摘要
利用N4SID子空间辨识方法对南钢2800 mm中厚板精轧机系统的性能进行了分析。选取轧机的测量信号构成辨识对,利用子空间辨识方法,得到轧机在工作时的高阶动态数学模型。机架在0.63 Hz处有一振动频率,当轧辊旋转频率与该频率一致或接近时容易激发机架振动,对板形和设备正常运转影响较大。实际生产中,精轧机应避免在上述振动频率对应的转速范围36.0～39.0 r.min-1内进行轧制,速度调整后板形得到很好控制,表明模型在轧机系统性能改进分析中是有效的。
The performance of a roll system was identified on a 2800 mm heavy plate finishing rolling mill in Nanjing Steel Company using the subspace identification approach N4SID. A high order dynamic mathematical model for the working mill was constructed through signal choice and identification pair construction. It was shown that when the rotation frequency of the roll is about 0.63 Hz, a mode of vibration occurs in the mill, the mill vibration is induced and the plate shape and the normal operation of equipments are influenced; in practical production, the rotation rate range of 36.0 -39. 0 r · min^-1 for the finishing rolling mill must be avoided and the plate shape is controlled after speed adjustment ; so, the validity of this model in the analysis of the performance of the roll system is verified.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第4期142-145,共4页
Journal of Vibration and Shock
关键词
中厚板精轧机
系统性能
N4SID子空间辨识
振动模态
heavy plate finishing rolling mill
system performance
N4SID subspaee identification
vibration mode
