Improved filter banks for time-varying power harmonic decomposition

Fabri, Diego F.; Martins, Carlos H. N.; Duque, Carlos A.; Silveira, Paulo M.; Ribeiro, Paulo F.

doi:10.1109/pes.2011.6039112

Cited by 5 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The methods of frequency estimation are mainly divided into two categories: time-domain method and frequency domain method. Most of the former one (Cunningham et al , 1967; Fabri et al , 2011; Piskorowski, 2012; Tan et al , 2012; Kocon et al , 2013; Kocon et al , 2014; Shen et al , 2014; Kocon et al , 2015) need to identify more parameters, and it is difficult to obtain satisfactory results in both identification accuracy and calculation speed. The basic methods for the frequency domain are discrete Fourier transform (DFT) and its extension, i.e.…”

Section: Introductionmentioning

confidence: 99%

A novel method of multiple adaptive notch filtering for flexible missile vibration suppression

Chen

Liu

Tang

et al. 2020

AEAT

View full text Add to dashboard Cite

Purpose The modern missile has low uncertain and wide range vibration frequency. The conventional notch filter with the fixed notch frequency is less effective than that of the adaptive notch filter (ANF) in vibration suppression for the time-varying vibration frequency. Design/methodology/approach To overcome the drawback, a novel method is based on frequency estimators made by interpolation of three discrete Fourier transform (DFT) spectral lines. The modified frequency estimators based on the interpolation of three DFT spectral lines are presented to identify and track the vibration frequency. Then the notch frequencies of multiple ANFs are real-timely tuned according to estimators. Findings Finally, taking the second-order flexible missile as an example, the performance of the proposed method is verified. The verified simulation results show that multiple ANFs are effective in vibration suppression. Practical implications Cascading multiple ANFs to achieve multi-order vibration suppression is more efficient and feasible than conventional fixed-parameter notch filtering. Originality/value The frequency estimation method based on three DFT spectral lines proposed in this paper can effectively identify and track signals in the noise environment. Compared with conventional methods, the method pretended in this paper has high identification accuracy and a stronger ability to track signals. It can meet the fast frequency identification requirements of the actual flexible missile.