1985 年 18 巻 6 号 p. 525-533
A singluar value analysis was carried out for the assessment of control structures of a distillation column. An analysis based on the IMC (Internal Model Control) structure shows that the material balance type of control structure is preferable to the conventional type and the ratio control type proposed by Ryscamp from the points of view of the sensitivity of the control quality to modeling errors and the size of the set point change which the closedloop system can handle for dual composition control.
Several types of modeling errors which typically appear in the distillation system were characterized by the maximum singular values and the robustness of the multivariable Pi-control system was studied within the framework of singular value analysis.
Computer simulations were carried out to illustrate the characteristics.
