National Changhua University of Education Institutional Repository : Item 987654321/13775
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题名: Nonlinear Dynamic Behavior Analysis of Micro Electrostatic Actuator based on a Continuous Model Under Electrostatic Loading
作者: Chen, Cha'o-Kuang;Liu, Chin-Chia;Lai, Hsin-Yi
贡献者: 工業教育與技術學系
关键词: Differential transformation;Finite difference method;Hybrid method;MEMS;Microelectrostatic device
日期: 2011-05
上传时间: 2012-08-27T10:53:39Z
出版者: American Society of Mechanical Engineers(ASME)
摘要: Analyzing the dynamic behavior of microelectrostatic devices is problematic due to the complexity of the interactions between the electrostatic coupling effect, the fringing field effect, the residual stress, the tensile stress, and the nonlinear electrostatic force. In this study, this problem is resolved by modeling the electrostatic system using a continuous model and solving the resulting governing equation of motion using a hybrid scheme comprising the differential transformation method and the finite difference method. The feasibility of the proposed approach is demonstrated by modeling the dynamic responses of two fixed-fixed microbeams when actuated by a dc voltage. It is shown that the numerical results for the pull-in voltage deviate by no more than 1.74% from those presented in the literature. The hybrid scheme is then applied to examine the nonlinear behavior of one clamped microbeam actuated by a combined dc/ac scheme. The beam displacement is analyzed as a function of both the magnitude and the frequency of the ac voltage. Finally, the actuating conditions, which ensure the stability of the microbeam, are identified by reference to phase portraits and Poincaŕ maps. Overall, the results presented in this study show that the hybrid differential transformation and finite difference method provides a suitable means of analyzing a wide variety of common electrostatically actuated microstructures.
關聯: ASME Journal of Applied Mechanics, 78(3): 031003
显示于类别:[工業教育與技術學系] 期刊論文

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