Abstract
Purpose - the proposed method is to remit or mitigate deterioration resulted from the influence of short data length to existing signal extracting methods.Design/methodology/approach - carefully to design the pre-filtering circuits to refrain most of the noise and disturbance, and remove the influence of operation speed of the concerned balancing machine. Based on the analysis on the spectral feature of the unbalance vibration signal, an pre-filtering circuits is designed, then the signal extension method based on AR prediction model are discussed and used to prolong sampled signal. Findings - With the extension method,sampled signal can be extended to required length to enhance the performance of refraining nearby frequency disturbance. The results of simulation and field experiments demonstrate the feasibility of the presented extension method.Practical implications - Improved measurment efficiency of balancing machine and provided a method to trade off between measurment accuracy and measurement efficiency. Originality/value - presented a way to improve extraction accuracy and frequency resolutoin with limited cycles of unbalance vibration signal.
Purpose - the proposed method is to remit or mitigate deterioration resulted from the influence of short data length to existing signal extracting methods.Design/methodology/approach - carefully to design the pre-filtering circuits to refrain most of the noise and disturbance, and remove the influence of operation speed of the concerned balancing machine. Based on the analysis on the spectral feature of the unbalance vibration signal, an pre-filtering circuits is designed, then the signal extension method based on AR prediction model are discussed and used to prolong sampled signal. Findings - With the extension method,sampled signal can be extended to required length to enhance the performance of refraining nearby frequency disturbance. The results of simulation and field experiments demonstrate the feasibility of the presented extension method.Practical implications - Improved measurment efficiency of balancing machine and provided a method to trade off between measurment accuracy and measurement efficiency. Originality/value - presented a way to improve extraction accuracy and frequency resolutoin with limited cycles of unbalance vibration signal.