Synchronous speed control strategy for cold plate leveler

Abstract

In order to improve the quality of surface and subsurface of steel plate, hot plate leveler and cold plate leveler are arranged after main roll mill. This paper mainly present the design, control and technology for main drive roller of Cold Plate Leveler (CPL), which has great function to satisfy complex and precise technology for steel production. A special 9 single-roller control strategy is indicated in the paper, realized by calculating computer model and monitoring data including General Sequence Control (GSC), General Function Control (GFC), Leveling Gap Control (LGC), Leveling Roll Entry (LRY), Leveling Roller Exit (LRX), Leveling Single Roller (LSR), Leveling Adjustment Mode (LAM), Bend-roller 4*4(B44), Leveling Exterior Control (LEC). Every drive roller of 9 rollers will be separately calculated and implemented by setting and feedback value of torque between steel plate and roller. In the last section of this paper, some experiment results are showed.

Control system of the film casting based on the fieldbus

“…In this system, the PLC is used as the controller.And the transducer, the three-phase AC asynchronous motor, the PID control algorithm are also used to constitute the control system to achieve the aim that all the parts maintain synchronous [19,20]. The basic scheme is shown in Fig.8.…”