Article
Engineering, Electrical & Electronic
Massimiliano Gabardi, Lorenzo Tozzetti, Stefano Faralli, Massimiliano Solazzi, David Benedetti, Samina Rajbhandari, Gianni Buttaro, Fabrizio Di Pasquale
Summary: Fiber Bragg grating (FBG) sensors written by femtosecond laser pulses in polyamide-coated low bending loss optical fibers are successfully embedded in carbon composite structures. These sensors are interrogated by a tunable laser and their response to temperature and strain variations is characterized. The results show good agreement with simulations, demonstrating the effectiveness of the embedding process for real-time accurate strain measurement.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Hui Wang, Chen Li, Lei Liang, Ke Jiang, Shu Dai, Huifeng Wu, Xiaoling Tong
Summary: This study derived the dynamic-response-time formula of optical fiber and analyzed the dynamic response capability of optical fiber with different diameters. Fast-response fiber Bragg grating (FR-FBG) temperature sensors were designed and manufactured. The experiments confirmed the relationship between the response time and the diameter of the grating.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Review
Chemistry, Physical
Marco Bonopera
Summary: With the development of fiber optical technologies, fiber Bragg grating (FBG) sensors are increasingly used in structural health monitoring. This article provides an overview of the recent advancements and principles of FBG-based displacement sensors, focusing on wavelength, intensity, and phase signal demodulation. Future research will aim to improve the efficiency of FBG-based displacement sensors through the use of different elastic structures, gratings manufactured through special fibers, and new temperature compensation methodologies.
Article
Engineering, Electrical & Electronic
Bo Yuan, Yinquan Yuan, Chenghua Zhang, Zhangyan Zhao
Summary: This study proposes a novel monitoring method that combines photogrammetry and fiber Bragg grating (FBG) sensors, providing real-time and long-term monitoring of critical structures. The method is validated through experiments and simulations.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Liqi Huang, Li Xiong, Yongxing Guo, Zhongchun Hu
Summary: This research proposes an innovative method for fabricating all-silicon sensors by using silicon glass as the substrate and packaging material. The proposed approach, which involves packaging an elastic glass cantilever beam and an FBG with molten glass powder, has been tested and shown to have good package quality and sensing performance. The introduced packaging technology has potential applications in the fabrication of high-performance FBG sensors, as demonstrated by the successful creation of an FBG tilt sensor with good linearity and repeatability.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Siming Weng, Pei Yuan, Lidan Lu, Dongliang Zhang, Lianqing Zhu
Summary: In this study, a novel silicon-based AWG was designed and fabricated as a critical component for fiber Bragg grating interrogation systems. By modifying the input waveguide with an MMI coupler, the AWG achieved higher demodulation precision and wider dynamic range. The optimized AWG exhibited excellent performance with low crosstalk, wide dynamic range, and high resolution, showing great potential for fiber Bragg grating interrogation.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yongxing Guo, Wanhuan Zhou, Li Xiong, Xinglin Zhou, Litong Li
Summary: This paper introduces a fiber Bragg grating displacement sensor suitable for alternate positive and negative displacement measurements. Through a unique design using two pairs of FBG - cantilever - wedge shaped slider structures, the sensor is able to detect both positive and negative displacements. Experimental results demonstrate that the sensor has a good measurement range and sensitivity, as well as micro-displacement measurement capability, creep resistance, and temperature compensation performance.
IEEE SENSORS JOURNAL
(2021)
Article
Physics, Multidisciplinary
S. D. V. S. Jagannadha Raju, S. Maidul Hague, B. Karthik Goud, Rajnarayan De, J. S. Misal, K. Divakar Rao
Summary: Fiber Bragg grating sensors are used to monitor physical parameters like temperature in unconventional environments. This study demonstrates the versatility of these sensors to monitor substrate temperatures during thin film deposition on different types of substrates, providing more accurate measurements and multiplexing capability.
