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China Communications 2025年第2期22卷 226-240页

作者： Xie Zhigang Song Xin Xu Siyang Cao Jing School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China Engineering Optimization and Smart Antenna Research Institute Northeastern UniversityQinhuangdao 066004China College of Computer Science and Engineering Northeastern UniversityShenyang 110819China School of Mathematics and Information Science&Technology Hebei Normal University of Science and TechnologyQinhuangdao 066004China

Recently,one of the main challenges facing the smart grid is insufficient computing resources and intermittent energy supply for various distributed components(such as monitoring systems for renewable energy power stations).To solve the problem,we propose an energy harvesting based task scheduling and resource management framework to provide robust and low-cost edge computing services for smart ***,we formulate an energy consumption minimization problem with regard to task offloading,time switching,and resource allocation for mobile devices,which can be decoupled and transformed into a typical knapsack ***,solutions are derived by two different ***,we deploy renewable energy and energy storage units at edge servers to tackle intermittency and instability ***,we design an energy management algorithm based on sampling average approximation for edge computing servers to derive the optimal charging/discharging strategies,number of energy storage units,and renewable energy *** simulation results show the efficiency and superiority of our proposed framework.

关键词： edge computing energy harvesting energy storage unit renewable energy sampling average approximation task scheduling

energy harvesting in the Wake of An Inverted C-Shaped Bluff Body

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China Ocean Engineering 2024年第1期38卷 68-80页

作者： WANG Jun-lei LI Shen-fang Md.Mahbub ALAM ZHU Hong-jun HU Guo-biao School of Mechanical and Power Engineering Zhengzhou UniversityZhengzhou 450000China Center for Turbulence Control Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Internet of Things Thrust The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China

This paper proposes a novel wake-induced vibration(WIV)-based energy harvesting system consisting of two bluff *** inverted C-shaped bluff body is stationary installed at the upstream position to generate an interference wake street,and a cylinder bluff body equipped with a transducer is elastically suspended at the downstream position to harness WIV *** hydrodynamics and energy harvesting(EH)performance of the proposed system are investigated via experimental *** reduced velocity(U*)ranging from 2 to 14(the corresponding Reynolds number ranging from 15100 to 106200)is considered in the present *** is found that the wake generated by the inverted C-shaped bluff body significantly affects the EH *** the opening angle(α)of the C-shaped bluff body increases the vibration amplitude of the downstream cylinder,thereby increasing the harvested *** the spacing(L)between two bluff bodies is two times the cylinder diameter(D),the wake-induced vibration(WIV)mode is observed,while the combined WIV and wake galloping(WG)mode occurs whenαis 150°,and L equals 3D or *** average drag coefficient becomes negative when L is 2D,3D,or *** carefully configuring a C-shaped bluff body,the wake generated by it can bring an augmenting effect on the vibration of the downstream EH *** example,the RMS power output of the proposed EH system reaches a maximum of 0.31 W at U*=8 and L=4D,which is 300%greater than that of its traditional ***,after a number of case stud-ies,it is identified that the proposed EH system can achieve the best performance whenαis 150°and L=2D.

关键词： wake-induced vibration vortex-induced vibration galloping energy harvesting bluff body

energy harvesting and speed sensing with a hybrid rotary generator for self-powered wireless monitoring

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Acta Mechanica Sinica 2024年第9期40卷 116-130页

作者： Zhixia Wang Hongyun Qiu Xuanbo Jiao Wei Wang Qichang Zhang Ruilan Tian Dongxing Cao School of Mechanical Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Nonlinear Dynamics and Control Tianjin 300350China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China Department of Mechanics Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China

Real-time onboard health monitoring systems are critical for the railway industry to maintain high service quality and operational ***,the issue with power supplies for monitoring sensors persists,especially for freight trains that lack onboard ***,we propose a hybrid piezoelectric-triboelectric rotary generator(HPT-RG)for energy harvesting and vehicle speed *** HPT-RG incorporates a rotational self-adaptive technique that softens the equivalent stiffness,enabling the piezoelectric non-resonant beam to surpass resonance limitations in a low-frequency *** experiments demonstrate the feasibility of using the HPT-RG as an energy harvesting module to collect the rotational energy of the freight rail transport and power the wireless temperature *** allow multiple monitoring in confined spaces on trains,a triboelectric sensing module is added to the HPT-RG to sense the operation speed and mileage of ***,the generator exhibits favorable mechanical durability under more than 600 h of official testing on the train bogie *** proposed HPT-RG is essential for creating a truly self-powered,maintenance-free,and zero-carbon onboard wireless monitoring system on freight railways.

