Title :
Design of H∞ robust controller for electro-hydraulic IGC system of four-high mill based on genetic algorithm
Author :
Sun, Jian-Liang ; Peng, Yan ; Liu, Hong-Min
Author_Institution :
State Key Lab. of Metastable Mater. Sci. & Technol., Yanshan Univ., Qinhuangdao, China
Abstract :
The two degrees stand-rolls system model of four-high mill was built, the electro-hydraulic IGC servo system was further built. The weighting functions were optimized according to GA (genetic algorithm). The closed loop controller of roll gap was designed based on the H mixed sensitivity robust control theory because of the parameter uncertainty of the IGC model. Simulation results and comparison with the effect of PID control show that the robust controller designed has better disturbance attenuation performance for parameter uncertainty and external disturbance. The dynamics performances and stability of the electro-hydraulic IGC system were improved significantly.
Keywords :
H∞ control; control system synthesis; electrohydraulic control equipment; genetic algorithms; robust control; rolling mills; three-term control; uncertain systems; H mixed sensitivity robust control theory; H∞ robust controller design; PID control; closed loop controller; electrohydraulic IGC servosystem; four-high mill; genetic algorithm; parameter uncertainty; Algorithm design and analysis; Attenuation; Control systems; Genetic algorithms; Milling machines; Robust control; Servomechanisms; Stability; Three-term control; Uncertain systems; Electro-hydraulic IGC; Genetic algorithm; H∞ robust control; Parameter uncertainty;
Conference_Titel :
Mechatronics and Automation, 2009. ICMA 2009. International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4244-2692-8
Electronic_ISBN :
978-1-4244-2693-5
DOI :
10.1109/ICMA.2009.5246156
