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

fYear

2013

Firstpage

974

Lastpage

979

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2013 32nd Chinese

Conference_Location

Xi´an

Type

conf

Filename

6639568