multilate control / Kalman Filter / SPC / quality surveillance system
Research Abstract

In this study, an on-line inferential scheme is proposed in order to predict a polymer property, the Melt Index, form off-line, past measured values of this property and available on-line measured process variables. In the on-line inferential scheme, the L infinity wave-net, which is an artificial nenural network with basis functions drawn from the family of wavelets, is utilized by incorporating fundamentals of chemical engineering. The multistep predictor, formulated in a cascaded structure of identical one-step-ahead Wave-Net based predictors, is adaptively learning the functional relationship between the polymer property and process variables. The application of the scheme is illustrated using operating data for an industrial High Density Polyethylene Process. The results of the proposed scheme show that the inferential scheme built upon the Wave-Net can successfully predict the MI and prove its potential as an on-line monitoring scheme to maintain the polymer quality at the highest level.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 橋本伊織: "プラントオペレーションとプロセス制御" 化学工学. 57. 315-319 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Watanabe: "Quality control system for an industrial high density polyethylene process" American Institute of Chemical Engineering Advances in Process Control. 149. microfiche (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 大嶋正裕: "多周期多変数モデル予測制御の設計法" 化学工学論文集. 20. 240-247 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Ohshima: "Grade transition control for an Impact copoly merization reactor" Proc.of Int.Symp.on Advanced Chemical Process Control'94. 507-512 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Kano: "Maltirate coordinated control for Chemical Proces" Proc.of the first Asian Control Conference. 517-520 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] F.Watanabe: "Quality control system for an industrial high density polyethylene process" American Institute of Chemical Eng. Advances in Process Control, microfiche No.149m. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Hashimoto: "Plant Operation and Process Control" Kagaku Kogaku. vol.57, No.5. 315-319 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Ohshima: "Multirate Multivariable Model Predictive Control" Kagaku Kogaku Ronbunsyu. vol.20, No.2. 240-247 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Ohshima: "Grade transition control for an impact co-polymer-ization process" Proc.of Int.Symp.on Advanced Chemical Process Control. 507-512 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Kano: "Multirate coordinated control for chemical process" Proc.of the first Asian Control Conf.515-520 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Hashimoto: "New Developments in Process Control-From Unit Control to Plant Wide Control" Systems/Control/Information. vol.38, No.10. 519-526 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 橋本 伊織: "プラントオペレーションとプロセス制御" 化学工学. 57. 315-319 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] F.Watanabe: "Quality control system for on industrial high densitypolyethy lene process" American Institute of Chemical Engineering Advances in Process Control. 149(microfiche). (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 大嶋 正裕: "多周期多変数モデル予測制御の設計法" 化学工学論文集. 20. 240-247 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Ohshima: "Grade transition control for an impoct copoly merization reactor" Proc.of Int.Symp.on Advanced Chemical Process Control'94. 507-512 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Kano: "Multirate coordinated control for Chemical process" Proc.of the first Asian Control Conference. 517-520 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 大嶋,加納,橋本,大野: "多周期多変数モデル予測制御の設計法" 化学工学論文集. 20. (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] F.WATANABE,M.OGAWA,M.OHSHIMA,I.HASHIMOTO: "Quality Control System for an Industrial High Density Polyethylene process" AtlhE.St.Lowis Meeting. SN-149. PN149-19 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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