高精度光纤陀螺标度因数测试软件设计

Design of high accuracy FOG scale factors calculation test software

陀螺仪输出的角速率信号是与载体运动角速率成一定比例关系的,其精度直接影响导航系统的精度。对光纤陀螺而言,随着国内外精度逐步提高,以光纤陀螺为核心的捷联惯性导航系统的应用越来越广泛。但很多应用表明,影响光纤陀螺仪精度的标度因数并非是完全线性的,并且具有正负不对称性,这对导航精度显然会有所影响。为了进一步提高精度,研究了一种精确测试计算光纤陀螺标度因数、标度因数非线性度及不对称性的方法,对光纤陀螺进行速率实验,并编制相应的软件计算出光纤陀螺标度因数等参数。

The output signal of the Gyroscope is proportional to the vehicles＇ input angular rate, which directly affects the accuracy of the precision navigation system. For the Fiber Optical Gyroscope（FOG）,with the precision of FOG at home and abroad is gradually increased, the use of strap-down inertial navigation system（SINS）with FOG is more and more widely.But many applications show that the FOG scale factor is not completely linear, and has positive and negative asymmetry, which will obviously have an impact on the accuracy of navigation system.To further improve the accuracy, this paper find out a precise calculation method of the FOG scale factor, FOG scale factor non-linearity and asymmetry by the rate experiments, and programmed the corresponding software to calculate the FOG scale factor and other parameters.