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

• 作 者: Jing-Guo Ding Li-Li Qu Xian-Lei Hu Xiang-Hua Liu
• 机 构: State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang Blower Ventilation C
• 出 处: Journal of Harbin Institute of Technology
• 发表日期: 2013年04期
• 关键词: plate mill short stroke control gaussian curve PSO rolling yields

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,w_1effect one-third of SSC length,w_2effect two-third of SSC length,w_3effect 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.

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, w_1effect one-third of SSC length, w_2effect two-third of SSC length, w_3effect 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 prod uct rolling yields by 1.0% -2.0% and worthy to apply to plate rolling.