Article
Engineering, Mechanical
Tailong Liu, Teng Pan, Shuijie Qin, Hui Zhao, Huikai Xie
Summary: This paper investigates the complex interactions among multiple energy domains in an immersed electrothermally actuated MEMS mirror and builds a damping model. By using regression analysis, the fluid damping model is solved and the effectiveness and accuracy of the models are verified through experimental results. The developed model in this work can be applied to study the dynamic behaviors of various immersed MEMS actuators.
Article
Engineering, Multidisciplinary
Fujun Wang, Beichao Shi, Zhichen Huo, Yanlin Tian, Dawei Zhang
Summary: This paper proposes a control and dynamic releasing method for a symmetric microgripper with integrated position sensing. A combined feedforward/feedback position controller is established to improve the motion accuracy of the microgripper in high frequency. Experimental tests validate the effectiveness of the proposed method in improving motion accuracy and operation efficiency of the microgripper system.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Liwei Yan, Yuanbo Cai, Yinfu Luo, Tong Sun, Shengtai Zhou, Yang Chen, Huawei Zou, Mei Liang, Yadan Yang
Summary: Liquid silicone rubber-based composites were used to investigate the response behavior of ablative materials under different hyperthermal environments. Computational fluid dynamics simulation showed that oxyacetylene flames have similar temperature distributions with different heat fluxes, but gas flow scouring force increases significantly with increasing heat flux. The ablation performance decreases with higher heat flux, mainly due to the hybrid coupling between mechanical denudation and oxidative erosion.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Mechanical
Hanlu Li, Weihao Ren, Lin Yang, Chengcheng Ma, Siyu Tang, Ruijia Yuan
Summary: A tunable-focus liquid lens driven by a novel piezoelectric motor is proposed in this paper for adaptive eyeglass application. The motor can provide vertical force to change the lens curvature, allowing for precise adjustments within a certain range. Experimental testing shows the liquid lens exhibits stable zooming characteristics, suggesting potential for use in adaptive eyeglasses and mobile systems in the future.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Nami Tagami-Kanada, Koji Yoshikuni, Satoru Mizuno, Toru Sawai, Manabu Fuchihata, Tamio Ida
Summary: Bio-coke is a solid biofuel that can replace coal and coal coke. By studying the effects of biomass type and production conditions on combustion characteristics, it was found that the combustion time of bio-coke can be predicted using a shape factor and is not affected by aspect ratio. Additionally, Japanese cedar bio-coke has a 2.5 times faster flaming combustion rate compared to green tea bio-coke.
Review
Plant Sciences
Xinyu Fu, Berkley J. Walker
Summary: Photorespiration plays an important role in maintaining photosynthetic carbon assimilation and energy balancing under dynamic light conditions. It is closely linked to the C-3 cycle and can help balance fluxes. Regulation of photorespiration is crucial for maintaining appropriate metabolic fluxes related to nitrogen and one-carbon metabolism under dynamic conditions.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Construction & Building Technology
James H. Haido, Ayad A. Abdul, Mustafa M. Al, B. H. Abu Bakar, Salim T. Yousif, Bassam A. Tayeh
Summary: By increasing the length of steel fibers, the maximum dynamic deflection or ductility of the member can be achieved.
ADVANCES IN CONCRETE CONSTRUCTION
(2021)
Article
Engineering, Mechanical
Yuan Li, Chen Yu, Tao Suo, Yuquan Wen
Summary: In this study, numerical models based on experimental results were used to investigate the changing rules of maximum fragment velocity under different aspect ratios in hollow charges. The differences between driving behaviors under different detonations were also discovered. Formulae for maximum fragment velocity under end and central line or hollow surface detonations were established for the first time and their accuracy was verified through experiments. This study provides valuable references for optimal design and damage assessment of ammunition, as well as for the design of protection structures.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
K. Shu, H. H. Ding, A. Mazzu, Q. Lin, J. Guo, E. Meli, Q. Y. Liu, W. J. Wang
Summary: This study focuses on the impact of Gobi and desert dynamic windblown sand environments on the wear and damage behaviors of wheel-rail under different slip ratios. The results show that the trends of adhesion coefficient with slip ratio vary in these three conditions, and the wear rate can be ranked as: dry > desert > Gobi. The study also proposes the interaction mechanism between sand and wheel-rail interface and summarizes the reasons for wear reduction in dynamic windblown sand environments.
