促進・抑制操作量を有する化学プロセスの制御系設計法

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  • A Control Design of Chemical Processes with Promoting and Repressing Inputs.
  • ソクシン ヨクセイ ソウサリョウ オ ユウスル カガク プロセス ノ セイギョ

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Some chemical processes such as pH regulation by acid and/or base reagent additions are manipulated by promoting and/or repressing inputs. Using an optimization method such as linear programing may provide a basic solution of the system control problem. However, this approach is not practical for real-time control because of the large amount of computing time. When the promoting and repressing inputs are on a parity with each other in the sense that a negative quantity of input can be replaced always by a positive quantity of the other input in the mathematical model of the system, favorable control can be attained by accomodation of two parallel feedback controllers which are designed separately for two single-input single-output systems with a disturbance of each other's input. The control design method proposed in this paper can be easily extended to adaptive control by adding a suitable on-line model identifier. The usefulness of this adaptive control is investigated experimentally for pH regulation in a laboratory apparatus.

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