Nearfield acoustical holography – a Wigner function approach

Ramapriya, Deepthee Madenoor; Gradoni, Gabriele; Creagh, Stephen C.; Tanner, Gregor; Moers, Elise; Arteaga, Inés López

doi:10.1016/j.jsv.2020.115593

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…In the paper we see that the source function in the transmitting domain and the resulting wave in the receiving domain are expanded using complete sets of basis functions which we have adopted for surfaces in this paper. However, we do not address the issue of channel capacity maximization here as we mainly focus on modelling of wave propagation within an enclosure by a statistical model which is an extension of our previous work on wave propagation in freespace [5] , [6] , [7] , [8] , [9] .…”

Section: Introductionmentioning

confidence: 99%

Wigner distribution function approach to analyze MIMO communication within a waveguide

Ramapriya¹,

Kaliprasad²,

C³

2023

Heliyon

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Section: Introductionmentioning

confidence: 99%

Wigner distribution function approach to analyze MIMO communication within a waveguide

Ramapriya¹,

Kaliprasad²,

C³

2023

Heliyon

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“…In spite of STFT, WVD is the quadratic transform with an optimal resolution and instantaneous power density spectrum in both considered domains [ 57 ]. Due to these properties, WVD found wide applicability primarily in the problems of technical diagnostics of rotary machinery and their condition monitoring [ 56 , 57 , 58 , 59 , 60 ], and in detecting defects in various applications [ 61 , 62 , 63 ]. To the best of the author’s knowledge, there were only several applications of WVD to the structural damage identification problems reported to date.…”

Section: Introductionmentioning

confidence: 99%

Damage Identification and Quantification in Beams Using Wigner-Ville Distribution

Katunin

2020

Sensors

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The paper presents the novel method of damage identification and quantification in beams using the Wigner-Ville distribution (WVD). The presented non-parametric method is characterized by high sensitivity to a local stiffness decrease due to the presence of damage, comparable with the sensitivity of the wavelet-based approaches, however the lack of selection of the parameters of the algorithm, like wavelet type and its order, and the possibility of reduction of the boundary effect make this method advantageous with respect to the mentioned wavelet-based approaches. Moreover, the direct relation between the energy density resulting from the application of WVD to modal rotations make it possible to quantify damage in terms of its width and depth. The results obtained for the numerical modal rotations of a beam presented in this paper, simulating the results of non-destructive testing achievable with the shearography non-destructive testing method, confirm high accuracy in localization of a damage as well as quantification of its dimensions. It was shown that the WVD-based method is suitable for detection of damage represented by the stiffness decrease of 1% and can be identified and quantified with a high precision. The presented results of quantification allowed extracting information on damage width and depth.

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A review of the Wigner distribution function approach to analyse electromagnetic field

Ramapriya¹,

Barman

Appaiah³

et al. 2021

Journal of Electromagnetic Waves and Applications

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Nearfield acoustical holography – a Wigner function approach

Cited by 3 publications

References 19 publications

Wigner distribution function approach to analyze MIMO communication within a waveguide

Wigner distribution function approach to analyze MIMO communication within a waveguide

Damage Identification and Quantification in Beams Using Wigner-Ville Distribution

A review of the Wigner distribution function approach to analyse electromagnetic field

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