NI Jin，WANG Hong-liang，LIU Xiang-qi，GU Zhan-hua

（School of Mechanical Engineering，Hangzhou Dianzi University，Hangzhou 310018，China）

Abstract：Aiming at the situation of material loss，reducing life of saw blade，lumber size accuracy and machining surface quality variation which is caused by the vibration of band saw blade，a band saw blade vibration suppression device basing on the main modes of vibration prediction was introduced. Multidimensional vibration in the horizontal，vertical and torsional direction in real- time was collected，and a prediction model of the predominant vibration mode which adopting a predominant vibration mode recognition algorithm based on the EMD screening method was established，and at last an electro-hydraulic damper shock absorber was controlled by PID

control method on the base of the prediction model and the real-time data. The results indicate that，the effect of suppressing chatter in the horizontal，vertical and torsional direction can reach 80%，66%，75%.

Key words：vibration reduction；main vibration mode prediction；multidimensional vibration