Title :
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
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;
Conference_Titel :
Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5589-X
DOI :
10.1109/IAS.1999.801672
