摘要
从理论上分析静电梳齿微谐振器的机械力学特性,给出了活动梳齿的横向谐振频率解析解。鉴于目前静电微谐振器模拟仿真中存在的问题,提出利用基于MAST语言实现的MEMS宏模块建立微谐振器系统级通用仿真模型,为验证外围电路提供了基础。仿真结果与理论模态分析相一致,验证了模型的有效性。通过谐振频率对结构参数的敏感性分析为优化谐振器性能提供基础,使工作模态远离其他高阶模态;合理安排激励电极,抑制一阶模态扰动。敏感性仿真表明:在横向振动微谐振器中,工作模态谐振频率随梁长的增加而减小;随梁宽的增加而增大;结构层厚度对横向振动频率没有影响;梳齿部分所有参数的变化造成频率的反向变化。
According to the description of the dynamic of the electrostatic comb micro-resonators, the system level universal parameter model is built. The model is a micro model consisted of some sub-blocks based on MAST langue. It can verify the ability of the peripheral circuit and decrease computational cost obviously. Appropriate parameter value is chosen based on mode analysis and structure sensitivity analysis so that the work resonant frequency can far from the higher order resonant frequency. Making use of symmetry electrode can restrain the lower order perturbation. It is discovered that the work resonant frequency lessen slightly as the length of the DETF beam increasing, but the opposite with the variation of its width and all parameters of the comb. The height of the DETF beam is unrelated to the work resonant frequency.
出处
《传感器与微系统》
CSCD
北大核心
2009年第7期82-85,共4页
Transducer and Microsystem Technologies
基金
"十五"国防预研基金资助项目
关键词
静电梳齿微谐振器
参数模型
谐振频率
灵敏度分析
electrostatic comb micro-resonators
parameter model
resonant frequency
sensitivity analysis
