Separation of the Piston-slap and Combustion Shock Vibration Components via MEEMD Method

PDF(2442 KB)

Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (6) : 109-113.

论文

Separation of the Piston-slap and Combustion Shock Vibration Components via MEEMD Method

Zheng Xu, Hao Zhi-yong, Lu Zhao-gang, Yang Ji

Author information +

History +

Abstract

A modified ensemble empirical mode decomposition (MEEMD) is proposed in this paper, and its basic principles are discussed. The numerical simulation shows that MEEMD is a better adaptive signal decomposed method, which not only restrains the disadvantage of mode mixing problem of the EMD method, but also overcomes the non-IMFs, mode splitting and noise residue problems. The MEEMD method is then used to analyze the vibration signal of the block of a diesel engine. The analysis achievements show that the mechanical shock component originating from piston-slap could be successfully separated from the combustion shock component, and the dominate vibration sources could be obtained.

Key words

Diesel engine / Vibration signal / MEEMD / Piston-slap / Combustion shock

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Zheng Xu;Hao Zhi-yong;Lu Zhao-gang;Yang Ji. Separation of the Piston-slap and Combustion Shock Vibration Components via MEEMD Method[J]. Journal of Vibration and Shock, 2012, 31(6): 109-113