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| Shape control dimensionality reduction efficiency inherited regulation method of cold rolling wide strip |
| SONG Lei1，SHEN Ming-gang1，YANG Li-po2，LIU Jun2,3，WANG Jun-sheng2,3，CHEN Xue-bo1 |
（1. Electronic and Information Engineering， University of Science and Technology Liaoning， Anshan 114021，Liaoning， China
2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling，Yanshan University， Qinhuangdao 066004， Hebei， China
3. Iron and Steel Academe of Ansteel Group， Anshan 114021， Liaoning， China） |
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Abstract Based on high-order Legendre polynomial function and regulation efficacy，the dimensionality reduction efficiency inherited regulation method and the two-loop comprehensive regulation control model are established. First，the l ocal shape information was described by the high-order curve，while the dimension of influence coefficient matrix and the computing amount of power function are reduced， typical shape deviations are synchronous eliminated by using traditional shape control means（tilting roll， roll bending and shifting）. Then，the secondary regulation of finely segmented cooling is carried out for remaining shape deviation， and to remove local wave defects and improve the production stability and shape quality. Examples show that when the order was covered by more than half of strip detection channel number，the fitted curve already contained all the local shape information. For relatively typical bad shape state（about 50 I），the remaining shape deviation was within 15 I after the first regulation，after the secondary regulation，the remaining shape deviation within 8 I，which showed the integrated control effect was ideal.
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Received: 04 March 2015
Published: 06 January 2016
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2016, Vol. 51 
