Abstract:Abstract: Beat wave probably appears in vibration signal when unbalance is small. An estimation of beat frequency period and extraction of unbalance using sine approximation method is proposed in this paper. Period of beat frequency is estimated based on frequency composition of FFT result. Then, sine approximation method is used in extraction of unbalance amplitude and phase based on vibration data in a whole beat period. Simulation and experiments shows that this method solves unsteadiness of measuring result when unbalance is small, so the measurement precision is improved.
李传江;费敏锐;张自强. 高精度动平衡测量中不平衡信号提取方法研究[J]. , 2012, 31(14): 124-127.
li chuan-jiang;fei min-rui;zhang zi-qiang. Research of Extraction Method for Unbalance Signal in High Precision Dynamic Balancing Measurement. , 2012, 31(14): 124-127.