鉱物処理プロセスにおける双線形濃度調節システムのファジィ制御

• 定木 淳

  正会員　工博　新日本製鉄（株）技術開発本部　主任研究員

• 岡野 靖彦

  正会員　工博　東京大学教授　大学院工学系研究家地球システム工学専攻

書誌事項

タイトル別名

• Fuzzy Control of a Bilinear Concentration Regulation System in Mineral Processing.
• コウブツ ショリ プロセス ニ オケル ソウセンケイ ノウド チョウセツ システム ノ ファジィ セイギョ

抄録

This paper describes applicability of fuzzy control to a bilinear (nonlinear) concentration regulation system, which is typically found in mineral processing, focusing on nonlinearity and deadtime. These bring difficulties in realizing control systems. To express plant characteristics in linguistic form, at first, the authors have carried out a series of plant operating simulations. Consequently, the key features in designing a fuzzy control system are pointed out. The results are summarized as follows: 1. Nonlinearity (a) The concept of gain-scheduling is indispensable, because the process gain and the time constant (mean residence time) depend on equilibrim points. (b) In order to deal with inverse -response which can be found at times, special control rules should be designed. 2. Normalized deadtime L/T (ratio of apparent deadtime to time constant) (a) As a number of cells becomes larger or back-mixing ratio becomes smaller, the ratio L/T becomes larger, where control gain cannot be set large enough. (b) The fact that the magnitude of inverse-response is well characterized by the ratio L/T can be utilized in designing a control system. The authors have designed a fuzzy control system for the bilinear plant, taking accounts of the points mentioned above. The control rules of the obtained fuzzy controller has a structure satisfying the above features of the term “Nonlinearity.” And, the output gain is set suitable for L/T. The fuzzy controller is better than that of conventional PID controller in that the former is applicable to wider ranges of process variable changes. In addition, the fuzzy controller is applicable to various deadtime with one rule table, because distinct relation exists between normalized deadtime L/T and magnitude of inverse-response.

収録刊行物

• 資源と素材

  資源と素材 115 (9), 677-682, 1999

  一般社団法人 資源・素材学会

キーワード

• 双線形
• ファジィ制御
• 非線形制御
• 逆応答
• 濃度調節
• 流れ特性

詳細情報

• CRID: 1390282680992293248
• NII論文ID: 10005758552
• NII書誌ID: AN10062646
• DOI: 10.2473/shigentosozai.115.677
• ISSN: 18806244
• ISSN: 09161740
• NDL書誌ID: 4862072
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4862072
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可