Design and application of gyro redundant installation in airborne electro-optical system
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摘要:
陀螺是光电系统瞄准线稳定的重要元器件，介绍了一种基于光电系统的光纤陀螺冗余安装方法。在冗余安装陀螺数量确定的前提下，考虑到工程实际应用的安装空间、体积、重量和成本等因素，设计了4个陀螺的八边形金字塔冗余安装方式，对此冗余安装方式的精度和可靠性进行了分析和仿真，并与无冗余安装进行了对比。同时，该安装方式可用于陀螺与磁流体动力学角速率传感器的冗余安装。结果表明，该方法使角速度测量的噪声标准差下降约25.3%，可靠性提升约1.75倍。该方法能有效解决某光电系统受安装空间限制而陀螺精度不够的问题，提升了光电系统可靠性；同时也可应用于三轴陀螺稳定光电系统中，对工程应用有一定的指导作用。
Abstract:The gyroscope is an important component for line-of-sight stabilization in electro-optical system. A redundant installation method of fiber optic gyroscope based on the electro-optical system was introduced. Under the premise that the number of redundant-installed gyroscope was determined, considering the installation space, volume, weight and cost of practical application of engineering, the redundant installation method of octagonal pyramid for 4 gyroscopes was designed. The precision and reliability of this redundant installation method were analyzed and simulated, and compared with the non-redundancy installation. This installation method could be used for redundant installation of gyroscope and magnetohydrodynamics angular rate sensor. The experimental results show that the standard deviation of noise is decreased about 25.3% and the reliability is improved about 1.75 times, which effectively solves the problem of insufficient gyroscope accuracy due to the limitation of installation space in an electro-optical system and improves the reliability. Meanwhile, the proposed method can be applied in the triaxial gyroscope stabilized electro-optical system, which has a certain guiding role for engineering application.
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Keywords:
- electro-optical system /
- fiber optic gyroscope /
- redundant installation /
- reliability
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图 1 光纤陀螺对称斜置冗余安装
Figure 1. Schematic diagram of symmetrical and oblique redundant installation of fiber optic gyroscopes
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图 4 陀螺测量值及叠加白噪声后信号图
Figure 4. Signal diagram of gyroscope measurement results and white noise superposition
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图 5 X轴速度波动与线性度对比图
Figure 5. Comparison curves of velocity fluctuation and linearity in X-axis
表 1 3轴信号标准差
Table 1 Triaxial standard deviation of signal
坐标轴 参考信号
标准差/(°·s−1)估计信号
标准差/(°·s−1)噪声
抑制率/%X 0.308 478 78 0.270 322 51 12.37 Y 0.329 151 02 0.284 831 31 13.46 Z 0.321 488 73 0.273 385 59 14.96 
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表 2 X轴测量数据表
Table 2 Measurement data results of X-axis
(°)/s 转台转速 冗余安装输
出数据标准差冗余安装
输出数据无冗余安装
数据标准差无冗余
安装数据60.0 0.024 6 60.664 5 0.035 1 58.800 6 30.0 0.022 8 30.357 8 0.030 1 29.480 1 10.0 0.021 8 10.126 3 0.028 5 9.837 9 1.0 0.021 1 1.070 5 0.028 4 1.147 5 0.1 0.021 2 0.158 0 0.027 9 0.263 7 −0.1 0.021 8 −0.036 3 0.028 8 0.074 5 −1.0 0.020 4 −0.950 1 0.027 8 −0.802 8 −10 0.021 1 −10.053 4 0.028 8 −9.599 3 −30 0.023 1 −30.265 3 0.031 6 −29.142 7 −60 0.025 2 −60.579 5 0.031 3 −58.451 4
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