【摘要】 考虑四辊轧机液压缸非线性弹簧力约束的因素,建立带有吸振器的两自由度轧机辊系模型。引入时滞反馈控制函数,设计带吸振器的轧机辊系振动位移、振动速度时滞反馈控制方程。通过分析轧机辊系振动极限环幅值和幅频特性的稳定性,得到不同反馈增益参数和时滞量参数对轧机辊系主系统的影响规律。适当地增大反馈增益系数g₁和g₂,减小时滞量系数τ₁和τ₂,可以改善系统的稳定性和收敛性。更多还原

【Abstract】 Considering the nonlinear spring force constraint of the four-roll mill hydraulic cylinder,a two-degree-offreedom 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 mill’s 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.更多还原