公开(公告)号：US20240004352A1

公开(公告)日：2024-01-04

申请号：US18103121

申请日：2023-01-30

Applicant: Taiyuan University of Science and Technology

Inventor： Ying HU ,  Xiaogang WANG ,  Peng HU

IPC: G05B11/42 ,  B21D1/02

CPC classification number: G05B11/42 ,  B21D1/02

Abstract: The invention provides a dynamic proportional-integral-derivative (PID) method for plate straightening based on changes in yield strength. The method includes the steps of determining yield strength of a plate at an initial temperature; calculating a predicted straightening force of each straightening roll based on the yield strength; obtaining a measured straightening force of each straightening roll; determining yield strength errors Δσfront, Δσmiddle, and Δσrear using a numerical approximation method; determining parameters of a PID controller based on the yield strength errors Δσfront, Δσmiddle, and Δσrear; calculating a target reduction of a corresponding straightening roll based on the yield strength error Δσmiddle and the yield strength at the initial temperature; and adjusting a measured reduction of the current straightening roll using the PID controller with the parameters determined based on the target reduction.