Estimated force based velocity synchronization for fly touch control in hot rolling process

In the hot rolling process, scratches are caused by immense friction between the rollers and the steel plate, and this defect reduces the quality of steelworks. To solve this problem, a flying touch method was proposed, which can control the gap between rollers for reducing scratches in hot rolling process. In a flying touch method, it is important that the gap between the rolling rolls can be control precisely and the velocity of rolling rolls can be synchronize to minimize the friction between steel plate and rolling rolls. Therefore, this paper addresses the velocity synchronize control for fly touch method. To reduce friction between steel plate and rolling rolls, this study estimates load torque of rolling rolls using torque estimation method based on SPO and control the velocity of rolling rolls according to estimated load torque. To confirm the performance of the estimated Force based velocity synchronize control, experimental evaluation is performed using down scaled simulator designed in previous study.