| 一种改进的高精度硅微陀螺仪闭环驱动方案研究 |
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| 引用本文： | 杨波,周百令.一种改进的高精度硅微陀螺仪闭环驱动方案研究[J].宇航学报,2006,27(3):433-437,468. |
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| 作者姓名： | 杨波 周百令 |
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| 作者单位： | 东南大学仪器科学与工程系,南京,210096 |
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| 基金项目： | 高比容电子铝箔的研究开发与应用项目 |
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| 摘 要： | 提出了一种改进的高精度硅微陀螺仪闭环自激驱动方案。该方案对相角进行了优化控制，消除了驱动频率和驱动模态固有频率的相对频差影响，实现了闭环驱动的相角和增益条件的解耦。利用闭环回路中直流控制量与驱动力间的非线性关系，实现闭环自激控制。试验结果表明，1小时内，驱动频率变化的均方差为0．009Hz，相对变化量为2．2ppm；驱动幅度变化的均方差为0．0025mV，相对变化量为15ppm。由此可见，本方案使驱动频率和幅度稳定性得到了极大提高。
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| 关 键 词： | 硅微陀螺仪 闭环 自激驱动 解耦 |
| 文章编号： | 1000-1328（2006）03-0433-05 |
| 收稿时间： | 2005-09-28 |
| 修稿时间： | 2005-09-282006-01-23 |
A Precision Closed-loop Driving Scheme of Silicon Micromachined Vibratory Gyroscope |
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| YANG Bo,ZHOU Bai-ling.A Precision Closed-loop Driving Scheme of Silicon Micromachined Vibratory Gyroscope[J].Journal of Astronautics,2006,27(3):433-437,468. |
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| Authors: | YANG Bo ZHOU Bai-ling |
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| Institution: | Department of Instrument Science and Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | This paper describes a precision closed-loop drive scheme for Silicon Micromachined Vibratory Gyroscope(SMVG).It decouples the angle and gain of the self-oscillation-driven,optimizes the angle to reduce the relative difference between drive frequency and resonant frequency of the drive mode and achieves the closed-loop self-oscillation-driven by nonlinear relation between DC voltage using for control and drive force.The experiments show that the standard deviation of drive frequency is 0.009Hz,with relative drift 2.2ppm and the standard deviation of the amplitude is 0.0025mV,with relative drift 15ppm in one hour respectively.The closed-loop drive scheme improves the precision and stability of drive frequency and the amplitude of the gyroscope well. |
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| Keywords: | Silicon micromachined vibratory gyroscope(SMVG) Closed-loop Self-oscillation-driven Decouple |
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