Extraction of unbalance vibration signal of rotor based on least square method
Shihai Zhang · Machinery Design and Manufacture · 2012
Since unbalanced vibration is the main reason which makes the machine breakdown,it's necessary to extract the unbalanced vibration signal which has same frequency with the speed of principal axis from noise in order to realize accurate balance.Therefore,accurate extraction of unbalanced vibration signal is a prerequisite for rotor dynamic balancing.Based on the principle of least squares method,a mathematical model of extracting the unbalanced vibration signal has been built and an accurate method of unbalance vibration signal extraction has been presented.Based on the method,the unbalance vibration signal has been extracted successfully by Matlab simulation.Simulation analysis results show that the method can accurately extract the unbalance vibration information of amplitude and phase,which can be applied to rotor unbalance vibration monitoring and dynamic balancing and so on.