Aiming at the vibration parameter estimation with partial period waveform, a method based on partial period sinusoidal curve-fitting is presented, to realize the rapid measurement of ultra low frequency vibration parameters. Including amplitude, frequency, phase, and bias, etc.. For non-sinusoidal vibration, such as random vibration, damp vibration etc. on the assumption that local part is sinusoidal waves, by using sinusoidal curve-fitting with partial period and model parameter searching method, all the variety of amplitude, frequency, and bias via time are obtained. Through a group of experiments in both partial period vibration waves and non-sinusoidal waves, both the feasibility and correctness of the method in this paper are proved. It can be used to parameter measurement and analysis of partial period vibration, and also can be applied to the analysis of complex non-sinusoidal vibration waves.
LIANG Zhi-guo;SHAO Xin-hui.
The Vibration Parameters Evaluation Method Based on Partial Sinusoidal Curve-fitting[J]. Journal of Vibration and Shock, 2013, 32(18): 91-94
PDF(1026 KB)
