Time-varying FIR notch filter implementation using Raspberry Pi

Kocon, Slawomir; Piskorowski, Jacek

doi:10.1109/mmar.2015.7283866

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…In the discrete-time domain, LTV filters are also implemented by FIR [23] and IIR [24] systems. Although, reports are focused on Notch filtering as described in [5], [25].…”

Section: A Prior Workmentioning

confidence: 99%

A Variational Approach for Designing Infinite Impulse Response Filters With Time-Varying Parameters

Garza

Gómez

Lamare

et al. 2018

IEEE Trans. Circuits Syst. I

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Filter design with short transient state is a problem encountered in many fields of circuits, systems and signal processing. In this paper a novel low-pass filter design technique with time-varying parameters is introduced in order to minimize the rise-time parameter. Through the use of calculus of variations a method is developed to obtain the optimal closed-form expression for adjusting the parameters. In this context, two cases are addressed. The ideal case in which infinite bandwidth is required and a solution of finite bandwidth. The latter is obtained by means of a proper constraint formulation in the frequency domain. The proposed filter achieves the shortest rise-time and allows better preservation of the edge shape in comparison with other existing filtering methods. The analysis, synthesis and performance of the proposed system is discussed and illustrated with the aid of simulations.Index Terms-Filter design, rise-time, time-varying parameters, calculus of variations.

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“…In the discrete-time domain, LTV filters are also implemented by FIR [23] and IIR [24] systems. Although, reports are focused on Notch filtering as described in [5], [25].…”

Section: A Prior Workmentioning

confidence: 99%

A Variational Approach for Designing Infinite Impulse Response Filters With Time-Varying Parameters

Garza

Gómez

Lamare

et al. 2018

IEEE Trans. Circuits Syst. I

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show abstract

“…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

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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.

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Time-varying FIR notch filter implementation using Raspberry Pi

Cited by 2 publications

References 15 publications

A Variational Approach for Designing Infinite Impulse Response Filters With Time-Varying Parameters

A Variational Approach for Designing Infinite Impulse Response Filters With Time-Varying Parameters

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

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