基于屏蔽技术的经验模式分解改进方法

doi:10.3969/j.issn.1000-1158.2017.02.21

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Abstract Empirical mode decomposition(EMD) has superior adaptability as to localize the non-stationary and non-linear signals at different time scales correctly. But there is modal aliasing phenomenon when the frequencies of signal consisting components are similar to each other. In order to solve the problem above, shielding technology is introduced to optimize traditional EMD. A shielding signal with certain frequency is added to the original signal to exclude low frequency components from in the intrinsic mode function(IMF) where high-frequency component existed, while the shielding signal itself eliminated the influence on the IMF by acquiring average after adding or subtracting decomposition twice. Simulation and practical application have proved that this improved method can overcome aliasing modes phenomenon effectively, providing a new way to improve the EMD.

Key words： metrology EMD shielding technology intrinsic mode function power quality

Received: 13 January 2015 Published: 28 February 2017

PACS:

TB971

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	Articles by authors
	ZHANG Shu-qing
	SHI Rong-yan
	MA Chun-li
	DONG Guo-xin
	DONG Yu-lan
	LI Sha-sha
	JIANG Wan-lu

Cite this article:

ZHANG Shu-qing,SHI Rong-yan,MA Chun-li, et al. An Improved Empirical Mode Decomposition Method Based on Shielding Technology[J]. Acta Metrologica Sinica, 2017, 38(2): 220-224.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2017.02.21 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2017/V38/I2/220

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