Title :
Active disturbance rejection control for electro-hydraulic servo system of aluminum strip cold rolling mill
Author :
Wang Zhe ; Li Jing ; Wang Jing ; Zhang Fei ; Zhao Li
Author_Institution :
Nat. Eng. Res. Center of Adv. Rolling, Univ. of Sci. & Technol. Beijing, Beijing, China
Abstract :
Active disturbance rejection control (ADRC) is proposed for electro-hydraulic servo system of aluminum strip cold rolling mill to satisfy industrial requirements. Based on ADRC, the total disturbance including internal dynamics and external load force uncertainties are estimated and actively compensated in real time. The stability and robustness of the system is analyzed in frequency domain using Nyquist diagrams, Bode diagrams and relative stability. Simulation results verified the superiority of the proposed solution in comparison with an existing PID controller tuned via modified Z-N method.
Keywords :
Bode diagrams; Nyquist diagrams; aluminium; cold rolling; compensation; electrohydraulic control equipment; frequency-domain analysis; robust control; rolling mills; servomechanisms; strips; uncertain systems; ADRC; Bode diagrams; Nyquist diagrams; active disturbance rejection control; aluminum strip cold rolling mill; electro-hydraulic servo system; external load force uncertainty compensation; frequency domain; industrial requirements; internal dynamics compensation; relative stability; robustness; total disturbance; Dynamics; Force; Mathematical model; Observers; Servomotors; Stability analysis; Transfer functions; Active disturbance rejection control; Bode diagram; Nyquist diagram; electro-hydraulic servo system; relative stability;
Conference_Titel :
Control Conference (CCC), 2013 32nd Chinese
Conference_Location :
Xi´an
