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electromechanical coupling properties of a self-powered vibration sensing device for near-surface observation tower monitoring

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Science China(Technological Sciences) 2022年第7期65卷 1545-1557页

作者： MU JiLiang HE HuiCheng MU JinBiao HE Jian SONG JinSha HAN XiaoTao FENG ChengPeng ZOU Jie YU JunBin CHOU XiuJian Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China Sichuan Aerospace Fenghuo Servo Control Technology Corporation Chengdu 610000China

The wind-induced vibration of a remote sensing tower is the key factor affecting the stability of image sensing and structural reliability. Monitoring the vibration of a long-time unattended tower is critical to its proper operation. Currently, most monitoring devices are supplied with wired power or battery, significantly limiting their practical applications in remote areas. In this paper,a self-powered vibration sensing device based on hybrid electromechanical conversion mechanisms is proposed. The device depends on a cylindrical magnetic levitation structure sensitive to ambient vibration for transferring mechanical energy and is taken as a dual-functional heterogeneous integrated system comprising electromagnetic, piezoelectric, and triboelectric generators. When the device vibrates under environmental force driving, the suspension magnet reciprocates vertically and generates induced electromagnetic energy, which is used to power the device. Moreover, the triboelectric and piezoelectric voltages,respectively originating from magnet impact on two separation friction materials and magnetic field repulsion-induced strain deformation of a piezoelectric sheet, are used as the synergistic sensing signals. To improve the output energy, a set of dualsegmented annular coils is designed in an electromagnetic generator, which greatly avoids the obstructive effect of the suspended magnet on the magnetic flux change at its end. Compared with a whole isochoric coil, it increases the output voltage by 78.3%.For the triboelectric sensing module, a silicone film with a large specific surface area is fabricated via 3D modification, which improves the output voltage by 29.4%. Furthermore, a pair of piezoelectric sensing modules is set to improve the accuracy of comparative sensing data. The experimental measurement shows that the device maintains a high sensitivity of 6.711 V(m s;);and excellent linearity of 0.991 in the range of 0–14 m s;. This work provides a practical strategy for the vibration monitoring of remote sensing

关键词： remote sensing tower electromechanical coupling synergistic sensing magnetic levitation vibration online monitoring

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electromechanical coupling MODEL AND ANALYSIS OF TRANSIENT BEHAVIOR FOR INERTIAL RECIPROCATION MACHINES

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Applied Mathematics and Mechanics(English Edition) 2005年第11期26卷 1499-1505页

作者：胡继云殷学纲于翠萍 ZHANG Ru-qing School of Mechanical and Electrical Engineering Henan University of Technology Zhengzhou 450052 P.R. China Department of Engineering Mechanics Chongqing University Chongqing 400044 P. R. China College of Bioengineering Henan University of Technology Zhengzhou 450052 P. R. China 不详

The dynamical equations for a inertial reciprocating machine excited by two rotating eccentric weights were built by the matrix methodology for establishing dynamical equations of discrete systems. A mathematical model of electromechanical coupling system for the machine was formed by combining the dynamical equations with the state equations of the two motors. The computer simulation to the model was performed for several values of the damping coefficient or the motor power, respectively. The substance of transient behavior of the machine is unveiled by analyzing the results of the computer simulation, and new methods are presented for diminishing the transient amplitude of the vibrating machine and improving the transient behavior. The reliable mathematical model is provided for intelligent control of the transient behavior and engineering design of the equipment.

关键词： inertial reciprocating machine electromechanical coupling matrix method transient behavior

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Stability and Hopf bifurcation of a nonlinear electromechanical coupling system with time delay feedback

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Chinese Physics B 2015年第1期24卷 345-353页

作者：刘爽赵双双王兆龙李海滨 Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University

The stability and the Hopf bifurcation of a nonlinear electromechanical coupling system with time delay feedback are studied. By considering the energy in the air-gap field of the AC motor, the dynamical equation of the electromechanical coupling transmission system is deduced and a time delay feedback is introduced to control the dynamic behaviors of the system. The characteristic roots and the stable regions of time delay are determined by the direct method, and the relationship between the feedback gain and the length summation of stable regions is analyzed. Choosing the time delay as a bifurcation parameter, we find that the Hopf bifurcation occurs when the time delay passes through a critical value.A formula for determining the direction of the Hopf bifurcation and the stability of the bifurcating periodic solutions is given by using the normal form method and the center manifold theorem. Numerical simulations are also performed, which confirm the analytical results.

