Prediction of Impact Forces on an Aircraft Composite Wing

Park, Chan Yik; Kim, In-Gul

doi:10.1177/1045389x07083180

Cited by 15 publications

(4 citation statements)

References 8 publications

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“…To estimate the impact location, it is not necessary to go through a very time-consuming procedure by scanning and searching for the peak value of the reconstructed signal at every point in the selected time domain as studied by [12,13]. An adaptive two-step search algorithm is proposed to rapidly trace the impact location with high resolution.…”

Section: Impact Location and Shape Estimationmentioning

confidence: 99%

“…In addition, owing to the anisotropy of composites the wave velocity is directionally dependent [11]; the closed form formulated by Tobias is invalid. An optimization function has been proposed to estimate the impact location [12,13]. Recently several attempts have been made using wavelet transformation and wavelet decomposition to overcome these issues [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Then both the impact location and the loading time history can be identified by these functions in conjunction with signal processing algorithms using the impact response signals from sensors. These functions have been obtained from experiments [18,19], the finite element method (FEM) [12,13], or analytical solutions for infinite plates or simply supported boundary conditions [20,21]. Note that the latter two methods can be used to compute the functions conveniently, however, mechanical properties and boundary conditions of the complex structures may not be precisely known in practice.…”

Section: Introductionmentioning

confidence: 99%

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Impact source identification in finite isotropic plates using a time-reversal method: theoretical study

Chen

Fang

2010

Smart Mater. Struct.

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This paper aims to identify impact sources on plate-like structures based on the synthetic time-reversal (T-R) concept using an array of sensors. The impact source characteristics, namely, impact location and impact loading time history, are reconstructed using the invariance of time-reversal concept, reciprocal theory, and signal processing algorithms. Numerical verification for two finite isotropic plates under low and high velocity impacts is performed to demonstrate the versatility of the synthetic T-R method for impact source identification. The results show that the impact location and time history of the impact force with various shapes and frequency bands can be readily obtained with only four sensors distributed around the impact location. The effects of time duration and the inaccuracy in the estimated impact location on the accuracy of the time history of the impact force using the T-R method are investigated. Since the T-R technique retraces all the multi-paths of reflected waves from the geometrical boundaries back to the impact location, it is well suited for quantifying the impact characteristics for complex structures. In addition, this method is robust against noise and it is suggested that a small number of sensors is sufficient to quantify the impact source characteristics through simple computation; thus it holds promise for the development of passive structural health monitoring (SHM) systems for impact monitoring in near real-time.

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Section: Impact Location and Shape Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact source identification in finite isotropic plates using a time-reversal method: theoretical study

Chen

Fang

2010

Smart Mater. Struct.

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“…A system which has the ability to locate the impact event without such drawbacks would make the evaluation process more efficient. A variety of impact identification technologies have been reported in the literature [4][5][6][7][8][9] to detect the location of the impact event. A number of the technologies require the accurate and precise determination of the time of arrival of the signal excited by the events [10], while the large picking errors of the time of arrival make the estimated location inaccurate [11].…”

Section: Introductionmentioning

confidence: 99%

An innovative method for automatic determination of time of arrival for Lamb waves excited by impact events

Zhu

Parvasi

et al. 2017

Smart Mater. Struct.

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Lamb waves have great potential as a diagnostic tool in the application of structural health monitoring. Propagation properties of Lamb waves are affected by the state of the structure that the waves are traveling upon. Thus Lamb waves can carry information about the structure as they travel across a structure. However, the dispersive, multimodal and attenuation characteristics of Lamb waves make it difficult to determine the time of arrival of Lamb waves. To deal with these characteristics, an innovative method to automatically determine the time of arrival for impact-induced Lamb waves without human intervention is proposed in this paper. Lead zirconate titanate sensors mounted on the surface of an aluminum plate were used to measure the Lamb waves excited by an impact. The time of arrival was determined based on wavelet decomposition, Hilbert transform and statistics (Grubbs’ test and maximum likelihood estimation). Both of numerical analysis and physical measurements have verified the accuracy of this method for impacts on an aluminum plate.

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Impact load identification for composite structures using Bayesian regularization and unscented Kalman filter

Yan

Sun

Büyüköztürk

2016

Struct. Control Health Monit.

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In structural health monitoring of composite structures, one important task is to detect and identify the low-velocity impact events, which may cause invisible internal damages. This paper presents a novel approach for simultaneously identifying the impact location and reconstructing the impact force time history acting on a composite structure using dynamic measurements recorded by a sensor network. The proposed approach consists of two parts: (1) an inner loop to reconstruct the impact force time history and (2) an outer loop to search for the impact location. In the inner loop, a newly developed inverse analysis method with Bayesian inference regularization is employed to solve the ill-posed impact force reconstruction problem using a state-space model. In the outer loop, a nonlinear unscented Kalman filter (UKF) method is used to recursively estimate the impact location by minimizing the error between the measurements and the predicted responses. The newly proposed impact load identification approach is illustrated by numerical examples performed on a composite plate. Results have demonstrated the effectiveness and applicability of the proposed approach to impact load identification.

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Prediction of Impact Forces on an Aircraft Composite Wing

Cited by 15 publications

References 8 publications

Impact source identification in finite isotropic plates using a time-reversal method: theoretical study

Impact source identification in finite isotropic plates using a time-reversal method: theoretical study

An innovative method for automatic determination of time of arrival for Lamb waves excited by impact events

Impact load identification for composite structures using Bayesian regularization and unscented Kalman filter

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