| 微机电陀螺解调过程中的噪声传递机理研究 |
| |
| 引用本文： | 林梦娜,崔 健,刘 凯.微机电陀螺解调过程中的噪声传递机理研究[J].导航定位于授时,2015(2):39-45. |
| |
| 作者姓名： | 林梦娜 崔 健 刘 凯 |
| |
| 作者单位： | 北京自动化控制设备研究所，北京100074,北京自动化控制设备研究所，北京100074,北京自动化控制设备研究所，北京100074 |
| |
| 摘 要： | 微机电陀螺的噪声性能是衡量陀螺综合性能的重要指标之一,不仅与陀螺本身机械结构有关,还与其测控电路有着密切联系。本文将通过理论推导计算出噪声经过乘法解调和开关解调时的传递机理,指出开关解调会使解调信号中的谐波成分和解调输入噪声向解调后的基带中进行混叠,相对于纯正弦解调会增大噪声,最后应用LabVIEW软件进行纯软件仿真和半实物仿真验证,并通过实际测试数据证明其正确性,为陀螺解调方案的选择提供依据。
|
| 关 键 词： | 微机电陀螺 噪声传递 乘法解调 开关解调 |
Research on Noise Transfer Mechanism of the Demodulation Operation in MEMS Gyroscope |
| |
| LIN Meng-n,CUI Jian and LIU Kai.Research on Noise Transfer Mechanism of the Demodulation Operation in MEMS Gyroscope[J].Navigation Positioning & Timing,2015(2):39-45. |
| |
| Authors: | LIN Meng-n CUI Jian and LIU Kai |
| |
| Institution: | Beijing Institute of Automatic Control Equipment, Beijing 100074, China,Beijing Institute of Automatic Control Equipment, Beijing 100074, China and Beijing Institute of Automatic Control Equipment, Beijing 100074, China |
| |
| Abstract: | The noise performance of the gyroscope is one of the most important factors of the performance of MEMS gyroscope. It is not only related with the mechanical structure, but also has an intimate connection with the circuits. This paper carries a comprehensive derivation on the noise transfer of the demodulation operation. The work compares the differences on noise transfer between multiplication demodulator and switching demodulator by decomposing the narrow-band Gaussian noise into the in-phase and orthogonal components. The results show that the noise located in the harmonic components of the carrier can be folded into the base band through the switching demodulator, increasing the noise compared to the pure sinusoid multiplication demodulation, which is verified via simulation and experiments. |
| |
| Keywords: | MEMS gyroscope Noise transfer Multiplication demodulation Switching demodulation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《导航定位于授时》浏览原始摘要信息 |
| 点击此处可从《导航定位于授时》下载免费的PDF全文 |
|