关键词： energy harvesting Speed sensing Rotational self-adaptive technique Low-frequency Self-powered wireless monitoring

Science Letters:energy harvesting with a slotted-cymbal transducer

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1187-1190页

作者： Jiang-bo YUAN Xiao-biao SHAN Tao XIE Wei-shan CHEN Department of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China

A cymbal transducer is made up of a piezoceramic disk sandwiched between two dome-shaped metal *** circumferential stresses caused by flexural motion of the metal endcaps can induce the loss of mechanical input *** element analysis shows that the radial slots fabricated in metal endcaps can release the circumferential stresses,and reduce the loss of mechanical input energy that could be converted into electrical *** this letter,the performance of a slotted-cymbal transducer in energy harvesting was *** results show that the output voltage and power of the cymbal are improved.A maximum output power of around 16 mW could be harvested from a cymbal with 18 cone radial slots across a 500 kΩ resistive load,which is approximately 0.6 times more than that of the original cymbal transducer.

关键词： Piezoelectric Cymbal transducer energy harvesting

energy harvesting for Self-Powered Nanosystems

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Nano Research 2008年第1期1卷 1-8页

作者： Zhong Lin Wang School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

In this article,an introduction is presented about the energy harvesting technologies that have potential for powering *** discussion mainly focuses on the approaches other than the well-known solar cell and *** mainly introduce the piezoelectric nanogenerators developed using aligned ZnO nanowire *** is a potential technology for converting mechanical movement energy(such as body movement,muscle stretching,blood pressure),vibration energy(such as acoustic/ultrasonic wave),and hydraulic energy(such as fl ow of body fl uid,blood fl ow,contraction of blood vessel,dynamic fl uid in nature)into electric energy for self-powered nanosystems.

关键词： Nanogenerator self-powered nanosystem energy harvesting

energy harvesting performance of viscoelastic polyacrylic dielectric elastomers

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International Journal of Smart and Nano Materials 2015年第3期6卷 162-170页

作者： Junshi Zhang Yongquan Wang Hualing Chen Bo Li State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an 710049China School of Aerospace Xi’an Jiaotong UniversityXi’an 710049China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China

Viscoelasticity dissipates the mechanical energy,leading to a reduction of energy conversion efficiency in both dielectric elastomer(DE)actuators and *** measuring the uniaxial tension-recovery experiments of very-high-bond-based DE,this article quantitatively presents the effect of viscoelasticity on energy harvesting performance of DE *** employing a DE strip energy harvester with constant surface charge,an analytical model is established to calculate the generated electrical energy and energy conversion *** results demonstrate that viscoelasticity has a significant influence on DE energy harvesting performance.

关键词： dielectric elastomer viscoelasticity energy harvesting

A review of nonlinear piezoelectric energy harvesting interface circuits in discrete components

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 1001-1026页

作者： Bin ZHANG Hongsheng LIU Shengxi ZHOU Jun GAO School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209Shandong ProvinceChina School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China

Piezoelectric energy harvesting is considered as an ideal power resource for low-power consumption gadgets in vibrational *** energy extraction efficiency depends highly on the interface circuit,and should be highly improved to meet the power *** nonlinear interface circuits in discrete components have been extensively explored and developed with the advantages of easy implementation,stable operation,high efficiency,and low *** paper reviews the state-of-the-art progress of nonlinear piezoelectric energy harvesting interface circuits in discrete ***,the working principles and the advantages/disadvantages of four classical interface circuits are ***,the improved circuits based on the four typical circuits and other types of circuits are introduced in detail,and the advantages/disadvantages,output power,efficiency,energy consumption,and practicability of these circuits are ***,the future development trends of nonlinear piezoelectric energy harvesting circuits,e.g.,self-powered extraction,low-power consumption,and broadband characteristic,are predicted.

