高精度光纤陀螺响应角加速度能力研究

Research on Response Angle Acceleration of High-precision FOG

针对高精度光纤陀螺采用过调制技术进行噪声抑制,会对其响应角加速度能力产生影响的问题,首先在数字闭环光纤陀螺的动态数学模型基础上,对在大角加速度情况下光纤陀螺发生饱和输出现象进行机理分析。其次,理论推导出光纤陀螺饱和输出对应的角速度临界值。最后,采用光纤陀螺角加速度响应能力动态测试方法,得出实验用光纤陀螺响应角加速度值和输出饱和时角加速度值。验证实验表明,不同光纤陀螺响应角加速度值和输出饱和时角加速度值具有一致性。

High-precision Fiber Optic Gyroscope (FOG) uses over-modulation technology to reduction the noise, which will influence its ability to response to angle acceleration.Firstly, based on dynamic mathematical model of closed-loop FOG, the saturation output phenomenon of FOG under the condition of large angle acceleration is analyzed.Theoretical deduce critical angular velocity of FOG saturation output.Finally, by means of dynamic testing method of FOG angle acceleration response capability, FOG angle acceleration and saturation angle acceleration are obtained.Experiment shows that different FOG angle acceleration and saturation angle acceleration have consistency.