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| Research on Time Delay Feedback of Roll System Based on Vibration Absorber Control |
| LIU Bin,WANG Ying-hui,JIANG Jia-lei,LIU Shuang |
| School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract Considering the nonlinear spring force constraint of the four-roll mill hydraulic cylinder, a two-degree-of-freedom rolling mill roll model with a vibration absorber was established. Time-delay feedback control function was introduced. Time-delay feedback control equation for vibration displacement and vibration velocity of rolling mill roller system with vibration absorber was designed. By analyzing the stability of the amplitude limit and amplitude-frequency characteristics of the rolling mills vibration limit loop, the influence of different feedback gain parameters and time-delay parameters on the main system of the rolling mill roll system is obtained. Appropriate increase of the feedback gain coefficient g1 and g2, reduce the delay coefficient τ1 and τ2 can improve the stability and convergence of the system, which provides theoretical support for suppressing mill vibration.
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Received: 09 October 2018
Published: 29 June 2020
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2020, Vol. 41 
