[1] Yang Bo, Zhou Bailing, Wang Shourong,. Quadrature error and offset error suppression circuitryfor silicon micro-gyroscope [J]. Journal of Southeast University (English Edition), 2008, 24 (4): 487-491. [doi:10.3969/j.issn.1003-7985.2008.04.018]
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Quadrature error and offset error suppression circuitryfor silicon micro-gyroscope(
)
硅微陀螺仪正交误差和失调误差抑制线路
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 24
- Issue:
- 2008 4
- Page:
- 487-491
- Research Field:
- Instrument Science and Technology
- Publishing date:
- 2008-12-30
Info
- Title:
- Quadrature error and offset error suppression circuitryfor silicon micro-gyroscope
- 硅微陀螺仪正交误差和失调误差抑制线路
- Author(s):
- Yang Bo, Zhou Bailing, Wang Shourong
- School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
- Keywords:
- silicon micro-gyroscope(SMG); quadrature error; offset error; closed-loop feedback; stability of zero bias
- PACS:
- U666.123
- DOI:
- 10.3969/j.issn.1003-7985.2008.04.018
- Abstract:
- The reasons for inducing quadrature error and offset error are analyzed and the expressions of quadrature error and offset error are induced.The open-loop system analysis indicates that, in order to avoid the appearance of harmonic peaks, the frequency difference δf between drive mode and sense mode must be less than 1/(2Qy).In order to eliminate the effects of the quadrature error and the offset error, as well as the inherent non-linearity in the capacitance-type sensors, a closed-loop feedback control circuit with quadrature correction is designed.The experimental results indicate that the quadrature error and offset error are corrected.By comparing with open-loop detection, the closed-loop feedback control circuit with quadrature correction decreases the non-linearity of the scale factor from 16.02% to 0.35%, widens the maximum rate capability from ±270(°)/s to ± 370(°)/s and increases the stability of zero bias from 155.2(°)/h to 60.6(°)/h.
- 分析了正交误差和失调误差产生的原因, 推导了正交误差和失调误差的表达式.开环系统分析表明, 为了避免开环系统出现谐振峰, 两模态(驱动模态与敏感模态)频差δf必须小于1/(2Qy).为了消除正交误差、失调误差及电容传感器自身非线性的影响, 设计了一个可实现正交误差校正的闭环反馈电路.实验结果表明, 正交误差和失调误差得到较好抑制.与开环检测相比, 闭环反馈回路将标度因数非线性从16.02%减少到0.35%, 将最大测量范围从±270(°)/s扩展到± 370(°)/s, 将零偏稳定性从155.2(°)/h提高到60.6(°)/h.
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Memo
- Memo:
-
Biography: Yang Bo(1979—), male, doctor, lecturer, yangbo20022002@163.com.
Citation: Yang Bo, Zhou Bailing, Wang Shourong.Quadrature error and offset error suppression circuitry for silicon micro-gyroscope[J].Journal of Southeast University(English Edition), 2008, 24(4):487-491.