A Unified Full-Field Deformation Measurement Method for Beam-Like Structure

Chen, Kangyu; He, Dahang; Zhao, Yong; Bao, Hong; Du, Jingli

doi:10.1109/tim.2022.3144215

Cited by 14 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the idea of an inverse finite element, Gherlone et al [ 17 ] developed an inverse beam element applicable to shear, bending, and torsional deformation, based on the theory of spatial Timoshenko beam deformation. Chen et al [ 18 , 19 ] used the homogenized theory to improve the traditional iFEM, which can expand the application scope of inverse beam elements in engineering. Savino et al [ 20 ] developed a method for reconstructing the displacement field of a circular arch structure based on the shape functions of two-node beam elements, and the simulation results demonstrated better reconstruction performance than traditional finite element analysis methods.…”

Section: Introductionmentioning

confidence: 99%

Discontinuous Deformation Monitoring of Smart Aerospace Structures Based on Hybrid Reconstruction Strategy and Fiber Bragg Grating

Chen,

Fan,

Bao

2024

Sensors

Self Cite

View full text Add to dashboard Cite

A hybrid enhanced inverse finite element method (E-iFEM) is proposed for real-time intelligent sensing of discontinuous aerospace structures. The method can improve the flight performance of intelligent aircrafts by feeding back the structural shape information to the control system. Initially, the presented algorithm combines rigid kinematics with the classical iFEM to discretize the aerospace structures into elastic parts and rigid parts, which will effectively overcome structural complexity due to fluctuating bending stiffness and a special aerodynamic section. Subsequently, the rigid parts provide geometric constraints for the iFEM in the shape reconstruction method. Meanwhile, utilizing the Fiber Bragg grating (FBG) strain sensor to obtain real-time strain information ensures lightweight and anti-interference of the monitoring system. Next, the strain data and the geometric constraints are processed by the iFEM for monitoring the full-field elastic deformation of the aerospace structures. The whole procedure can be interpreted as a piecewise sensing technology. Overall, the effectiveness and reliability of the proposed method are validated by employing a comprehensive numerical simulation and experiment.

show abstract

Section: Introductionmentioning

confidence: 99%

Discontinuous Deformation Monitoring of Smart Aerospace Structures Based on Hybrid Reconstruction Strategy and Fiber Bragg Grating

Chen,

Fan,

Bao

2024

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bao et al [ 19 ] developed the single variable iFEM model to reduce the number of strain sensors required in multi-node load. Chen et al [ 20 ] established a unified reconstruction method for the beam-like structure based on the framework of iFEM, which can reduce the structure identification error by introducing some generalized quantities. Shang et al [ 21 ] proposed the inverse-plate quadrilateral area coordinates method to replace the Jacobian matrix, such that the error caused by numerical integration can be avoided.…”

Section: Introductionmentioning

confidence: 99%

An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating

Bao

2023

Micromachines

Self Cite

View full text Add to dashboard Cite

The position and altitude of a sub-reflector have an important influence on the pointing accuracy of a radio telescope. With the increase of the antenna aperture, the stiffness of the support structure for the sub-reflector decreases. This causes deformation of the support structure when environmental loads, such as gravity, temperature, and wind load, are applied to the sub-reflector, which will seriously influence antenna pointing accuracy. This paper proposes an online measurement and calibration method for assessing the deformation of the sub-reflector support structure based on the Fiber Bragg Grating (FBG) sensors. Firstly, a reconstruction model between the strain measurements and the deformation displacements of a sub-reflector support structure is established based on the inverse finite element method (iFEM). In addition, a temperature-compensating device with an FBG sensor is designed to eliminate the effects of temperature variations on strain measurements. Considering the lack of the trained original correction, a non-uniform rational B spline (NURBS) curve is built to extend the sample data set. Next, a self-structuring fuzzy network (SSFN) is designed for calibrating the reconstruction model, which can further improve the displacement reconstruction accuracy of the support structure. Finally, a full-day experiment was carried out using a sub-reflector support model to verify the effectiveness of the proposed method.

show abstract

“…The displacement reconstruction method [15,16] is a method of indirectly deriving displacement with mathematical relationships using physical quantities related to displacement. Commonly used physical quantities include strain [17], acceleration [18], and inclination angle [19]. Bang et al [20] deployed an FBG sensor array on a 70 m wind power tower and derived the dynamic displacement of the tower top using strain time history.…”

Section: Introductionmentioning

confidence: 99%

Deformation Monitoring of Monopole Communication Towers Based on Multi-Source Data Fusion

Ji,

Ren,

et al. 2023

Buildings

View full text Add to dashboard Cite

Monopole communication towers play an irreplaceable role in modern communication systems. Because of its high flexibility, lateral loads control the deformation of a monopole communication tower. Dynamic displacement can be used to describe structural vibration characteristics and real-time deformation situations. Therefore, this article proposes a monopole communication tower deformation monitoring method based on multi-source data fusion using dynamic displacement as the evaluation indicator. This method calculates the strain displacement using the strain-mode superposition methodology. Then, the strain displacement and acceleration obtained are processed using Kalman filtering technology to reconstruct the real-time displacements of the monopole communication tower. The effectiveness of this method was verified using numerical simulations and model experiments, respectively. In addition, parametric analysis shows that this method is suitable for processing multi-rate data, has good noise resistance in strong noise environments, and can effectively reconstruct the displacement near the tower bottom. The results indicate that the method has favorable robustness and can accurately reconstruct low-frequency and high-frequency displacements of the monopole communication tower.

show abstract

A Unified Full-Field Deformation Measurement Method for Beam-Like Structure

Cited by 14 publications

References 29 publications

Discontinuous Deformation Monitoring of Smart Aerospace Structures Based on Hybrid Reconstruction Strategy and Fiber Bragg Grating

Discontinuous Deformation Monitoring of Smart Aerospace Structures Based on Hybrid Reconstruction Strategy and Fiber Bragg Grating

An Online Measurement and Calibration Method for a Radio Telescope Sub-Reflector Support Structure Using Fiber Bragg Grating

Deformation Monitoring of Monopole Communication Towers Based on Multi-Source Data Fusion

Contact Info

Product

Resources

About