Correlation Transformation and Its Application in Estimation of Window Ripple Period
In this paper,a new method for estimation of ripple period of window motor,the correlation transform method,is proposed.The output signal after correlation transformation has the same period as the input signal,and the initial phase of the fundamental wave and each harmonic of the output signal after correlation transformation is zero.Due to the in-phase superposition of harmonics,the peak sharpness and signal-to-noise ratio of the fundamental wave are significantly enhanced in the range of the fundamental peak point and neighborhood of the output signal after the correlation transformation.The accuracy and reliability of the signal period estimation in the output domain of the correlation transform can be greatly improved.In this paper,the excellent characteristics of correlation transformation are proved by theory,simulation and example,and the results are accurate.
万方数据
维普
