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electro-mechanical coupling ANALYSIS OF MEMS STRUCTURES BY BOUNDARY ELEMENT METHOD

Acta Mechanica Sinica 2004年第2期20卷 185-191页

作者：张恺崔云俊熊春阳王丛舜方竞 Department of Mechanics and Engineering Science Peking UniversityBeijing 100871China

In this paper,we present the applications of Boundary Element Method(BEM) to simulate the electro-mechanical coupling responses of Micro-electro-mechanical systems(MEMS). The algorithm is programmed in our research group based on BEM modeling for electrostatics and *** agreement is shown while the simulation results of the pull-in voltages are compared with the theoretical/experimental ones for some examples.

关键词： MEMS boundary element method(BEM) electro-mechanical coupling

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Generalized Bleustein-Gulyaev type waves in layered porous piezoceramic structure

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Applied Mathematics and Mechanics(English Edition) 2015年第9期36卷 1223-1242页

作者： A.K.VASHISHTH A.DAHIYA V.GUPTA Department of Mathematics Kurukshetra University

The propagation of a Bleustein-Gulyaev （B-G） type wave in a structure consisting of multiple layers and a half-space of porous piezoelectric materials is theoreti- cally studied. The solutions of the problem in terms of the mechanical displacements and electric potential functions are obtained for each layer and the half-space. The dispersion equation is obtained for electrically open and shorted boundary conditions by use of the transfer matrix method. A peculiar kind of B-G waves is investigated, which can propagate only in the layer over the half-space. The relationship between the piezoelectric constants and the dielectric constants is found for the existence of a peculiar kind of propagation modes. The numerical results in terms of the phase velocity and the electromechanical coupling factor with different thicknesses of the layer stack are presented.

关键词： Bleustein-Gulyaev (B-G) type wave electro-mechanical coupling porouspiezoceramic transfer matrix

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Torsional vibration active control of hybrid construction machinery complex shafting

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Journal of Central South University 2014年第9期21卷 3498-3503页

作者：胡琼阳春华刘少军郑皓 College of mechanical and Electrical Engineering Central South University School of Information Science and Engineering Central South University

Due to the coaxial connection of engine, motor and pump, the dynamic characteristics of hybrid construction machinery are changed, which generates a new torsional vibration problem of multi-power sources. To reduce the torsional vibration of the hybrid construction machinery complex shafting, torsional vibration active control was proposed. The three-mass model of coaxial shafting of hybrid construction machinery was established. The PID control and the fuzzy sliding mode control were chosen to weaken torsional vibration by controlling the motor speed and torque. The simulation results show that the fuzzy sliding mode control has 12% overshoot of the PID control when the engine torque changes. The active control is effective and can realize smooth power switch.

关键词： torsional vibration active control hybrid construction machinery electro-mechanical coupling fuzzy sliding modecontrol

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Breathing cylindrical piezoelectric energy harvesters

Breathing cylindrical piezoelectric energy harvesters

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2011年全国压电和声波理论及器件应用研讨会

作者： Horn-sen TZOU StrucTronics and Control Lab.Department of Engineering Mechanics School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310027

＜正＞The concept of breathing piezoelectric energy harvester（BPEH） is proposed and evaluated in this paper.A thin cylindrical shell is chosen as the substructure of energy *** on the Kirchhoff-Love thin shell theor... 详细信息

关键词： Cylindrical shell electro-mechanical coupling Breathing mode Optimization

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