Article
Engineering, Electrical & Electronic
Dongtao Hu, Shanke Lv, Yongxing Guo, Huagang He, Jiayi Liu
Summary: The article presents a fiber Bragg grating (FBG) force sensor with enhanced sensitivity using a strain-reinforcing mechanism, achieving high sensitivity and good performance, demonstrating potential for superior structural health monitoring.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Marine
Ziguang Jia, Guangda Ma, Xin Su, Yibo Li, Chenghao Xing, Shuhan Ye, Xuan Yi, Chunxu Qu
Summary: Ocean platforms under complex sea conditions and loads are prone to fatigue cracks. This study developed an adaptive range strain sensor using a high-sensitivity fiber Bragg grating (FBG) sensor to monitor micro deformations and detect the entire structural crack propagation process. The sensor can automatically adapt to crack fractures and provide warnings when sudden cracks occur, causing large deformations.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Yizhuo Li, Fengyi Chen, Teng Guo, Ruohui Wang, Xueguang Qiao
Summary: We propose and develop a high-sensitivity fiber Bragg grating accelerometer based on a flexible hinge, which significantly improves sensitivity and reliability by optimizing the grating structure. The results show that this structure can effectively detect vibrations in seismic exploration.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Zhongxin Tang, Shuxin Wang, Chaoyang Shi
Summary: This paper presents a novel Fiber Bragg Grating (FBG) based hybrid force and displacement sensor with high sensitivity and linearity. The sensor utilizes a carefully designed spring structure and optical fiber layout to achieve excellent performance through optimized design.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Jie Li, Hong-Hu Zhu, Bing Wu, Le-Le Hu, Xi-Feng Liu, Bin Shi
Summary: In this study, the AH-FBG sensing technology was used to accurately measure in-situ moisture contents of expansive soil. The impact of soil cracks on the measurements was investigated and a modified function was proposed to eliminate measurement errors. The results show that the AH-FBG sensing technology can be extended to the reliable measurement of expansive soil moisture.
Article
Optics
Xianfeng Zhao, Zhen'an Jia, Wei Fan, Wangfei Liu, Hong Gao, Kaiqing Yang, Dakuan Yu
Summary: The FBG accelerometer based on a composite beam utilizes the opposite movement of two FBGs to reduce the impact of temperature and improve sensitivity. Experimental results demonstrate that the sensor structure is minimally affected by temperature within a certain range and has good performance at specific frequency ranges.
Article
Engineering, Electrical & Electronic
Yongxing Guo, Jiajing Zhu, Li Xiong, Jiaxi Guan
Summary: This paper proposes a new finger motion detection method based on optical fiber Bragg grating (FBG) with polyimide substrate, which monitors the deformation around the forearm caused by finger motion. Through tests, it is verified that FBG with polyimide substrate has good response characteristics and applicability. The experimental results show that this method can effectively detect static gestures and has good repeatability.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Multidisciplinary
Asma Alsadat Mousavi, Chunwei Zhang, Sami F. Masri, Gholamreza Gholipour
Summary: Signal processing is crucial in vibration-based approaches and damage detection for structural health monitoring. The complete ensemble empirical mode decomposition with adaptive noise technique shows superior robustness and sensitivity in addressing damage location, classification, and detection compared to other decomposition techniques.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Acoustics
Arameh Eyvazian, Chunwei Zhang, Farayi Musharavati, Afrasyab Khan, Mohammad Alkhedher
Summary: The treatment of the first natural frequency of a rotating nanocomposite beam reinforced with graphene platelet is discussed in this paper. The impact of adding graphene platelet to the beam is studied, and it is found that the addition can enhance the natural frequency of the beam but may decrease it in a thermal environment.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Mechanical
Amin Taghieh, Ardashir Mohammadzadeh, Chunwei Zhang, Sakthivel Rathinasamy, Stelios Bekiros
Summary: A novel observer-based control policy using an interval type-3 fuzzy logic system is developed to overcome the limitations of fuzzy-based controllers in approximating uncertainties and analyzing complex nonlinear systems without detailed dynamics model information. The proposed approach includes online optimized tuning rules, a simple type reduction method, and adaptive mechanisms. It also utilizes an adaptive compensator to improve the robust performance of the closed-loop system and mitigate the effects of approximation errors. Stability analysis is conducted using appropriate Lyapunov functions and Barbalat's lemma. Simulations and experimental implementations demonstrate that the suggested approach achieves more accurate approximation of unknown models and complex nonlinearities, and exhibits good resistance against uncertainties and parameter variations.
