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Extraction of Plant-wide Oscillations using Fast Multivariate Empirical Mode Decomposition ?

机译:使用快速多元经验模态分解提取全厂振荡

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This paper proposes a novel time-frequency method for plant-wide oscillation analysis based on the multivariate extension of standard empirical mode decomposition (EMD). The raised fast multivariate empirical mode decomposition (FMEMD) is generalized from EMD by solving an overdetermined system of linear equations. Due to its capability to analyze multiple channels data, FMEMD is especially suitable for characterizing plant-wide control loop oscillations. Unlike traditional methods, both the regularity of oscillations (in frequency domain) and evolution of local characteristics (in time scale) can be well captured via FMEMD. Validity of the raised approach is demonstrated on simulations as well as an industrial case.
机译:提出了一种基于标准经验模态分解(EMD)多元扩展的时频分析方法。通过求解超定线性方程组,从EMD推广了提出的快速多元经验模态分解(FMEMD)。由于具有分析多通道数据的能力,FMEMD特别适用于表征工厂范围内的控制回路振荡。与传统方法不同,可以通过FMEMD很好地捕获振荡的规律性(在频域中)和局部特征的演变(在时标中)。仿真和工业案例证明了所提方法的有效性。

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