关键词： piezoelectric nonlinear energy harvesting discrete component interface circuit

Soft-bionic-fishtail structured triboelectric nanogenerator driven by flow-induced vibration for low-velocity water flow energy harvesting

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Nano Research 2023年第1期16卷 466-472页

作者： Sheng Zhang Zhaoxu Jing Xinxian Wang Mingkang Zhu Xin Yu Jianyang Zhu Tinghai Cheng Hongwei Zhao Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Institute of Robotics and Intelligent Systems Wuhan University of Science and TechnologyWuhan 430081China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia30332-0245USA School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130022China

To adapt to the low-velocity water flow closely related to human life,the natural energy can be efficiently harvested and used to power monitoring ***,a triboelectric soft fishtail(TE-SFT)driven by flow-induced vibration(FIV)effect is proposed based on the soft material synthesis ***,inspired by the fishtail fin,a bluff body with the cross-section of fishtail-shaped is designed,and has a preferable vortex effect by fluid *** power generation part,the triboelectric nanogenerator(TENG)is designed to act as an inertial pendulum structure by geometric *** the FIV effect,the TESFT driven by fishtail-shaped bluff body swings like a fish in the water and then brings the inertial pendulum to acquire the oscillation for harvesting energy from low-velocity water *** TE-SFT attains an open-circuit voltage(VOC)of 200 V to 313 V at the flow velocities of 0.24 to 0.89 m/***,after 30 days of water immersion,the VOC of TE-SFT retains 96.81%.In demonstration,the TE-SFT is applied to power the temperature and humidity sensor through harvesting water flow *** work also provides a way for self-powered system based on the TENG and soft bionic fish in water environment.

关键词： low-velocity water flow flow-induced vibration soft fishtail triboelectric nanogenerator energy harvesting

A unified approach of energy and data cooperation in energy harvesting WSNs

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Science China(Information Sciences) 2018年第8期61卷 170-182页

作者： Roomana YOUSAF Rizwan AHMAD Waqas AHMED Fu-chun ZHENG School of Electrical Engineering and Computer Science National University of Sciences and Technology Department of Electrical Engineering Pakistan Institute of Engineering and Applied Sciences School of Electronic and Information Engineering Harbin Institute of Technology

energy harvesting(EH) provisioned wireless sensor nodes are key enablers to increase network life time in modern wireless sensor networks(WSNs). However, the intermittent nature of the EH process necessitates management of nodes’ limited data and energy buffer capacity. In this paper, a unified mathematical model for a cooperative EHWSN with an opportunistic relay is presented. The energy and data causality constraints are expressed in terms of throughput, available energy, delay and transmission *** finite energy buffers, data buffers and discrete transmission rates(as defined in the standard IEEE 802.15.4) at the nodes, different intuitive online power allocation policies at the relay are *** results show that a policy achieving high throughput is less fair and vice versa. Therefore, a joint rate and power allocation policy(JRPAP) is proposed in this study which provides a better trade off between fairness, throughput and energy over intuitive policies. Based on the JRPAP results, we propose to use data aggregation(DA) to achieve throughput gain at lower buffer sizes. In addition, the notion of energy aggregation(EA) is introduced to achieve throughput gain at higher buffer sizes. Combining both EA and DA further improves the overall throughput at all buffer sizes.

关键词： energy harvesting energy causality data causality energy aggregation data aggregation opportunistic relay

Advances in Triboelectric Nanogenerators for Blue energy harvesting and Marine Environmental Monitoring

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Engineering 2024年第2期33卷 204-224页

作者： Yang Jiang Xi Liang Tao Jiang Zhong Lin Wang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro–Nano Energy and SensorsBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Georgia Institute of Technology AtlantaGA 30332USA

Blue energy,which includes rainfall,tidal current,wave,and water-flow energy,is a promising renewable resource,although its exploitation is limited by current technologies and thus remains *** form of energy is mainly harvested by electromagnetic generators(EMGs),which generate electricity via Lorenz force-driven electron *** nano genera tors(TENGs)and TENG networks exhibit superiority over EMGs in low-frequency and high-entropy energy harvesting as a new approach for blue energy harvesting.A TENG produces electrical outputs by adopting the mechanism of Maxwell’s displacement *** date,a series of research efforts have been made to optimize the structure and performance of TENGs for effective blue energy harvesting and marine environmental *** the great progress that has been achieved in the use of TENGs in this context so far,continuous exploration is required in energy conversion,device durability,power management,and environmental *** review reports on advances in TENGs for blue energy harvesting and marine environmental *** introduces the theoretical foundations of TENGs and discusses advanced TENG prototypes for blue energy harvesting,including TENG structures that function in freestanding and contact-separation *** enhancement strategies for TENGs intended for blue energy harvesting are also ***,marine environmental applications of TENGs based on blue energy harvesting are discussed.

关键词： Triboelectric nanogenerator TENG networks Blue energy energy harvesting Ocean sensors