TY - GEN
T1 - A robust fractional order controller for an EAF electrode position system
AU - Feliu-Batlle, V.
AU - Rivas-Perez, R.
AU - Castillo-Garcia, F. J.
AU - Rodriguez-Martinez, C. A.
N1 - Publisher Copyright:
© IFAC.
PY - 2014
Y1 - 2014
N2 - This paper proposes a simple fractional-order controller with a PI structure for controlling the position of the electrodes of an electric arc furnace (EAF). The dynamics of one of the three electrodes of an industrial EAF process was experimentally identified. Models of the electrode position system and the furnace electrical system (electric arc impedance model) were obtained. This identification procedure yielded an equivalent fourth order plus time delay transfer function, and showed strong plant parameter variations and measured and unmeasured disturbances. We therefore propose a new methodology for the design of fractional-order robust controllers for this system. By carrying out a partial inversion of the dynamics, a method for fractional-order robust control of first order plus time delay plants was developed and applied to this process. It was shown that the attained controllers significantly outperformed the robustness achieved with PI and PID controller (also combined with the partial dynamics inversion term), while adding only moderate complexity to the control structure.
AB - This paper proposes a simple fractional-order controller with a PI structure for controlling the position of the electrodes of an electric arc furnace (EAF). The dynamics of one of the three electrodes of an industrial EAF process was experimentally identified. Models of the electrode position system and the furnace electrical system (electric arc impedance model) were obtained. This identification procedure yielded an equivalent fourth order plus time delay transfer function, and showed strong plant parameter variations and measured and unmeasured disturbances. We therefore propose a new methodology for the design of fractional-order robust controllers for this system. By carrying out a partial inversion of the dynamics, a method for fractional-order robust control of first order plus time delay plants was developed and applied to this process. It was shown that the attained controllers significantly outperformed the robustness achieved with PI and PID controller (also combined with the partial dynamics inversion term), while adding only moderate complexity to the control structure.
KW - Electric arc furnace
KW - Electrode position system
KW - Fractional order controllers
KW - Robust control systems
UR - http://www.scopus.com/inward/record.url?scp=84929753375&partnerID=8YFLogxK
U2 - 10.3182/20140824-6-za-1003.01925
DO - 10.3182/20140824-6-za-1003.01925
M3 - Conference contribution
AN - SCOPUS:84929753375
T3 - IFAC Proceedings Volumes (IFAC-PapersOnline)
SP - 10670
EP - 10675
BT - 19th IFAC World Congress IFAC 2014, Proceedings
A2 - Boje, Edward
A2 - Xia, Xiaohua
PB - IFAC Secretariat
T2 - 19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014
Y2 - 24 August 2014 through 29 August 2014
ER -