NONLINEAR DYNAMICS
(2023)
Article
Mechanics
Arameh Eyvazian, Chunwei Zhang, Mohammad Alkhedher, Sami Muhsen, Mohamed Abdelghany Elkotb
Summary: This comprehensive study investigates the thermal buckling instability and post-critical deflection of a rotating nanocomposite microbeam reinforced with graphene platelet. The study shows that reinforcing the microbeam with graphene platelet using an X-pattern enhances its static strength against buckling instability.
COMPOSITE STRUCTURES
(2023)
Review
Green & Sustainable Science & Technology
Chunwei Zhang, Hossein Khorshidi, Elham Najafi, Marziyeh Ghasemi
Summary: Nanomaterials, with their exceptional properties, have attracted attention for their use in nano-modified alkali-activated composites (AACs) or geopolymers. The most commonly used nanomaterial was nano-SiO2, and the majority of studies focused on paste, mortar, and concrete composites. Increasing the nanomaterials content in an alkaline medium reduced AACs consistency and setting time. The incorporation of nanomaterials improved mechanical characteristics, but excessive amounts led to deterioration. Analytical tests indicated that nanomaterials contributed to a denser, homogenous structure with more stable chemical bonds and higher amorphicity. Proper selection and incorporation of nanomaterials in AACs can greatly enhance their mechanical and microstructural properties, promoting sustainable construction materials.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Mechanics
Li Sun, Tianqi Liang, Chunwei Zhang, Jianyun Chen
Summary: This study investigates the compounded shear-thickening fluids (STFs) consisting of needlelike carbon fiber powder (CFP), silicon dioxide (SiO2), and polyethylene glycol (PEG). The compounded STFs exhibit significant rheological behavior and shear-thickening effects, and show excellent energy dissipation capacity and dynamic stability. The key performance index of the compounded STFs is demonstrated to be improved by ten times or even higher, making it a novel type of STFs for engineering practice.
Review
Computer Science, Interdisciplinary Applications
Chunwei Zhang, Masoud Abedini
Summary: This study provides a review of previous research on the influence of strain rate on the dynamic and quasi-static behavior of concrete and steel materials. The research shows that strain rate has a significant effect on the material behavior, particularly in blast analysis. Experimental and numerical investigations demonstrate the impacts of strain rate on various mechanical properties of concrete and steel materials under high loading conditions. The findings suggest that strain rate should be considered in structural performance assessment, especially in severe loading circumstances.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Engineering, Civil
Marziyeh Ghasemi, Chunwei Zhang, Hossein Khorshidi, Limeng Zhu, Po -Chien Hsiao
Summary: This study investigates the behavior of a cost-effective and easy-to-install displacement-restraint cable bracing technique (cable-cylinder) for seismic upgrading of RC frames. The results reveal that cable cylinder braces have increased the first-story column shear more than regular cable braces, while lowering the maximum compression force of the adjacent column. This technique has significant implications for improving the performance of RC frames.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Chunwei Zhang, Cunkun Duan, Li Sun
Summary: This study explores the feasibility of using the friction pendulum system based inter-storey isolation strategy as an alternative to the friction pendulum system base isolation for vibration control of high-rise structures during earthquakes. Experimental and computational analysis are conducted, showing that FPS-I can effectively suppress the acceleration of the superstructure and impact the response of the lower substructure. The FPS-I strategy achieves a vibration reduction effect between 50% and 60%, which is significantly better than the FPS-B scheme. The research also demonstrates that FPS-I has a greater effectiveness in reducing the vibrations of the entire structure during strong earthquakes compared to FPS-B.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Chemistry, Physical
Hongmei Xiao, Peng Yu, Limeng Zhu, Chunwei Zhang, Po-Chien Hsiao
Summary: A protective concrete-filled steel plate composite wall (PSC) is developed, which consists of a core concrete-filled bilateral steel plate composite shear wall and two lateral replaceable surface steel plates with energy-absorbing layers. The PSC wall exhibits high in-plane seismic performance and out-of-plane impact performance, making it suitable for high-rise constructions, civil defence initiatives, and buildings with stringent structural safety criteria. Finite element models are used to investigate the out-of-plane low-velocity impact behavior of the PSC wall, and the results show that the replaceable energy-absorbing layer significantly reduces displacement and plastic deformation by absorbing a large amount of impact energy. The PSC wall also maintains high in-plane seismic performance under impact load.