关键词： electromechanical coupling time delay Hopf bifurcation stability

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Bifurcation and chaos analysis of a nonlinear electromechanical coupling relative rotation system

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Chinese Physics B 2014年第9期23卷 271-277页

作者：刘爽赵双双孙宝平张文明 Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University

Hopf bifurcation and chaos of a nonlinear electromechanical coupling relative rotation system are studied in this paper. Considering the energy in air-gap field of AC motor, the dynamical equation of nonlinear electromechanical coupling relative rotation system is deduced by using the dissipation Lagrange equation. Choosing the electromagnetic stiffness as a bifurcation parameter, the necessary and sufficient conditions of Hopf bifurcation are given, and the bifurcation characteristics are studied. The mechanism and conditions of system parameters for chaotic motions are investigated rigorously based on the Silnikov method, and the homoclinic orbit is found by using the undetermined coefficient method. Therefore, Smale horseshoe chaos occurs when electromagnetic stiffness changes. Numerical simulations are also given, which confirm the analytical results.

关键词： relative rotation electromechanical coupling Hopf bifurcation chaos

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Characteristic of Torsional Vibration of Mill Main Drive Excited by electromechanical coupling

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Chinese Journal of Mechanical Engineering 2016年第1期29卷 180-187页

作者： ZHANG Yifang YAN Xiaoqiang LIN Qihui Institute of Mechanical Engineering University of Science and Technology Beijing School of Mechanical Engineering Anhui University of Technology

In the study of electromechanical coupling vibration of mill main drive system, the influence of electrical system on the mechanical transmission is considered generally, however the research for the mechanism of electromechanical interaction is lacked. In order to research the electromechanical coupling resonance of main drive system on the F3 mill in a plant, the cycloconverter and synchronous motor are modeled and simulated by the MTLAB/SIMUL1NK firstly, simulation result show that the current harmonic of the cycloconverter can lead to the pulsating torque of motor output. Then the natural characteristics of the mechanical drive system are calculated by ANSYS, the result show that the modal frequency contains the component which is close to the coupling vibration frequency of 42Hz. According to the simulation result of the mechanical and electrical system, the closed loop feedback model including the two systems are built, and the mechanism analysis of electromechanical coupling presents that there is the interaction between the current harmonic of electrical system and the speed of the mechanical drive system. At last, by building and computing the equivalent nonlinear dynamics model of the mechanical drive system, the dynamic characteristics of system changing with the stiffness, damping coefficient and the electromagnetic torque are obtained. Such electromechanical interaction process is suggested to consider in research of mill vibration, which can induce strong coupling vibration behavior in the rolling mill drive system.

关键词： rolling mill vibration current harmonic speed oscillation electromechanical coupling vibration characteristic

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Surface electromechanical coupling on DLC Film with Conductive Atomic Force Microscope

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Plasma Science and Technology 2004年第3期6卷 2342-2345页

作者：朱守星丁建宁范真李长生蔡兰杨继昌 Schcool of Mechanical Engineering Donghua University Shanghai 200051 China 2 Micro/Nano Science and Technology Research Center JiangSu University Zhen-jiang 212013 China

Diamond-like carbon (DLC) film composed of microscopically insulation but microscopically a mixture of conducting (sp2) and insulating (sp3) phases was discussed on the local modification with a conductive atomic force microscope (C-APM). Especially, a topographic change was observed when a direct current (DC) bias-voltage was applied to the DLC film. Experimental results show that a nanoscale pit on DLC surface was formed when applying a positive 25 V on DLC film. According to the interacting force between CoCr-coated microelectronic scanning probe (MESP) tip and DLC surface, as well as the Sondheimer oscillation theory, the 'scalewing effect' of the pit was explained. electromechanical coupling on DLC film suggested that the depth of pits increased with an increase of load applied to surface when the cantilever-deflected signal was less than a certain threshold voltage.

