Article
Engineering, Electrical & Electronic
Danny A. Kassie, David Elata
Summary: A novel technique for operating a double-sided comb-drive resonator was demonstrated in this study. By utilizing two out-of-phase ac signals on the drive stators and a pure harmonic signal on the rotor, two frequency mixing operations were achieved, resulting in a clear response at the 3rd harmonic of the drive signal. The resonator was shown to be insensitive to feed-through currents and imbalanced sense ports, and a clear response could be achieved for low-power drive signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Robotics
Liang Wang, Wuyao Jiang, Zeyan Wu, Longfei Zhao, Zongxia Jiao
Summary: Birds use wing-tail interaction to control their attitude by unfolding their tails in wing induced flow at hover. This study applies this mechanism to pitch control of a flapping wing aircraft. The proposed theory is experimentally validated and a frequency dependent tail controller is designed, showing promising potential in similar tailed aircraft.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yueshi Guan, Yi Cheng, Tingting Yao, Yijie Wang, Wei Wang, Dianguo Xu
Summary: This article proposes a high-performance modified Y-source dc-dc converter that achieves soft switching characteristics and improved voltage gain. By utilizing one coupled inductor winding and constructing a resonant cell with switch parasitic capacitor, the converter enables zero voltage switching (ZVS) for the switch and zero current switching for the diodes. The control strategy of hybrid pulsewidth modulation and pulse frequency modulation (PFM) ensures ZVS operation within a wide range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Jingjing Huang, Xiaoyu Wang, Geng Li, Yuangang Sun, Aimin Zhang, Jinyu Wang
Summary: The importance of suppressing dc voltage ripple in resonant dc/dc converters to improve efficiency and ensure power quality is discussed in this paper. An analytical methodology based on instantaneous power theory is proposed to establish a model suitable for any cases and it is found that the voltage ripple largely depends on the switching frequency. A multisteps frequency range design approach is presented to ensure allowable voltage ripple in the entire power range.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Mechanics
Fabien Beaumont, Sebastien Murer, Fabien Bogard, Guillaume Polidori
Summary: Migratory birds have developed remarkable adaptive capacities to fly at high altitudes, adjusting their wing flapping frequency and forces exerted on the wing to maintain a balance between flight performance and energy cost during migration.
Article
Automation & Control Systems
Roberto A. Fantino, Shamar F. Christian, Juan C. Balda
Summary: In this article, a bidirectional discontinuous-conduction-mode constant on-time variable-frequency control strategy for a three-phase interleaved dc-dc converter suitable for traction applications is proposed. The strategy enhances efficiency at low-power conditions and provides fairly constant efficiency over the entire power range by synchronously controlling both the bottom and top switches of the three boost phases. Simulation and experimental results demonstrate the validity and effectiveness of the proposed approach on a 10-kW bidirectional interleaved boost converter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Peng Li, Yijing Wang, Lei Liu, Xialin Li, Zhiqiang Zuo
Summary: This paper proposes a novel low frequency current-mode control strategy to improve overshoot suppression performance for boost converter against load current and source voltage disturbances. The proposed strategy presents a cascade dual-loop structure and delivers excellent disturbance suppression and reference current tracking capabilities.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Engineering, Electrical & Electronic
Yongcun Hao, Chenggang Wang, Zheng Sun, Zhao Zhang, Jin Guo, Honglong Chang
Summary: This paper presents a DC electric field sensor based on the mode localization phenomenon, which utilizes the amplitude ratio change of resonators to sense the electric field strength, demonstrating high sensitivity and stability compared to other high-performance micromachined EFS.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Marine
Bing Zhu, Zhiwei Tai, Dongmei Du, Junwei Zhang
Summary: This study investigated the effects of wave wing phase difference, encounter frequency, and wing submergence depth on the energy extraction performance of flapping wing hydroelectric generators. The results revealed that the phase difference was the primary factor influencing energy extraction efficiency. The incoming gravity wave had the most positive effect on efficiency within the range of 0 degrees-90 degrees. Additionally, energy extraction efficiency increased with encounter frequency, and optimal periodicity was achieved when the wing oscillation frequency matched the encounter frequency.
Article
Engineering, Electrical & Electronic
Lucas de Araujo Pereira, Adrien Morel, Mustapha Touhami, Theo Lamorelle, Ghislain Despesse, Gael Pillonnet
Summary: This letter presents an experimentally validated model to accurately predict the operating frequency, the switching angles, and the piezoelectric current for any six-phase piezoelectric dc-dc converter. This model reduces the transient simulation's calculation time to reach the steady state and can be used to initially setup the switching angles in the experiment or predict the high-frequency spectrum generated by the converter cycle.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Multidisciplinary
Mohd Firdaus Bin Abas, Balbir Singh, Kamarul Arifin Ahmad, Eddie Yin Kwee Ng, Tabrej Khan, Tamer A. Sebaey
Summary: This paper investigates the aerodynamic performance of a bio-inspired flapping wing model using the dwarf Kingfisher wing as a reference. The study includes numerical analysis and experimental validation, revealing the increase of lift and drag coefficients with rotation angle. The results also emphasize the influence of wing-wake interaction on lift asymmetry.
Article
Materials Science, Multidisciplinary
N. V. Doan, V. T. Le, H. C. Park, N. S. Goo
Summary: This study introduces a new DIC method to prevent the effects of painted speckle patterns on thin flexible structures during vibration measurement. By projecting virtual speckle patterns onto the surfaces of structures, higher natural frequencies are obtained, proving the effectiveness of the proposed method.
EXPERIMENTAL MECHANICS
(2022)
Article
Engineering, Electrical & Electronic
Yudai Furukawa, Yuichiro Shibata, Haruhi Eto, Ilhami Colak, Fujio Kurokawa
Summary: This article discusses the design guidelines and design charts of a digital peak current mode dc-dc converter, emphasizing the analysis of its static characteristics. The relationship between key parameters is revealed and validated through experiments, demonstrating the effectiveness of the design.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Aerospace
Dong Xue, Bifeng Song
Summary: Two methods have been proposed to improve flight efficiency through adjusting flexibility of the composite anisotropic flapping wing: changing rib diameters and adding a mass lump. Adding a mass lump can enhance static thrust and propulsive efficiency, leading to a 9% improvement in flight efficiency compared to the baseline wing.
JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Automation & Control Systems
Yisheng Yuan, Neng Peng, Wei Liu, Chenyu Yi
Summary: This article proposes a linear-resonant hybrid bridge dc-dc converter, which adds a set of linear-bridge-arm to the traditional half-bridge LLC resonant converter. It can operate in high-voltage-gain and low-voltage-gain modes and achieves soft-switching and negligible feedback current. The experimental results confirm the feasibility of the proposed converter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)