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| AGC System With Adaptive Threshold Method of Wavelet Transform |
| LI Yong,WANG Jun,HU Xianlei,LIU Xianghua |
| State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China |
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Abstract To solve some problems of conventional GMAGC system, a new AGC system based on adaptive threshold method of wavelet transform was developed with characteristic of time domain and frequency domain localization of multiscale wavelet transform analysis. The new system can selfadaptively, rationally confirm the number and thresholds of decomposed layers of wavelet, selfadaptively extract the change in rolling force for GMAGC adjustment, and selfadaptively identify the signals of roll eccentricity to accurately compensate roll eccentricity. This system has the properties of selfadaption, strong robustness, simple algorithm and high control accuracy. Experiments show that the new system greatly improves the thickness accuracy of strip and is worthy of promotion.
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Received: 01 January 1900
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2007, Vol. 42 
