Reconstruction of Impact Force on Curved Panel using Piezoelectric Sensors

Laš, Vladislav; Zemčík, Robert; Kroupa, Tomáš; Bartošek, Jan

doi:10.1016/j.proeng.2012.09.527

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…As mentioned previously, deconvolution results can be unstable [10,19] as the scaling factors of the transfer function may vary largely. It is important that the frequency components are sampled with enough resolution to prevent scaling up the wrong component, resulting in noise or reconstruction errors.…”

Section: Reconstruction Of Impact Force Profiles Under Simulated Envi...mentioning

confidence: 98%

“…It is predicted that impact damage initiates at a specific threshold force [1], thus one of the main interests of impact monitoring systems is to estimate the impact force to determine the severity of the impact (estimate possibility of damage) [5,6,[8][9][10]. Many methods have been developed using passive lamb wave measurements (lamb wave source is the impact event and not active actuation from a transducer) from sensors at discrete points to reconstruct the impact force profile [5,6,[8][9][10][11][12][13]. Analytical solutions to such inverse problems exist but may be impractical to apply for complex structures [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…A popular alternative approach is to find the function which maps the recorded lamb wave response directly onto the impact force for a specific location [5,[8][9][10][11]16]. This way the actual geometric complexities of the structure can be disregarded, although there is now a requirement to store characteristic functions of each location [8,17].…”

Section: Introductionmentioning

confidence: 99%

“…These methods allow reconstruction of any form of impact profile using the transfer function obtained from a single impact force and lamb wave pair and are thus able to accommodate the many variations in possible impact cases. However, they can be unstable especially for noisy signals [6,7] and many regularisation methods have been developed to give more robust results [6,7,10,19]. Additionally, these methods may require large amounts of storage for transfer functions of multiple locations.…”

Section: Introductionmentioning

confidence: 99%

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A novel method for impact force estimation in composite plates under simulated environmental and operational conditions

Seno

Aliabadi

2020

Smart Mater. Struct.

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During its lifetime, an aircraft structure is subjected to various impacts from various sources such as tool drops, hail, ground service equipment, etc. In modern composite structures, these impacts have a significant chance of generating barely visible damage (BVID) which may lead to catastrophic failure of a structure if left undetected to grow. However, BVID is difficult to detect during routine visual inspection without specialised non-destructive inspection and thus there is large interest in developing monitoring systems for estimating the location and severity of impact events. Currently, most systems and methods have been developed for controlled lab conditions and do not consider the wide range of impact parameters in real life operation (environmental conditions, vibration, impactor stiffness, angle, etc) which may severely compromise the accuracy of these methods. In this study we have explored two methods for maximum impact force estimation, deconvolution and a novel gradient method, for the purpose of reliable severity assessment in composite aircraft structures under simulated environmental and operational conditions. It is shown that both methods allow accurate and robust estimation of the maximum impact force from various cases of impacts (variation of impact energy, mass, stiffness, angle, temperature, source) using minimum initial data from a single impact case. From further testing it is demonstrated that the gradient method is robust towards the effects of impact localisation errors and noise. The gradient method also has much less computational and storage requirements and is thus more feasible to integrate with current data acquisition systems being developed for structural health monitoring. Thus, we conclude that the proposed gradient method is suitable for impact force monitoring and severity assessment in composite aircraft structures in the simulated environmental and operational conditions.

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Section: Reconstruction Of Impact Force Profiles Under Simulated Envi...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel method for impact force estimation in composite plates under simulated environmental and operational conditions

Seno

Aliabadi

2020

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…They are generally less computationally effective comparing to the TOA techniques. But, with some special considerations, their computation speed can be in the same order of magnitude as TOA methods [15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%