Abstract: Adaptive interaction algorithm, whose advantage is easy to implement, can perform gradient descent of control parameters without any knowledge of plant. Based on adaptive interaction theory and classical PID controlling theory, an adaptive interaction PID controller is developed. The good performance of adaptive interaction PID is verified by the application of hydraulic edger screwdown system in Baosteel 2050 rough mill. The results show that the adaptive interaction PID controller achieves better performance than the classic one, especially, in the circumstance of foreign disturbance and working condition variation.

Key words: Adaptive interaction theory, Hot rolling, PID controller Hydraulic servo system