A Robustness Study for Chemical Process Control

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Iori Hashimoto¹  Jian Chu¹  JiCheng Wang¹  Takeichiro Tanamatsu¹  Masahiro Ohshima¹ 

[1] Department of Chemical Engineering, Kyoto University

关键词: Robustness;    Robustness Degree;    Nonlinear System;    Semigroup Theory;    Matrix Measure;    Chemical Process;   

DOI  :  10.1252/jcej.22.30

来源: Maruzen Company Ltd

【 摘 要 】

References(9)Cited-By(2)Generally, chemical processes behave nonlinearly. But existing well-developed controller design techniques are based on linearized models of nonlinear processes. The neglected nonlinear effects affect the stability of control systems. Robustness degree, a new measure for robust control, is introduced and studied from the engineering point of view. The concept of robustness degree, proposed by applying the semigroup theory of functional analysis, can play a role in analysis and design of control systems. It is a sufficient and quantitative measure of the margin of stability within which certain nonlinear functions and modelling errors can be tolerated. Robustness degree of an open-loop or closed-loop system is linked with system matrix measure as an estimation that is straightforward and easy to calculate. A chemical reactor is studied as an example of robust control system design by this approach.

【 授权许可】

Unknown