Article
Engineering, Civil
Heng Jin, Andrea Calabrese, Yong Liu
Summary: This study numerically modeled the hydrodynamic characteristics of liquid sloshing in a 2D rectangular tank and the pressure response in a typical industrial container due to external excitation. The effects of filling depth, ground motion components, and damping baffle on pressure response history under impulsive and convective modes were examined. A damping baffle system suitable for all seismic excitations was developed based on dynamic response analysis, contributing to improving tank design in earthquake-prone areas.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Chemical
Haozhe Yi, Chunying Zhu, Taotao Fu, Youguang Ma
Summary: This study investigated the evolution of neck width during droplet coalescence in rectangular microchannels, revealing two distinct stages with different exponents under various flow rate ratios and aspect ratios. The research also identified a turning point where the neck width increases linearly with the two-phase flow rate ratio, and the arrival time decreases exponentially with the increase of flow rate ratio.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Thermodynamics
Ajeet Kumar, Sung Hoon Park, Deepak Rajaram Patil, Geon-Tae Hwang, Jungho Ryu
Summary: The aspect ratio of piezoelectric constituents significantly affects the output electric potential of the energy harvester, with magnetostrictive vibrations dominating the generated output energy. The experimental results are in good agreement with the finite element analysis results.
Article
Engineering, Civil
Enhe Bao, Zuhong Tang, Huijuan Liu, Qi Li
Summary: The average shear-bearing ratio (beta) of buckling restrained brace (BRB) is a key parameter that affects the seismic performance of buckling restrained braced steel frames (BRBF). Different beta values lead to variations in shear displacement, bending displacement, and vibration mode of the structure.
Article
Engineering, Geological
Jin Huang, Xiaoli Liu, Danqing Song, Jian Zhao, Enzhi Wang, Jianmin Zhang
Summary: An auxiliary device for simulating the liquid-filled layer was developed to analyze the dynamic response characteristics of liquid-filled rock joints in the laboratory. The experimental results showed that the energy propagation coefficient and peak liquid pressure decreased with increasing joint inclination within the considered range, and smaller coefficient values were obtained for granite specimens compared with PMMA specimens. The peak pressure for granite specimens was slightly higher than that for PMMA specimens.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Thermodynamics
Qingsong Zuo, Yongchuan Xie, Wei Chen, Xinning Zhu, Yuanyou Tang, Yong Xie, Hehui Zhang, Ying Ma
Summary: This paper investigates the effect of aspect ratio on the output performance of thermoelectric generator (TEG) systems. It is found that TEG systems with low aspect ratio channels exhibit better output performance, with 18.3% higher output power than TEG systems with high aspect ratio channels. The lower aspect ratio reduces the hydraulic diameter of the collector channel and improves heat transfer performance. Additionally, the study analyzes the effects of fin number and load resistance on the TEG system's output performance. The research provides new ideas for improving the output performance of TEG systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Pedro Roncero-Sanchez, Alfonso Parreno Torres, Javier Vazquez, Francisco Javier Lopez-Alcolea, Emilio J. Molina-Martinez, Felix Garcia-Torres
Summary: HVDC systems facilitate renewable energy integration, improve power quality, and achieve power control and balance between multiple networks.
Article
Chemistry, Analytical
Jorge Hernando-Garcia, Jose Luis Garcia-Caraballo, Victor Ruiz-Diez, Jose Luis Sanchez-Rojas
Summary: The study compares the motion of a robot using standing waves (SW) and traveling waves (TW), with SW achieving a higher speed but requiring more precise positioning and tuning.
Article
Engineering, Mechanical
Victor Ruiz-Diez, Jorge Hernando-Garcia, Javier Toledo, Abdallah Ababneh, Helmut Seidel, Jose Luis Sanchez-Rojas
Summary: This study presents the design, fabrication, and performance of piezoelectric bidirectional conveyors based on MEMS. By optimizing electrode patches and adding 3D-printed legs, these devices can achieve efficient conveyance with speeds exceeding 35mm/s and payloads over 10 times the motor weight.
Article
Energy & Fuels
Javier Tobajas, Felix Garcia-Torres, Pedro Roncero-Sanchez, Javier Vazquez, Ladjel Bellatreche, Emilio Nieto
Summary: This study focuses on the development of a resilience-oriented optimization for microgrids with hybrid Energy Storage System (ESS), validated through numerical simulations. The research aims to improve the autonomy of the microgrid and achieve a rapid transition response.
Article
Chemistry, Analytical
Javier Toledo, Victor Ruiz-Diez, Jaime Velasco, Jorge Hernando-Garcia, Jose Luis Sanchez-Rojas
Summary: The study successfully achieved real-time monitoring of density and viscosity by designing a 3D-printed liquid cell, reducing costs and improving sensor performance and accuracy. Based on the experimental results, the sensor can accurately detect changes in density and viscosity during grape must fermentation processes.
