Application of Preview Control for Extrusion Production Line for Siding (2nd Report)

Method for Change of Control Characteristics and the Result of Actual Line

Abstract

Extrusion is a typical production method of siding used as a board for surfacing the outside wall of a building. In order to manufacture it with high quality, it was found that preview control for each conveyer was effective, and the method was successful in order for the conveyers to follow up the target, the pattern roller speed, even if the conveyer characteristics had quite a few delays, shown in the previous paper. However, as the production line operation continues, the control characteristics such as delay and gain of each conveyer gradually change, the preview control does not follow up the target successfully. In this paper, a self-tuning method for the characteristic change is proposed and then it is shown in the actual line that the preview control achieves the tracking control over a long time in spite of the changes of the conveyer characteristics.