Research on Roller Characteristics of Two Degree of Freedom Rolling Mill Based on Vibration Absorber Control
LIU Bin1,JIANG Jia-lei1,PAN Gui-xiang1,WANG Xiao-dong2
1. School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
2. School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
Abstract：Considering the nonlinear spring force constraint of the four-roll mill hydraulic cylinder, the vibration absorber control device was introduced. Then, a two-degree-of-freedom rolling mill roll model with a vibration absorber was established. By analyzing the equilibrium point of the rolling mill coupling system, it is concluded that increasing the stiffness coefficient of the vibration absorber can effectively avoid the Hopf bifurcation and chaotic dynamic behavior. By analyzing the spectrum curve and the time domain curve, it is concluded that the vibration absorber device can be increased the distance between the resonant frequency. The main resonance frequency, and shorten the time when the rolling mill roller system converges from the unstable state to the stable period. Through the amplitude-frequency characteristic curve, it is concluded that reducing the mass of the vibration absorber within a certain range can improve the stability of the system. Increasing the spring force of the vibration absorber, the unstable region of the system can be get smaller. Increasing the friction of the vibration absorber, the vibration amplitude of the system can be reduced.
刘彬,姜佳磊,潘贵翔,王小冬. 基于吸振器控制的两自由度轧机辊系特性研究[J]. 计量学报, 2019, 40(5): 868-874.
LIU Bin,JIANG Jia-lei,PAN Gui-xiang,WANG Xiao-dong. Research on Roller Characteristics of Two Degree of Freedom Rolling Mill Based on Vibration Absorber Control. Acta Metrologica Sinica, 2019, 40(5): 868-874.
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2019, Vol. 40 