Article
Chemistry, Multidisciplinary
Miguel A. Arranz, Elena H. Sanchez, Victor Ruiz-Diez, Jose L. Sanchez-Rojas, Jose M. Colino
Summary: This paper presents an experimental method to induce strong magnetic linear birefringence in two-dimensional assemblies of Co nanoclusters grown on glass plates. The study correlates the magnitude and characteristics of the nonlinear magneto-optical effect with the thickness and profile of the nanostructures. The research is significant for understanding the magnetic properties of ultrathin Co assemblies.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Victor Ruiz-Diez, Jose Luis Garcia-Caraballo, Jorge Hernando-Garcia, Jose Luis Sanchez-Rojas
Summary: In this study, a miniature robot measuring 20mm in length was proposed, featuring piezoelectric actuation for controlled motion direction. Locomotion was achieved through the generation of standing waves on each plate, allowing the robot to move in bidirectional straight paths up to 65mm at a speed of 2mm/s. Precise steps as low as 1μm and controlled spins with turns as low as 0.013 deg. were also demonstrated under the same conditions, showcasing the robot's capabilities to navigate complex trajectories and carry weight significantly exceeding its own.
Article
Materials Science, Multidisciplinary
M. A. Arranz, Elena H. Sanchez, Y. Moreno, V. Ruiz-Diez, J. L. Sanchez-Rojas, Jose M. Colino
Summary: This study proves the existence of uniaxial magnetic anisotropy (UMA) that is directly related to thickness gradients in a material system composed of Co nanoclusters. The presence of UMA is observed in high-gradient films and is explained by the extra cluster terraces associated with the high gradient thickness. The study also analyzes the contributions of surface and bulk to the effective magnetic anisotropy energy.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Analytical
Victor Ruiz-Diez, Abdallah Ababneh, Helmut Seidel, Jose Luis Sanchez-Rojas
Summary: This paper presents the design, fabrication, and performance of a hybrid piezoelectric planar micro-conveyor based on MEMS bridge resonators and 3D-printed vertical legs. The system converts vertical vibrations into horizontal rotations or translations for precise transportation of small objects. The study also investigates the effects of leg tip and slider's surface treatment on the conveyor performance, and demonstrates its application as a reconfigurable electronic system.
Editorial Material
Chemistry, Analytical
Jose Luis Sanchez-Rojas
Article
Engineering, Electrical & Electronic
Victor Corsino, Victor Ruiz-Diez, Jose Manuel Gilperez, Mario Ramirez-Palma, Jose Luis Sanchez-Rojas
Summary: Systems combining sensor networks and artificial intelligence algorithms are important in modern industry, improving workflow efficiency and decision-making. This study developed an advanced approach using a vibrating membrane integrated with a 3D-printed cell and cost-effective electronics to collect spectral data from liquids. By leveraging machine learning models, essential properties of the liquids were inferred, with the system showcasing remarkable precision in estimating viscosity and density.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Proceedings Paper
Education, Scientific Disciplines
Javier Vazquez, Alfonso Parreno Torres, F. Javier Lopez Alcolea, Emilio J. Molina Martinez, Pedro Roncero-Sanchez
Summary: This work presents the implementation of a home alarm system with acoustic, proximity, and motion sensors on the Basys3 platform, which is based on configurable logic and incorporates an Artix-7 FPGA. The system is designed using VHDL and follows a modular approach.
XV INTERNATIONAL CONFERENCE OF TECHNOLOGY, LEARNING AND TEACHING OF ELECTRONICS (TAEE 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Fco Javier Lopez-Alcolea, Emilio J. Molina-Martinez, Javier Vazquez, Alfonso Parreno Torres, Pedro Roncero-Sanchez, Antonio Moreno-Munoz, Joaquin Garrido-Zafra, Felix Garcia-Torres
Summary: This paper introduces a method for estimating the harmonic content of current demanded by loads in a microgrid using an active power filter. The approach aims to complement IoT measurements in a microgrid by speeding up the estimation of harmonic distortion amplitudes. The proposed method includes a fast online calculation for the APF reference current and a procedure for monitoring its spectral content, demonstrating its validity through simulation results.
2021 21ST IEEE INTERNATIONAL CONFERENCE ON ENVIRONMENT AND ELECTRICAL ENGINEERING AND 2021 5TH IEEE INDUSTRIAL AND COMMERCIAL POWER SYSTEMS EUROPE (EEEIC/I&CPS EUROPE)
(2021)
