Zihao Zhang

Wuhan University of Technology

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Hang Sun

Anhui Polytechnic University

Chunlai Yang

Anhui Polytechnic University

Hai Wang

Anhui Polytechnic University

Ye Tang

Northwestern Polytechnical University

Yikai Yuan

West China Hospital of Sichuan University

Henian Li

Anhui Polytechnic University

Quan Xiao

Wuhan University of Technology

Baoying Xing

Kunming University of Science and Technology

Deyan Lin

Wuhan University of Technology

Peng Yao

Shandong University

Cooperative Institutions

Wuhan University of Technology

Zhengzhou University

Chinese Academy of Sciences

Anhui Polytechnic University

Kunming University of Science and Technology

Tianjin University

Shandong University

Ministry of Education of the People's Republic of China

Huazhong University of Science and Technology

West China Hospital of Sichuan University

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Compensation Network Design for WPTS with Independence Coupling Coefficient in CC and CV Modes with ZPA, and Its Simplest Network

IEEE Transactions on Power Electronics (2024)

Quan Xiao Song Xiong Wenjie Deng Zihao Zhang Zhiwei Zhang

Independence

10.1109/tpel.2024.3522131

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Improving the performance of galloping energy harvester with striped bluff body

AIP Advances (2023)

Hai Wang Hang Sun Zihao Zhang Ye Tang Chunlai Yang

To improve the performance and efficiency of ordinary galloping energy harvesters (GEHs), this paper proposes a GEH with a striped bluff body. The fluid-structure coupling simulation of the bluff body and the oscillator of the energy harvester was carried out using COMSOL Multiphysics. The cloud diagram in the flow field, tip displacement at the tip of the beam, lifting and dragging force, and trace and frequency response of the harvester are analyzed. Simulation results show that the GEH with a striped bluff body has the characteristics of rising frequency and falling peak compared with the ordinary GEH, which can be locked at a fixed peak to form a stable periodic response. Experimental results show that the striped bluff body energy harvester displays better energy harvest performance. The output root mean square voltage can be increased by 119.2% at 2 m/s wind speed, which means that the galloping harvester with a striped bluff body has more stable dynamic characteristics and shows better energy harvest performance.

Bluff

10.1063/5.0151151

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Citations (1)

Electromagnetic energy harvester for harvesting energy from low-frequency vibration

2018 IEEE International Magnetics Conference (INTERMAG) (2018)

Kun Zhang Yufeng Su Jianqiao Ding Zihao Zhang

We present an electromagnetic energy harvester with magnetic spring for converting low-frequency human motion into electrical energy. The magnetic spring is formed by magnetic forces between the fixed and moving magnets. Inductive coils are arranged at three special positions to obtain a larger output voltage. The experiment results show that the proposed energy harvesters possess frequency up-conversion behavior. A peak-topeak voltage of 5.68V was obtained at excitation acceleration of 0.32g and frequency of 6.25Hz. Four LEDs in series were lit up successfully through an oscillation circuit which is connected to the energy harvester prototype.

Extremely low frequency

Oscillation (cell signaling)

10.1109/intmag.2018.8508434

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Ground Fault Detection of Photovoltaic and Energy Storage DC Converter Load on User Side

Electronics (2024)

Kai Zhang Jian Yang Jian Li Zihao Zhang Ling Gu

With the rapid development of DC power supply technology, the operation, maintenance, and fault detection of DC power supply equipment and devices on the user side have become important tasks in power load management. DC/DC converters, as core components of photovoltaic and energy storage DC systems, have issues with detecting ground faults on the positive and negative input/output buses, leading to difficulties in troubleshooting device malfunctions and potentially endangering user safety. To address these issues, a method for detecting ground faults on the positive and negative buses of a synchronous buck photovoltaic and energy storage DC/DC converter is proposed, which involves the comprehensive measurement of multi-point common-mode voltages. This method collects the input positive bus voltage, output positive bus voltage, switch voltage, and the common-mode voltage at the midpoint of the bridge arm, then sums these after removing the switching harmonics. By analyzing the characteristic differences of the summed voltage under the ground fault modes of the positive and negative input/output buses, characteristic parameters are extracted to establish a ground fault identification method, thereby achieving effective detection of ground faults in the photovoltaic and energy storage DC/DC converter. Finally, the effectiveness of the method proposed in this paper was validated through simulations and experiments.

Demand side

10.3390/electronics13224505

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Exploring the Potential of Flow-Induced Vibration Energy Harvesting Using a Corrugated Hyperstructure Bluff Body

Micromachines (2023)

Yikai Yuan Hai Wang Chunlai Yang Hang Sun Ye Tang

Fluid-induced vibration is a common phenomenon in fluid-structure interaction. A flow-induced vibrational energy harvester based on a corrugated hyperstructure bluff body which can improve energy collection efficiency under low wind speeds is proposed in this paper. CFD simulation of the proposed energy harvester was carried out with COMSOL Multiphysics. The flow field around the harvester and the output voltage in different flow velocities is discussed and validated with experiments. Simulation results show that the proposed harvester has an improved harvesting efficiency and higher output voltage. Experimental results show that the output voltage amplitude of the harvester increased by 189% under 2 m/s wind speed.

