Trend analysis method for acoustic emission signals of TBM tool based on Improved CRITIC Method

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (6) : 197-202.

LI Hong-bo1,2，CHEN kui1,2，ZhOU Jian-jun1,2，ZHANG He-pei1,2，REN Ying-ying1,2

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Abstract

The TBM tool changes frequently and lacks effective method to evaluate the tool condition in underground construction.The acoustic emission technology is applicated to detect TBM tool.Based on TBM mode,and by acquiring acoustic emission signals of different tool wear.Researching single parameter and multi parameter acoustic emission influence hob wear trend and put a kind of improved CRITIC Method to evaluate hob wear. The disc cutter wear test showed that the improved CRITIC Method is more sensitive to the tool wear information.The new method is more efficient to evaluate and predicte tool wear，and can provide guidance for repairing and maintenance the cutting tool.

Key words

acoustic emission / CRITIC / feature fusion / TBM / condition assessment

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LI Hong-bo1,2，CHEN kui1,2，ZhOU Jian-jun1,2，ZHANG He-pei1,2，REN Ying-ying1,2. Trend analysis method for acoustic emission signals of TBM tool based on Improved CRITIC Method[J]. Journal of Vibration and Shock, 2016, 35(6): 197-202

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