An Adaptive Control Approach to the Ring Geometry Control for Radial-Axial Ring Rolling Processes

Abstract

This paper considers the radial-axial ring rolling process control and treats the problem of controlling the pressure roll and conical roll motions which are critical to final dimensional accuracy of rolled products. Since the process dynamics reveals non-linear characteristics and parameter uncertainty, an adaptive controller design method is proposed for the pressure roll and conical roll motion control, taking into consideration the process dynamics variation. The effectiveness of the proposed controller has been verified by computer simulation. The simulation results show that the ring rolling process with this adaptive controller is insensitive to variation of process parameters and yields desirable dimensional accuracy of rolled ring products.