基于傅里叶变换的光纤陀螺测试环境自评估技术

Self-Assessment Technique for Fiber Optic Gyroscope Test Environment Based on Fourier Transform

提出了一种基于傅里叶变换的光纤陀螺(FOG)测试环境自评估技术。测试结果表明,FOG零偏稳定性由环境3中的0.0015 (°)/h(100 s, 1σ)(数据100 s平滑后的标准差)降低到环境4中的0.0019 (°)/h (100 s, 1σ);随机游走系数由环境3中的2.1565×10^(-4)(°)/h^(1/2)降低到环境4中的2.8876×10^(-4)(°)/h^(1/2)。对另一只脉冲输出的陀螺进行了不同环境下的测试,零偏稳定性由环境3中的0.0013 (°)/h (100 s, 1σ)降低到环境4中的0.0021 (°)/h (100 s, 1σ)。通过两只陀螺的实验,验证了所提自评估技术的有效性,为高精度FOG的精度测试提供了指导。

A self-assessment technique based on Fourier transform is presented to evaluate test environment of fiber optic gyroscope(FOG). Test results show that the zero bias stability of FOG is decreased to 0.0019(°)/h(100 s, 1σ, that means the standard deviation after 100 s smoothing) in environment 4 from 0.0015(°)/h(100 s, 1σ) in environment 3, and random walk coefficient is decreased to 2.8876×10^-4(°)/h^1/2 in environment 4 from 2.1565×10^-4(°)/h^1/2 in environment 3. Another FOG with pulse output is tested under different environments, whose zero bias stability is decreased to 0.0021(°)/h(100 s, 1σ) in environment 4 from 0.0013(°)/h(100 s, 1σ) in environment 3. The experiments of two FOGs demonstrate that the proposed self-assessment technique is effective, which provides guidance for the precision test of high precision FOG.