蜂巢盘共振器陀螺仪的0.003°/h偏差不稳定性,通过模式反转组合模式偏移控制方法实现
Liangqian Chen1, Qingsong Li2, Tongqiao Miao1
1National University of Defense Technology, Changsha, China.
Microsystems & nanoengineering
|August 12, 2025
概括
研究人员开发了一种用于微电子机械系统 (MEMS) 陀螺仪的新控制方法,显著减少偏差不稳定性和热漂移. 这一进步为MEMS陀螺仪提供了前所未有的精度,使高性能设备更容易获得.
科学领域:
- 机械工程 机械工程
- 电气工程 电气工程
- 传感器技术 传感器技术
背景情况:
- 高精度微电子机械系统 (MEMS) 陀螺仪对于各种应用至关重要.
- 现有的MEMS陀螺仪由于共振结构,制造和控制技术的精度受到限制,使偏差不稳定性低于0.01°/h变得罕见和昂贵.
- 偏差不稳定性和热漂移是当前MEMS陀螺仪技术的关键性能限制.
研究的目的:
- 通过结合电极加工和电容检测非线性错误,为MEMS陀螺仪开发一个更全面的偏差输出模型.
- 提出并验证一种新的控制方法,以提高陀螺仪的精度和稳定性.
- 为了实现偏差不稳定性,在MEMS陀螺仪中明显优于0.01°/h.
主要方法:
- 开发了一种先进的陀螺仪模型,其中包括电极加工错误和电容检测非线性错误.
- 提出了一种模式逆转组合模式偏移控制策略.
- 进行实验验证,将新方法与传统的强力再平衡模式进行比较.
主要成果:
- 新的控制方法显示,在-40°C至+60°C的温度范围内,偏差变化减少了595倍.
- 与传统方法相比,在室温下实现了偏差不稳定的6.3倍减少.
- 蜂圆盘共振器陀螺仪在8500s整合时间实现了0.003°/h的平均偏差不稳定性,代表了最先进的性能.
结论:
- 拟议的模式逆转组合模式偏移控制方法有效地减轻了热漂移,并减少了MEMS陀螺仪的偏移不稳定性.
- 实现的0.003°/h偏差不稳定性为MEMS陀螺仪性能设定了一个新的基准.
- 这项研究为开发更高精度的MEMS陀螺仪提供了一个新的范式,可能降低成本并扩大应用.
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