基于双位置回转技术的磁悬浮陀螺寻北数据特征研究

North-seeking Data Characters of Magnetic Suspending Gyroscope Based on Two Positions Rotary

根据磁悬浮陀螺寻北理论模型对双位置采样数据进行理论分析,并通过多角度寻北实验对理论分析结果进行验证,发现磁悬浮陀螺实际寻北过程具有一定的规律性,与理论模型间存在一定系统性偏差,其主要体现在与寻北架设方位相关的趋势项偏差以及常数性偏差。经过分析,二者不会对陀螺的寻北稳定性产生影响,其中常数性偏差会对陀螺绝对寻北精度产生影响,但其可以通过双位置寻北数据差分的方式抵消。最后,提出根据磁悬浮陀螺寻北数据特征可以作为陀螺寻北数据滤波、粗差剔除的先验条件,亦可根据此特征对陀螺定向精度进行评定。

By theory analysis of two positions sample data based on north-seeking model of magnetic suspending gyroscope, and theo-retically analysis results were validated by multi-angle north-seeking experiment, it showed that some regularity appeared during north-seeking process of magnetic suspending gyroscope, and some systematic deviations existed to theory model, the main systematic devia-tions were trend deviation that had some connection with north-seeking installment position and constant deviation.North-seeking stabili-ty of gyroscope would not be influenced by two factors above, north-seeking precision would be influenced by constant deviation, but the deviation could be offset by data difference of double positions north-seeking.The paper showed that magnetic suspending gyroscope north-seeking data characters could be as prior condition of gyroscope north-seeking data filter and gross error elimination, and then gy-roscope precision could be evaluated by it.