光功率稳定性对光纤陀螺性能的影响研究

首先通过对数字闭环光纤陀螺的原理分析,推导出了光纤陀螺输入输出的关系式,结合随机游走系数的表达式,指出光功率稳定性的两种影响方式,一是引入白噪声,二是改变控制参数.然后建立了光纤陀螺控制模型,研究了光功率衰减与波动对系统调节时间和控制噪声的影响,同时针对光功率衰减对随机游走系数的影响,提出了动态调整最佳调制深度的优化方法.研究结果和优化控制方案对于高精度光纤陀螺的精度保持具有重要的实际意义.

Influence of optical power stability on fiber optic gyroscope performance

Firstly,the relationship between the input and output was derived through analyzing theory of the digital closed-loop fiber optic gyroscope. Combined with the formula of random walk coefficient,two influence ways of optical power stability were pointed out,namely white noise and changing controlling parameters. Secondly,the control model of fiber optic gyroscope was established,and the influence of optical power attenuation and fluctuation on the setting time and controlling noise was discussed. Also a method to choose the optimum modulation depth was proposed for the influence of optic power attenuation on random walk coefficient. Results and the optimized control schemes have important practical value to maintain the precision of high precision fiber optic gyroscope.