Development of an electromechanical admittance approach for application in the vibration control of intelligent structures

Providakis, C. P.; Kontoni, D.P.N.; Voutetaki, Maristella E.

doi:10.1088/0964-1726/16/2/005

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…These devices have been extensively presented in various experimental programs by [20][21][22]26,27], proving their efficacy in detecting and evaluating damage severity in RC and FRC structural members. The theoretical components and additional information about the proposed SHM system can be found in [28,29].…”

Section: Shm Technique and Pzt Transducer Configurationmentioning

confidence: 99%

Electro-Mechanical Impedance-Based Structural Health Monitoring of Fiber-Reinforced Concrete Specimens under Four-Point Repeated Loading

Naoum,

Chalioris,

Karayannis

et al. 2023

CivilEng

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Fiber Reinforced Concrete (FRC) has shown significant promise in enhancing the safety and reliability of civil infrastructures. Structural Health Monitoring (SHM) has recently become essential due to the increasing demand for the safety and sustainability of civil infrastructures. Thus, SHM provides critical benefits for future research to develop more advanced monitoring systems that effectively detect and diagnose the damage in FRC structures. This study investigates the potential of an Electro-Mechanical Impedance (EMI) based SHM system for detecting cracks in FRC prisms subjected to four-point repeated loading. For the needs of this research, an experimental investigation of three FRC specimens with the dimensions 150 × 150 × 450 (mm) were subjected to three different loading levels where no visual cracks formed on their surface. Next, prisms were subjected to reloading until they depleted their load-carrying capacity, resulting in pure bending fracture at the mid-span. A network of nine cement paste coated Piezoelectric lead Zirconate Titanate (PZT) transducers have been epoxy bonded to the surface of the FRC prisms, and their frequency signal measurements were utilized for quantitative damage assessment. The observed changes in the frequency response of each PZT sensor are evaluated as solid indications of potential damage presence, and the increasing trend connotes the severity of the damage. The well-known conventional static metric of the Root Mean Square Deviation (RMSD) was successfully used to quantify and evaluate the cracking in FRC specimens while improving the efficiency and accuracy of damage detection. Similarly, the dynamic metric of a new statistical index called “moving Root Mean Square Deviation” (mRMSD) was satisfactorily used and compared to achieve and enhance accuracy in the damage evaluation process.

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Section: Shm Technique and Pzt Transducer Configurationmentioning

confidence: 99%

Electro-Mechanical Impedance-Based Structural Health Monitoring of Fiber-Reinforced Concrete Specimens under Four-Point Repeated Loading

Naoum,

Chalioris,

Karayannis

et al. 2023

CivilEng

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“…In addition, a method using piezoelectric transducers also provides objective inspection results [6][7][8][9][10][11][12][13][14]. A Piezoelectric lead Zirconate Titanate (PZT) transducer is characterized by generating a surface charge in response to an applied mechanical stress and undergoing mechanical deformation in response to an applied electric field.…”

Section: Introductionmentioning

confidence: 99%

“…This means that it works as both an actuator and a sensor. The detection of concrete defects by using the change in the response of PZT transducers attached to a structure has been studied both experimentally and by simulation [6][7][8]11]. In recent years, small PZT transducers which can be used for continuous inspection wirelessly have been developed [12,13].…”

Section: Introductionmentioning

confidence: 99%

Noncontact detection of concrete flaws by neural network classification of laser doppler vibrometer signals

2020

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This study aimed to develop a non-contact and high-speed damage detection technology for use on concrete structures. A laser Doppler vibrometer was used to obtain the vibrations of a concrete structure at a high signal-to-noise ratio. The observed vibration data were transformed into frequency spectra by Fourier transform. Using the simulation by the finite element method, it was predicted that the characteristic spectrum appeared in the low frequency region for the cracked part. However, the experimental results did not show such a difference clearly. In contrast, in the high-frequency region of the experimental data, a spectrum peculiar to the cracked part tended to appear. Nonetheless, the difference was so small that it was often buried by variations in hammering strength. Therefore, it was difficult to manually determine the signal of the cracked part. Machine learning using a convolutional neural network was carried out in order to judge the location and dimensions of a cracked part with high accuracy. As a result, cracks in the concrete were detected with a high accuracy of more than 90%.

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“…Since then, the EMI based SHM method has been widely applied to various engineering structures, including aerospace [11, 12], civil [13–21] and mechanical [22, 23] structures. The EMI method has also been applied for vibration control [24]. …”

Section: Introductionmentioning

confidence: 99%

Effect of External Vibration on PZT Impedance Signature

Yang

Miao

2008

Sensors

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Piezoelectric ceramic Lead Zirconate Titanate (PZT) transducers, working on the principle of electromechanical impedance (EMI), are increasingly applied for structural health monitoring (SHM) in aerospace, civil and mechanical engineering. The PZT transducers are usually surface bonded to or embedded in a structure and subjected to actuation so as to interrogate the structure at the desired frequency range. The interrogation results in the electromechanical admittance (inverse of EMI) signatures which can be used to estimate the structural health or integrity according to the changes of the signatures. In the existing EMI method, the monitored structure is only excited by the PZT transducers for the interrogating of EMI signature, while the vibration of the structure caused by the external excitations other than the PZT actuation is not considered. However, many structures work under vibrations in practice. To monitor such structures, issues related to the effects of vibration on the EMI signature need to be addressed because these effects may lead to misinterpretation of the structural health. This paper develops an EMI model for beam structures, which takes into account the effect of beam vibration caused by the external excitations. An experimental study is carried out to verify the theoretical model. A lab size specimen with different external excitations is tested and the effect of vibration on EMI signature is discussed.

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Development of an electromechanical admittance approach for application in the vibration control of intelligent structures

Cited by 5 publications

References 15 publications

Electro-Mechanical Impedance-Based Structural Health Monitoring of Fiber-Reinforced Concrete Specimens under Four-Point Repeated Loading

Electro-Mechanical Impedance-Based Structural Health Monitoring of Fiber-Reinforced Concrete Specimens under Four-Point Repeated Loading

Noncontact detection of concrete flaws by neural network classification of laser doppler vibrometer signals

Effect of External Vibration on PZT Impedance Signature

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