An Impact Location Algorithm for Spacecraft Stiffened Structure Based on Posterior Possibility Correlation

Qi, Lei; Zeng, Zhoumo; Sun, Lei; Rui, Xiaobo; Fan, Fan; Yue, Guixuan; Zhao, Yating; Feng, Hao

doi:10.3390/s20020368

Cited by 15 publications

(5 citation statements)

References 21 publications

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“…ese waves can be categorized into longitudinal waves, transverse waves, Rayleigh waves, A0 Lamb waves, and others, and can be captured by various sensors on the surface of the structure. As longitudinal, transverse, and Rayleigh waves have small amplitudes compared to A0 Lamb waves, many studies utilize the properties of A0 Lamb waves for impact localization [29,30]. Most of the materials used in the construction of large equipment, such as nuclear power plants and ships, are steel.…”

Section: Error-index-based Impact Localization Algorithmmentioning

confidence: 99%

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Peng

Cui

Huang

et al. 2022

Shock and Vibration

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Flat plates and cylindrical shells are commonly used in large equipment. To locate the low-velocity impact points in these structures, this study proposes an error-index-based algorithm for impact localization. The time of arrival of an impact-generated A0 Lamb waves was first estimated based on the energy of the signal. Equations for calculating the error indices were proposed for flat-plate and cylindrical shell structures, and the probability distribution functions of the impact points are constructed for visual localization. The impact test results on a flat plate and cylindrical shell indicated that, compared to the Morlet wavelet method, the proposed algorithm improved the mean relative error of impact point localization on the flat plate by 0.22%, 15.64%, and 15.26% under three different noise conditions, respectively (i.e., no noise, and SNR = 5 and 0 dB). For the cylindrical shell, the mean relative error of impact localization improved by 1.8%, 3.97%, and 28.12% under the three conditions, respectively. The results indicated that the proposed localization algorithm can accurately locate the impact points on a flat plate and cylindrical shell, even under strong background noise conditions, providing a reference for future research on locating low-velocity impact points in large equipment.

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Section: Error-index-based Impact Localization Algorithmmentioning

confidence: 99%

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Peng

Cui

Huang

et al. 2022

Shock and Vibration

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“…Wang et al [ 16 ] proposed an Adaptive Energy Compensated Threshold Filtering (AECTF) method based on acoustic emission, which can achieve large-scale, fast, and accurate localization of impact sources in reinforced slabs with less resource consumption. Qi et al [ 17 ] proposed an algorithm for impact localization of reinforced structures based on posterior probability correlation, which combines the Gaussian correlation likelihood weighting method and the Bayesian posterior probability method to further optimize the localization results. Baxter et al [ 18 ] proposed a delta-T mapping method for the problem of difficult localization of acoustic sources on complex structures by dividing a grid in the relevant region and performing acoustic emission experiments at the grid points to create a training library for new acoustic signal localization.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Source Localization in CFRP Composite Plate Based on Wave Velocity-Direction Function Fitting

Feng

Rui

et al. 2023

Sensors

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Composite materials are widely used, but they are often subjected to impacts from foreign objects, causing structural damage. To ensure the safety of use, it is necessary to locate the impact point. This paper investigates impact sensing and localization technology for composite plates and proposes a method of acoustic source localization for CFRP composite plates based on wave velocity-direction function fitting. This method divides the grid of composite plates, constructs the theoretical time difference matrix of the grid points, and compares it with the actual time difference to form an error matching matrix to localize the impact source. In this paper, finite element simulation combined with a lead-break experiment is used to explore the wave velocity-angle function relationship of Lamb waves in composite materials. The simulation experiment is used to verify the feasibility of the localization method, and the lead-break experimental system is built to locate the actual impact source. The results show that the acoustic emission time-difference approximation method can effectively solve the problem of impact source localization in composite structures, and the average localization error is 1.44 cm and the maximum localization error is 3.35 cm in 49 experimental points with good stability and accuracy.

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“…Zhang et al compensated for the frequency dispersion problem in the plate structure by calculating the propagation phase velocity of the leakage signal and the spatiotemporal matrix of the leakage signal and realizing the localization of the continuous gas leakage source in the plate structure [23]. Based on the L-shaped array, Qi Lei et al proposed a frequency-weighted matrix beamforming algorithm, which reduced the influence of the frequency dispersion phenomenon in the plate structure and realized the localization of leakage signals in metal-reinforced plates [24]. However, the above method is mainly aimed at the source localization of metal structures, and the number of sensors is also required.…”

Section: Introductionmentioning

confidence: 99%

Leakage Source Localization Method for Aerospace Composite Structures Based on U-Array Wave Velocity-Compensated Beamforming

Qi,

Xu,

Sun

et al. 2023

Sensors

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Composite materials have been widely used in spacecraft structures. Due to the harsh environment in space, gas leakage will occur in the structure, so it is necessary to locate the leakage position in time. In this paper, a beamforming localization method based on a U-shaped sensor array is studied. The array can be divided into two subarrays, which can orientate the direction of leakage sources, respectively. To solve the problem of uneven wave velocity caused by the anisotropy of composite materials, this method modifies the relationship between wave velocity and direction and combines it with the dispersion curve to select a filtering frequency band to reduce the influence of dispersion. The experiment simulates vacuum leakage by pumping holes with a diameter of 3 mm with a vacuum pump. The results show that the U-shaped array beamforming algorithm proposed in this paper can obtain a positioning error of 2.21 cm, which provides a new idea for the structural health detection of spacecraft.

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An Impact Location Algorithm for Spacecraft Stiffened Structure Based on Posterior Possibility Correlation

Cited by 15 publications

References 21 publications

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Acoustic Source Localization in CFRP Composite Plate Based on Wave Velocity-Direction Function Fitting

Leakage Source Localization Method for Aerospace Composite Structures Based on U-Array Wave Velocity-Compensated Beamforming

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