Short Stroke Control with Gaussian Curve and PSO Algorithm in Plate Rolling Process

Jing-Guo Ding¹, Li-Li Qu², Xian-Lei Hu¹, Xiang-Hua Liu¹

(1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004 , China;2. Shenyang Blower Ventilation Co.,Ltd., Shenyang 110041, China)



Abstract:

The precision width control is vital for product quality and production economy in plate width control process, so short stroke control method was used in plate rolling by opening or closing edger gap so as to avoid head end necking. Head end necking on different broadening ratio was analyzed, and sections of different elongations at edger rolling was calculated; based on the law of volume constancy, the adjustment functions were described by parabolic functions. Control curves were developed with three Gaussian curves by means of additional combining; SSC control curve was changed with different weights of those curves, w₁ effect one-third of SSC length, w₂ effect two-third of SSC length, w₃ effect all three parts of SSC length. In order to adjust the amount of weights for precise quantification, PSO algorithm was used to build sufficiency function so as to obtain best rectangular degree by global optimization. Practical applications showed that the method proposed is available to improve the product rolling yields by 1.0£¥-2.0£¥ and worthy to apply to plate rolling.

Key words:  plate mill  short stroke control  gaussian curve  PSO  rolling yields

DOI£º10.11916/j.issn.1005-9113.2013.04.015

Clc Number:TG335.5

Fund: