A5001498901- Advanced Algorithms and Applications
- Multilevel Inverters and Converters
- Wireless Power Transfer Systems
- Advanced Battery Technologies Research
- Indoor and Outdoor Localization Technologies
- Underwater Vehicles and Communication Systems
- Advanced Sensor and Control Systems
- Energy Efficient Wireless Sensor Networks
- Embedded Systems and FPGA Design
- Advanced DC-DC Converters
- Power Systems and Renewable Energy
- Advanced Computational Techniques and Applications
- Innovative Energy Harvesting Technologies
- Microgrid Control and Optimization
- Technology and Security Systems
- Electric Vehicles and Infrastructure
- Industrial Technology and Control Systems
- Electrodeposition and Electroless Coatings
- Energy Harvesting in Wireless Networks
- Power Systems and Technologies
- Advanced Adaptive Filtering Techniques
- Adhesion, Friction, and Surface Interactions
- Electrical Contact Performance and Analysis
- Cryptography and Residue Arithmetic
- Advanced SAR Imaging Techniques
Southeast University
2024
Civil Aviation Flight University of China
2024
Hunan University
2021-2023
China University of Petroleum, East China
2019-2020
China Energy Engineering Corporation (China)
2020
Xi'an Technological University
2020
Beijing Institute of Technology
2017-2019
Wuhan University
2016
National Institute of Metrology
2005-2014
Changchun Institute of Technology
2013
The underwater acoustic transducer (UAT) is an electro-acoustic conversion device, which a nonlinear reactive load. An impedance matching network usually added between the power amplifier and UAT. This article proposes hybrid (HIMN) combining passive active matching. Compared with conventional matching, this method can improve frequency range reduce delay. First, model of UAT proposed, principle HIMN analyzed. On basis, parameter design given within required range. Then, to delay system,...
In this article, we present an adaptive broadband thyristor-controlled impedance matching network (TCIMN) for increasing power utilization from a amplifier to the loads. Different conventional passive methods, proposed one can achieve load under wide frequency range of amplifiers. First, operation principle TCIMN is introduced mathematically. Based on that, parameter design method based required range. Moreover, operating and harmonic analyses are provided give firing angle ranges different...
This article proposes an adaptive broadband full-bridge converter impedance matching network (FCIMN) between a power amplifier and the giant magnetostrictive transducer (GMT). Compared with conventional passive methods, proposed one can realize load of amplifiers under wide frequency range. In this article, first, elementary principle operation FCIMN is introduced mathematically. After that, control method to achieve matching, including dynamic active calculation, reactive segmented...
Since the power supply is limited in ships, impedance matching network essential for a high-power underwater electroacoustic transduction system. However, existing networks can barely achieve full under wide frequency change range. This paper proposes shunt active (SAIMN) to adaptive broadband (up 400Hz) increasing utilization from amplifier transducer. Firstly, load characteristic and operation principle of SAIMN are introduced mathematically. Secondly, parameter design method provided...
Aiming at the problem of excessive short-circuit current in traditional bridge structure, an improved hybrid-bridge DC-DC converter topology is proposed this article. The high voltage side a structure and low (LV) half-bridge double-winding which can suppress rising trend current. Compared with conventional four-level control for five-level to improve efficiency while works wide range. Minimum stress, smaller reactive power, zero-voltage-switching (ZVS) range be achieved strategy. In...
Abstract The underwater acoustic transducer (UAT) generates a large amount of reactive power during the operation, greatly limiting output capability amplifier. It is necessary to match UAT and improve its load characteristics. conventional design methods are not powerful enough solve nonlinear or parameter‐sensitive problems, lacking convergence ability for network problem. This article proposes an optimization method LCCLC impedance matching based on improved chaos algorithm corresponding...
In vehicle-grid-home (VGH) systems, bidirectional wireless power transfer (BD-WPT) systems are gaining popularity, which offers considerable advantages in terms of safety and convenience. However, both nonlinear household appliances EV charging system can easily cause the quality problems such as low factor, harmonic pollution, etc. A new versatile interface (VW-VGH-PI) topology is proposed, comprising a control converter (PQCC) between grid (WPT) system. New operating modes for VW-VGH-PI...
In order to solve the multipath effect and non-ideal channel characteristics for unmanned aerial vehicle data link, this paper introduces design of adaptive cascaded equalizer its FPGA implementation. By cascading constant modulus algorithm (CMA) equalizer, digital phase locked loop (PLL) decision feedback (DFE), achieves convergence through two manageable independent stages optimize equalization. Test results show that compared traditional equalizers, can track variation rapidly has high...
DV-Hop algorithm is a classical range-free localization used for node locating of wireless sensor network.After analyzing the principle and limitation ， authors proposed an improved algorithm．The new cluster strategy to reduce communication cost grouping conflict probability in first stage，and quasi-Newton optimization method was instead least-square estimate position nodes．Simulation made by using Matlab7.0，and results show that can greatly improve accuracy unknown nodes without increasing...
Coupling coefficient of a magnetic coupler is key factor that affects the efficiency wireless charging system.DD-type couplers have most common topology in literature.However, they low coupling coefficients.In order to obtain high coupler, firstly, circuit models DD-type and solenoid-type commonly adopted electric vehicles are built this paper.Secondly, hybrid DD-solenoid type coil winding proposed based on analytical model, optimized design core shielding structure also introduced...
A high frequency voltage standard of NIM from 30 kHz to MHz is designed based on thermal converters. In this standard, seven TVCs different sizes are used cover the range 0.1 V a maximum 100 with UHF vacuum thermocouples and non-inductive resistors. The new high-frequency has been shown have an accuracy 0.01% at 1 by comparing it low-frequency standard. Comparisons commercial TVC suggest 0.05% 10 0.1% MHz.
Network isolation system (NIS) can help electrical vehicle charging station (EVCS) toexchange messages with different systems (such as central monitor system, battery package and (EV)) in a secure efficient way.This paper focuses on the structure of EVCS, then analyzes boundaries trusted untrusted areas.On top boundary, EVCS communicate system.On bottom EVs or packages.Based this demarcation, proposes NIS architecture for EVCS.The new limit top/bottom boundary to enhance securities.Finally,...
Abstract In this paper, an open‐circuit fault‐tolerant topology of LC ‐coupling hybrid active power filter ( ‐HAPF) and its control strategy are proposed at the switch level, which can greatly improve reliability system. The structure has a contactor between midpoint each bridge arm negative bus dc‐link capacitor. When single‐phase fault occurs, ‐HAPF be reconstructed into three‐phase four‐switch system to compensate for harmonic reactive power, while quality compensation effect is hardly...
The efficiency of a wireless power transfer (WPT) system depends on the coupling coefficient coil, which is directly affected by coil winding method. In order to improve design optimization method for rectangular pad proposed. principle WPT and theory are first analysed, then three-dimensional model built in ANSYS/Maxwell optimal carried out terms turn-to-turn distance, number turns, start position size. experimental results show that optimized proposed this paper can maintain high...