Article
Multidisciplinary Sciences
Songhua Xu, Chunwei Zhang, Ardashir Mohammadzadeh
Summary: This paper investigates the control of robotic manipulators (RMs) which are widely used in industry. The highly nonlinear dynamics and the interaction of inputs-outputs cannot be ignored to improve accuracy in practice. Non-structural uncertainties such as friction, disturbance, and unmodeled dynamics pose additional challenges. Recently, a control idea based on type-3 fuzzy logic systems (FLSs) has been suggested, which shows better accuracy in noisy environments. The proposed approach utilizes T3-FLSs to estimate the dynamics of RMs and compensates for symmetrical perturbations, enhancing stability through online learning.
Article
Engineering, Geological
Jingcai Zhang, Chunwei Zhang
Summary: This paper investigates the effectiveness of viscoelastic (VE) material with different mechanical properties in reducing pounding between neighboring buildings, considering soil-structure interactions (SSI). The study considers unequal-story-height adjacent buildings/frames and three types of soil. Numerical investigations are conducted to evaluate the mitigating performance of the VE material in terms of pounding force, acceleration amplification, and inter-story drift. The results confirm that the seismic response of buildings, particularly the acceleration of collision floors, can be significantly amplified by collisions, but can be reduced by VE material for all types of soil.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Chunwei Zhang, Cunkun Duan, Li Sun, Limeng Zhu, Po-Chien Hsiao
Summary: This article compares three operating systems, namely friction pendulum system (FPS) base isolation form: FPS-B, FPS inter-story isolation form: FPS-I, and FPS hybrid isolation form: FPS-H, to solve the difficulties associated with deploying isolation technique in high-rise structures. The structural seismic responses of the three control systems were analyzed using a 9-layer scaled test model constructed with the third generation benchmark model. The results show that the FPS-H technology greatly reduces the acceleration impact of both the superstructure and substructure in mild and major earthquakes, primarily by changing the dynamic characteristics of the whole structure.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Civil
Chunwei Zhang, Cunkun Duan, Li Sun
Summary: This paper presents a comprehensive experimental investigation of high-rise structure employing the friction pendulum system (FPS) in accordance with inter-storey isolation control strategy. The test results demonstrate that when the FPS is installed on the 6th to 8th floors of the structure, the top floor's acceleration attenuation rate is approaching 67%, leaving the controlled structure's response is only one third of the uncontrolled structure.
Review
Acoustics
Chunwei Zhang, Hadi Kordestani, Mahdi Shadabfar
Summary: This paper provides a state-of-the-art review of available solutions for reducing undesired vibrations in trains. The solutions are divided into two main categories: direct solutions applied to trains' bodies or bogies, and indirect solutions that control vibrations in railway bridge structures. The review also examines modal identification of trains and railway infrastructures, and proposes the use of tuned rotatory inertia dampers and active rotatory inertia drivers to address the limitations of the sky-hook model. Additionally, three practical solutions are identified for mitigating vibration and noise in trains.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
