板带热连轧机活套控制系统优化

针对板带热连轧机传统活套控制策略不能满足实际生产需求的问题，给出活套电机力矩的计算方式和采用电流反馈信号的张力检测方式，提出基于软接触控制、防甩尾控制和流量补偿功能的活套优化控制策略。将优化后的活套控制策略应用于热连轧生产线，结果表明，对于3.0mm×520mm规格的带钢，活套角度波动范围可控制在±2°之内，活套电流在设定值的±5%波动，头部厚度偏差±40μm范围内厚度精度命中率能够达到98.7%，宽度偏差0~4mm范围内厚度精度命中率能够达到96.9%，带钢头尾尺寸精度显著提高。

Optimization of Looper Control Systems for Hot Strip Mills

Aiming at the problems that traditional looper control systems could not meet the requirements of practical productions, the calculation method of looper motor torques and the detection methods of tension were given according to looper currents, the optimal control strategies of loopers were put forward based on the soft touch method, no whip control method and flow compensation method. The optimized looper control system was applied in a hot strip mill, and the practical application results show that with the specification of 3.0mm×520mm, the angles of loopers may be controlled within the target tolerances of ±2°, the currents of loopers may be controlled within the target tolerances of ±5%. The thickness may be controlled within the allowable thickness deviation of ±40μm over 98.7%, and the strip width deviation may be controlled within the target tolerances of 0～4mm over 96.9% of the strip steels and the precision of strip head and tail is enhanced.