厚度计AGC应用中存在的问题及对策

Existing Problems of Gauge Meter AGC in Application and Solutions

现场应用情况表明,厚度计AGC存在两个重要问题:轧辊偏心导致厚度计AGC产生错误的辊缝调节量,与监控AGC同时使用时存在相互干扰.结合厚度计AGC的原理和实际应用情况,对存在的问题进行了详细分析.针对轧辊偏心问题应用了轧制力偏心滤波方法,既滤掉了轧辊偏心的干扰又有效反映了辊缝调节;针对与监控AGC相互干扰的问题,对这两种AGC的调节量进行了相关性处理,避免了两者重复调节或反向调节.现场应用效果表明,问题得到了很好的解决,满足了厚度控制精度的要求.

In-situ application indicated that the two important problems of AGC were found： the roll eccentricity results in wrong roll gap adjustment that is provided by the gauge meter AGC; there is mutual interference when the monitor AGC is also used simultaneously as a monitor. The two problems are discussed in detail via the combination of the principle of AGC with its actual applications. For the problem evoked by roll eccentricity, a filtering technique is introduced to filter off the disturbance due to roll eccentricity and provide correct roll gap adjustment effectively. For the problem of mutual interference evoked by using monitor AGC simultaneously, the correlation between the two adjustments obtained in different ways is processed to avoid repeated or opposite adjustments. Application results indicated that the problems are thus solved well to meet the requirement for thickness control precision.