Sensitivity analysis of an LQ optimal multivariable controller for a fine coal injection vessel

Author

Birk, Wolfgang ; Medvedev, Alexander

Author_Institution

Control Eng. Group, Lulea Univ. of Technol., Sweden

Volume

2

fYear

1999

fDate

1999

Firstpage

1322

Abstract

This paper deals with a sensitivity analysis of an LQ optimal multivariable controller for a fine coal injection vessel used in the blast furnace process. The multivariable controller from a previous work is briefly presented and the closed loop system is studied by means of a sensitivity analysis. Effects of disturbances and uncertainty on the closed loop system are studied based on analysis of the singular values of the sensitivity and the complementary sensitivity functions, the relative gain array and the minimized condition numbers. Finally, the sensitivity analysis is validated by the use of logged data from test operation at the coal injection plant at SSAB Tunnplat Lulea, Sweden

Keywords

closed loop systems; furnaces; linear quadratic control; metallurgical industries; multivariable control systems; sensitivity analysis; LQ optimal multivariable controller; SSAB Tunnplat Lulea; Sweden; blast furnace; blast furnace process; closed loop system; complementary sensitivity functions; disturbances effects; fine coal injection vessel; iron production; minimized condition numbers; relative gain array; sensitivity analysis; sensitivity singular values; uncertainty effects; Blast furnaces; Closed loop systems; Control engineering; Control systems; Iron; Nitrogen; Optimal control; Production; Sensitivity analysis; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE

Conference_Location

Phoenix, AZ

ISSN

0197-2618

Print_ISBN

0-7803-5589-X

Type

conf

DOI

10.1109/IAS.1999.801672

Filename

801672