Sliding Mode Control of Piezoelectric Stack Actuators for Roll Gap Adjustment in a Cold Rolling Mill

2019 ◽  
Author(s):  
Matthias Wehr ◽  
Sven Stockert ◽  
Christina Ionescu ◽  
Dirk Abel ◽  
Gerhard Hirt
Keyword(s):  
Sliding Mode Control ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Sliding Mode ◽  
Cold Rolling Mill ◽  
Mode Control ◽  
Roll Gap

scholarly journals Multi-Objective Optimization of Intermediate Roll Profile for a 6-High Cold Rolling Mill

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 287 ◽  
Author(s):  
Xin Jin ◽  
Chang-sheng Li ◽  
Yu Wang ◽  
Xiao-gang Li ◽  
Tian Gu ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Contact Pressure ◽  
Rolling Mill ◽  
Coupling Model ◽  
Multi Objective Optimization ◽  
Cold Rolling Mill ◽  
Roll Profile ◽  
Multi Objective ◽  
Strip Flatness ◽  
Roll Gap

The multi-objective optimization of the SmartCrown intermediate roll profile for a cold rolling mill was proposed in this paper in order to improve the strip flatness quality. A coupling model of roll profile and strip flatness was established, and the roll gap profile, roll gap crown adjustment range, rolls contact pressure, and strip flatness under different intermediate roll profile parameters were calculated based on the coupling model. The results showed that the roll gap crown adjustment range and rolls contact pressure difference increased with increasing roll profile parameters. The roll profile parameters were multi-optimized based on the non-dominated sorting genetic algorithm II (NSGA-II). The minimum rolls contact pressure difference and maximum roll gap crown adjustment range were taken as the objective function of multi-objective optimization. The optimal roll profile parameters were applied to a six-high five stand tandem cold rolling mills, which improved the flatness quality of the DP780 steel strip.

Edge Drop Control Technology of 4-Hi Tandem Cold Rolling Mill on the Premise of Considering Roll Grinding Accuracy

2011 ◽  
Vol 291-294 ◽  
pp. 732-735 ◽  
Author(s):  
Guang Hui Yang ◽  
Jian Guo Cao ◽  
Jie Zhang ◽  
Xiao Qin Yin ◽  
Sheng Hui Jia ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
System Configuration ◽  
Backup Roll ◽  
Cold Rolling Mill ◽  
Tandem Cold Rolling ◽  
Strip Edge ◽  
Roll System ◽  
Roll Gap ◽  
Edge Drop

For gaining strip edge drop controllability and increasing roll grinding precision, the edge drop control work roll (EDW) was developed and designed in 1700 mm tandem cold rolling mill. During the rolling trial, the roll configuration between EDW and conventional backup roll didn’t match well because of the large fluctuation of strip edge drop, the lower shape control ability and non-uniform roll wearing, so the new roll configuration between EDW and varying contact backup roll (VCR) was proposed. After analyzing by finite element model, the result showed that the roll system configuration of VCR and EDW was better by 10.7% larger roll gap crown adjustable scope, 19.1% larger roll gap stiffness characteristics and 21.6% smaller pressure peak between rolls than before. The new roll system configuration has been applied to 1700 tandem cold rolling mill at WISCO after industrial testing.

Combined Sliding Mode Control with a Feedback Linearization for Speed Control of Induction Motor

2011 ◽  
Vol 7 (1) ◽  
pp. 19-24
Author(s):  
Aamir Hashim Obeid Ahmed ◽  
Martino O. Ajangnay ◽  
Shamboul A. Mohamed ◽  
Matthew W. Dunnigan
Keyword(s):  
Sliding Mode Control ◽  
Induction Motor ◽  
Feedback Linearization ◽  
Sliding Mode ◽  
Speed Control ◽  
Mode Control
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