板带轧机主传动非线性系统扭振控制研究

发布时间：2018-06-26 02:07

本文选题：主传动系统 + 非线性　；参考：《华北理工大学》2017年硕士论文

【摘要】：在钢铁工业生产中,随着轧制速度的进一步提升,板带轧机主传动系统的扭转振动现象越来越突出。轧机发生扭振时会影响到扎件的质量和产量,振荡激烈时甚至会对轧制设备造成不可逆损害。因此控制板带轧机主传动系统的扭转振动现象对于当今钢铁行业具有重要的意义。针对轧机主传动系统存在不可忽略非线性因素的问题,考虑非线性阻尼和非线性刚度等因素,建立并完善了以电机转速,负载转速和接轴扭矩为状态变量的二质量系统模型。通过与传统线性自抗扰控制系统进行对比,证明了自抗扰控制方法对于非线性系统的可行性和有效性,并可将转速降控制在0.77%以内,为解决轧机主传动非线性扭振问题提供了有效方法。同样在传统线性模型的基础上,考虑间隙和非线性刚度等因素,建立了板带轧机主传动二质量系统模型。设计了基于扩张状态观测器的轧机主传动Terminal滑模控制系统。通过与轧机主传动线性自抗扰控制系统进行对比,证明了基于扩张状态观测器的Terminal滑模控制的可行性和有效性,为解决轧机主传动非线性扭振问题提供了新思路。搭建了机电耦合模拟平台,验证了扭振的存在。将PC作为控制终端。完成了数据量的采集,绘制图像进行实时监控显示,并对图像结果进行了分析。最后运用PID算法实现了定速调节功能。图像表明,扭振发生时存在转速差;过渡过程会影响响应时间,进而影响系统的稳定性;载荷突变会引起电机的转速降。
[Abstract]:In the steel industry, with the further improvement of the rolling speed, the torsional vibration of the main drive system of the strip mill is becoming more and more prominent. The torsional vibration of the rolling mill will affect the quality and the output of the ligation. The irreversible damage to the rolling equipment will even be caused when the oscillation is fierce. The torsional vibration of the main drive system of the strip mill is controlled by this control plate The phenomenon is of great significance for the iron and steel industry. In view of the problem that the main drive system of rolling mill can not be ignored, the two mass system model, which takes the speed of the motor, the speed of the load and the torque of the shaft as the state variable, is established and perfected by considering the nonlinear damping and the nonlinear stiffness. The interference control system is compared, which proves the feasibility and effectiveness of the self disturbance rejection control method for nonlinear systems, and can control the speed drop within 0.77%. It provides an effective method to solve the nonlinear torsional vibration problem of the main drive of rolling mill. The main drive two quality system model of the strip mill is designed. A sliding mode control system of the main drive Terminal based on the extended state observer is designed. By comparing with the linear auto disturbance rejection control system of the main drive of the rolling mill, the feasibility and effectiveness of the Terminal sliding mode control based on the extended state observer are proved, in order to solve the main transmission of rolling mill. The linear torsional vibration problem provides a new idea. The electromechanical coupling simulation platform is set up to verify the existence of the torsional vibration. PC is used as the control terminal. The data is collected, the image is displayed in real-time monitoring and display, and the image results are analyzed. Finally, the speed regulation function is realized with the PID algorithm. The image shows that the torsional vibration occurs when the torsional vibration occurs. When the speed is poor, the transient process will affect the response time, and then affect the stability of the system. Sudden changes in load will cause the motor speed drop.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG333;TP273

【参考文献】