A novel method of multiple adaptive notch filtering for flexible missile vibration suppression
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 9 July 2020
Issue publication date: 21 August 2020
Abstract
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.
Keywords
Acknowledgements
This research was supported under the National Natural Science Foundation of China (nO. 11372080), Harbin Youth Innovation Talent Fund (no. 2014RFQXJ121) and China Scholarship Council (NO. 201606685036).
Citation
Chen, G., Liu, S., Tang, Z., Xu, J. and Wang, W. (2020), "A novel method of multiple adaptive notch filtering for flexible missile vibration suppression", Aircraft Engineering and Aerospace Technology, Vol. 92 No. 8, pp. 1149-1157. https://doi.org/10.1108/AEAT-03-2020-0047
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited