基于温度的挠性陀螺多速率精确标定技术研究

Research on multi-rate precision calibration technique for flexible gyroscope based on temperature

分析了一类智能交通系统(intelligent transportation system,ITS)用挠性陀螺的标度因数与输入角速率和环境温度之间的非线性关系,重点研究了不同环境温度下标度因数的变化规律及其标定问题。充分考虑了输入角速率与环境温度对挠性陀螺标度因数的影响,首次提出了一种基于环境温度的挠性陀螺多速率精确标定与补偿方法,建立了高阶、高次、非线性的标度因数拟合模型。实验研究结果表明,相对现有技术,提出的模型拟合精度较高且应用简便,能够有效地降低温度对标度因数的影响,提高挠性陀螺的温度适应性。

The nonlinear relationship between the scale factor of flexible gyroscope mainly used in intelligent transportation system（ITS） and the input angle rate as well as environment temperature is analyzed; the variation law of scale factor and its calibration problem under different environment temperatures are studied emphatically. The influence of input angle rate and environment temperature on the scale factor of flexible gyroscope is fully considered; and a kind of multi-rate precision calibration and compensation method based on environment temperature for flexible gyroscope is proposed; then a high-order, high-degree and nonlinear scale factor fitting model is established. Experiment results show that, compared with existing techniques, the proposed model features high fitting precision and easy to be applied, and can reduce the influence of temperature on scale factor and improve the temperature adaptability of flexible gyroscope effectively.