Two-Level Modeling Based Intelligent Integration Control for Time-Varying Forging Processes

Time-varying forging processes and uncertainties and sudden changes in the deformation force or driving force pose great challenges to high-quality forging. In this paper, a two-level modeling based intelligent integration control approach is proposed to meet this challenge. It considers multiple localized nonlinear dynamics caused by the nonlinearity and the sudden changes, and also avoids the large-amplitude vibrations and even instability in the transition region. It also integrates the advantages of the tracking control and the robust control. The tracking control is to guarantee the tracking performance of the smooth operation region, while the robust control is to guarantee the robust performance of the sudden change region. To guarantee the continuity and smoothness between the smooth operation region and the sudden change region, the integration control based on both the tracking control and the robust control is developed in the transition region. Through this intelligent integration, the continu...