Research on the separation of systematic error based on the improved EMD method

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (14) : 176-180.

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Research on the separation of systematic error based on the improved EMD method

YAO Gang，ZHAO Jian-jun，YAO Yue-ting，REN Xi

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Abstract

Systematic error has a complicated transformation regulation in measuring system. The separation of systematic error is one of the most important matters of researches on the measuring system. In order to break restrictions of traditional methods, an Improved Empirical Mode Decomposition (EMD) was used to the process of separating systematic error. Endpoints continuation based on the degree of wave similarity has been put forward to restrain end effect. Cumulative Percent Variance was regarded as one of the separation stopping criteria. The results of simulations and a real example imply that the improved EMD brings a good effect on the separation.

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Empirical Mode Decomposition / systematic error separation / end effect / degree of wave similarity / cumulative percent variance

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YAO Gang;ZHAO Jian-jun;YAO Yue-ting;REN Xi. Research on the separation of systematic error based on the improved EMD method[J]. Journal of Vibration and Shock, 2014, 33(14): 176-180