模拟和优化半球共振器的等价底角,用于频率分割抑制.
Zhiyong Gao1,2, Shang Wang3, Zhi Wang1,3
1School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (UCAS), Hangzhou 310012, China.
Micromachines
|September 28, 2023
概括
通过优化结构参数,半球共振器陀螺的频率分裂被最小化. 这项研究优化了相当的底角,提高了航空航天和导航应用的陀螺准确性.
科学领域:
- 机械工程 机械工程
- 航空航天工程 航空航天工程
- 传感器技术 传感器技术
背景情况:
- 半球共振器陀螺仪 (HRGs) 提供高精度,可靠性和寿命,这对于航空航天和导航至关重要.
- 由共振器缺陷引起的频率分裂是限制HRG精度的主要错误来源.
- 结构设计,特别是相当的底角,显著影响频率分割.
研究的目的:
- 通过优化结构参数来抑制平面电极型HRG中的频率分割.
- 理论分析和模拟等价底角对共振器振动模式的影响.
- 确定最佳的结构参数,以提高HRG的准确性和性能.
主要方法:
- 薄外理论应用于模拟4个极振动模式和波形前行.
- 在各种边界条件下对等底角对振动模式频率的影响的理论分析和模拟.
- 中心复合设计用于优化等效底角参数 (茎直径D,片半径R1,R2) 以频率值和质量灵敏度作为响应.
主要成果:
- 相当的底角通过辐射约束影响4个极的振动模式.
- 优化的参数 (D=7mm,R1=1mm,R2=0.8mm) 产生了4个极振动模式的频率为5441.761赫兹.
- 优化的设计实现了3.91Hz/mg的质量灵敏系数,满足工作和激发要求.
结论:
- 优化等效底角和相关结构参数有效地抑制了HRG中的频率分割.
- 该研究提供了一种经过验证的方法,通过结构设计优化来提高HRG的准确性.
- 这些发现为开发更精确,更可靠的惯性导航系统提供了指导.
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