Study on Vibration Signal Marginal Spectrum of Paper-Transferring System in Printing Press Based on EMD
The precision of transferring paper is key factors to decide the print overprint accuracy, and vibration has an important impact on paper transferring accuracy. Empirical mode decomposition (EMD) can be used to extract the features of vibration test signal. According to the intrinsic mode function (IMF) by extracted, it is useful to analyze the dynamic characteristics of swing gripper arm on motion state. Due to the actual conditions of printing, the vibration signal of Paper-Transferring mechanism system is complex quasi periodic signals. Hilbert-Huang marginal spectrum that is based on empirical mode decomposition can solve the problem which is modals leakage by FFT calculated in frequency domain. Through the experimental research, the phase information of impact load at the moment of grippers opening or closing, which can be used for the optimization design of Paper-Transferring system and the improvement in the accuracy of swing gripper arm.
Liangchi Zhang, Chunliang Zhang and Tielin Shi
Y. M. Wang et al., "Study on Vibration Signal Marginal Spectrum of Paper-Transferring System in Printing Press Based on EMD", Advanced Materials Research, Vols. 139-141, pp. 2464-2468, 2010