关键词： atomic force microscope diamond-like carbon surface modification electromechanical coupling

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Simulation Analysis of electromechanical coupling for Unmanned Aerial Vehicle Cabin Door System

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World Journal of Engineering and Technology 2023年第4期11卷 1012-1018页

作者： Bangjian Wang Xiaohang Hu Hong Nie College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing China

In order to study the dynamic response of the unmanned aerial vehicle cabin door opening and closing system under impact load conditions, considering the flexible treatment of mechanical components, and the system’s motion with different stiffness of energy-absorbing components, a rigid-flexible coupling model of the cabin door actuation system was established in LMS. Virtual. Motion. In Amesim, a control model of the motor was created. Through the Motion-Amesim co-simulation module, the dynamic module of the system was combined with the motor control module to complete the electromechanical coupling simulation and analyze the results. .

关键词： Unmanned Aircraft Cabin Door electromechanical coupling Virtual Prototype Dynamic Characteristics

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CHARACTERISTICS OF STRENGTH CONTROL OF ADAPTIVE STRUCTURE WITH electromechanical coupling

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Acta Mechanica Solida Sinica 2002年第1期15卷 49-61页

作者： Sui Yunkang Shao jianyi College of electromechanical Engineering Beijing Polytechnic UniversityBeijing 100022China Department of Engineering Mechanics Dalian University of TechnologyDalian 116023China

Based on the programming method, an electromechanical coupling adaptive statically indeterminate truss structure is controlled for increasing its load capacity. Several main parameters during the process of design of the adaptive structure are selected for a study of its characteristic during the control stage. The curves of each parameter for the effect of control results are plotted and corresponding conclusions are drawn. Thus, the theoretical basis is presented for optimal design, manufacture and control of the adaptive structure.

关键词： adaptive structure strength control characteristic research electromechanical coupling selection of parameters

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FREE VIBRATION ANALYSIS OF PRE-STRETCHED PLATES WITH electromechanical coupling

FREE VIBRATION ANALYSIS OF PRE-STRETCHED PLATES WITH ELECTRO...

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2013全国压电和声波理论及器件技术研讨会

作者： Yanzheng WANG Xiangyu LI Weiqiu CHEN School of Mechanics and Engineering Southwest Jiaotong University Department of Engineering Mechanics Zhejiang University

With the development of soft electro-active materials,their electromechanical coupling behaviors have become a focus of intense research interest in fields of mechanics and related engineering disciplines.However,the complexity associated with multi-field coupling is further convoluted with the nonlinearity caused by finite deformation,making the problems very difficult to be solved.In this study,the free vibration of a simply-supported pre-stretched rectangular plate with electromechanical coupling is considered.An exact three-dimensional solution is derived based on the linearized biasing theory proposed by Dorfmann and Ogden,using the new state-space formulations.In contrast to the conventional state-space formulations,two displacement functions and two stress functions are introduced to express the two in-plane displacements and two transverse shear stresses respectively.Thus,two decoupled state equations of lower order are derived,which correspond to different deformation modes.Numerical examples are considered to illustrate the effects of various parameters on the natural frequencies of the plate.Particular phenomena observed from the numerical results,e.***.the electromechamcal coupling,the size-increasing induced softening and the stretch induced stiffening,are discussed.

关键词： Soft electro-active material electromechanical coupling Free vibration Exact solution State-space formulations

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Research on electromechanical coupling and Bending-Torsion Vibration of the Belt Driver Mechanism

Research on Electromechanical Coupling and Bending-Torsion V...

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第二十九届中国控制会议

作者： LI Gaofeng,YANG Zhi-An1,XIN Jing21.Key Laboratory of Structure and Vibration Engineering of Tangshan and Tangshan College,Tangshan 063000,P.R.China 2.College of Mechanical Engineering,Hebei Polytechnic University,Tangshan 063009,P.R.China

The belt driver mechanism of the electromechanical coupling and bending-torsion coupled nonlinear vibration differential equations are established according to Lagrange-Maxwell equation and the numerical analysis are carried out.States of the nonlinear characteristics of electromechanical coupling system are analyzed by means of Runge-Kutta method.The phase diagram,time response,frequency map and axis trajectory are received.There is obvious unstable phenomena when motor in state of rated operation.The effect of torsional vibration on motor is not obvious.

关键词： Belt Nonlinear Vibration The Method of Multiple Scales electromechanical coupling

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