Multiphysics

Bluff

Vortex-induced vibration

10.3390/mi14061125

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Research on energy acquisition technology based on one-dimensional acoustic black hole effect

AIP Advances (2023)

Hai Wang Zihao Zhang Hang Sun Henian Li Ye Tang

In this paper, a piezoelectric energy harvester based on periodic one-dimensional acoustic black holes (ABH) is proposed to improve efficiency. The harvesting performance of the energy harvester with different ABH-structures was numerically simulated through the commercial software, COMSOL Multiphysics. Finally, an experimental platform was set up to test several energy harvester samples. The results show that the energy aggregation effect of the bilateral ABH beam is better than that of the traditional ABH beam. In the optimal impedance matching, the maximum output power of the energy harvester with bilateral ABH type 3 is 112 mW, which is 2.8 times that of the energy harvester with traditional ABH. The simulation and experimental results show that the energy harvesting efficiency of the proposed ABH is much higher than that of the energy harvester with traditional ABH. It is expected to make some contributions to the further development of lightweight wireless sensors, equipment service life, bearing fault diagnosis, and so on.

Multiphysics

10.1063/5.0141291

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Finite element modeling and analysis of the self-piercing riveting forming process with the ball-shaped die

Materials Today Communications (2024)

Zihao Zhang Kai Zeng Baoying Xing Baipo Shu

Rivet

Ball (mathematics)

10.1016/j.mtcomm.2024.109267

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Analysis of acoustic emission signal in the tensile process of weld-bonding joint and its damage model

Nondestructive Testing And Evaluation (2024)

Jiangbo Chen Baoying Xing Hongshen Zhang Zihao Zhang Kai Zeng

This paper analysed the acoustic emission signals acquired during the tensile test of DP780 weld-bonding joints, and the Gaussian equation was used to fit the cumulative hits and the load to establish relevant damage models. The process parameters were designed based on the Box-Behnken Design method, and the wavelet packet was used to decompose the collected AE signals. The results showed that, in the elastic stage, no AE signal emitted, and the AE signal was mainly concentrated in the plastic stage, the hardening stage and the failure moment of the weld nugget or the adhesive layer. At the failure instant of the adhesive layer or the weld nugget, the signal amplitude was the largest, and the failure frequency was mainly concentrated in the middle and low-frequency bands. The failure of the adhesive layer and the weld nugget could be distinguished from the energy distribution diagrams, and the established damage model could reflect the damage state of the specimen. The results proved that the acoustic emission technique can provide support for the non-destructive testing of the weld-bonding joint.

Acoustic Emission

SIGNAL (programming language)

10.1080/10589759.2024.2332448

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Research on obstacle climbing gait of snake‐like robot on high‐voltage cables cables

Electronics Letters (2021)

Zhiyong Yang Zihao Zhang Fang Qiao Daode Zhang Xing Liu

Abstract Aiming at the gait control problem of a snake‐like inspection robot performing variable‐diameter spiral motion on high‐voltage cables, a gait generation method is proposed here, the snake‐like robot can adapt to the change in diameter when it is winding around the obstacles of high‐voltage cables. The piecewise helix is fitted with the Bezier curve of degree 3, which solves the problem of discontinuous speed and abrupt change of joint angle when the snake‐like robot moves with variable diameter, and avoids periodic motion impact. The new idea provides for the application of a snake‐like robot on high‐voltage cables.

Climbing

High Voltage

10.1049/ell2.12296

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Research on ZVS Phase-Shifted Full-Bridge Broadband Inverter Based on Auxiliary Current Source

Energies (2022)

Yuezhang Zhao Quan Xiao Zihao Zhang Xueting Zhao Deyan Lin

Phase-shifted full-bridge topologies are widely used in medium- and high-power DC/DC converters due to their small size and high switching frequency. However, there are few studies on the application of broadband inverters. In the traditional phase-shift full-bridge inverter with a fully resonant load, the problem of current commutation which leads to hard switching is often encountered, to overcome such an issue, an auxiliary current source network is introduced to realize the zero-voltage turn-on of the lagging bridge arm. The working modes of the converter are analyzed in detail, and the parameters of the auxiliary current source network are designed. The simulation verification is carried out by MATLAB/Simulink in a wide frequency range from 10 kHz to 500 kHz. Finally, an experimental circuit board is designed, and the experimental results show that the topology can achieve soft switching in a frequency range from 10 kHz to 200 kHz and has a certain applicability.

Commutation

Current source

Three-phase

10.3390/en15228661

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Citations (3)