中国激光, 2012, 39 (8): 0805002, 网络出版: 2012-06-25
谐振式集成光学陀螺三角波调制误差分析
Analysis of Triangle Wave Modulation Error in Integrated Optical Resonance Gyroscope
集成光学 谐振式集成光学陀螺 调制频率 调制峰峰值 调制误差 integrated optics integrated optical resonator gyroscope modulation frequency modulation amplitude modulation error
摘要
在基于模拟三角波相位调制技术的谐振式集成光学陀螺(IORG)调制方案中,调制三角波参数受外界环境等变化而产生波动是陀螺输出误差的主要来源之一。给出了调制三角波参数与陀螺输出的特性关系;分析了调制三角波参数波动与陀螺标度因数的变化关系;仿真计算了调制三角波参数波动与陀螺输出非线性度的关系。搭建了IORG实验系统,通过采用精密高频波形产生器产生调制三角波,得到了1 h零偏稳定性为0.69(°)/s,±500(°)/s动态范围内非线性度为0.96%的陀螺输出。实验验证了理论分析计算方法的正确性以及采用模拟三角波调制方法改善集成光学陀螺检测精度的可行性。
Abstract
A gyro output is influenced greatly by the fluctuation of a modulation triangle waveform in integrated optical resonator gyroscopes (IORG). The curve of scale factor K of the gyro with modulation waveform parameters (MWP) is induced. The influence on the output characteristics by MWP distortion is discussed. The relationship between the nonlinearity and MWP undulation is simulated. An IORG experimental system is carried out, and the triangle wave is generated by high-frequency waveform generator. Dynamic range of ±500(°)/s with nonlinearity of 0.96%, and bias drift of 0.69(°)/s with integration time of 1 s over 1 h are obtained. The testing result verifies correctness of the simulation.
粟妮, 冯丽爽, 雷明, 马迎建. 谐振式集成光学陀螺三角波调制误差分析[J]. 中国激光, 2012, 39(8): 0805002. Su Ni, Feng Lishuang, Lei Ming, Ma Yingjian. Analysis of Triangle Wave Modulation Error in Integrated Optical Resonance Gyroscope[J]. Chinese Journal of Lasers, 2012, 39(8): 0805002.