摘要
旋转式惯导系统的标度因数误差效应理论分析关系系统的设计和精度的提高。从旋转式惯导系统的误差传播方程出发,推导了光学陀螺旋转式惯导系统中由于标度因数误差引起的数学平台角度误差表达式,并以此为基础,分析了非对称性标度因数误差的自动补偿效应、地球自转与对称性标度因数误差的耦合效应、转轴方向上的标度因数误差效应等现象,最后得到了要减小或者消除这些误差效应所应该注意的原则和结论。分析表明,合适的双轴转动方案能够补偿全部三个陀螺的非对称性标度因数误差;采用三轴或者三轴以上的转轴,能消除对称性标度因数误差与地球自转耦合引起的导航误差;为防止对称性标度因数误差和转位运动耦合而引起的大的导航误差,应采用正反转相结合方案。
The formulae of the mathematical platform misalignment angles induced by scale factor errors in optical gyro rotating inertial navigation system are deduced from its error-propagation equations. Based on these formulae, the auto-compensation effects of nonsymmetrical scale factor errors, coupling effects of earth spinning and symmetrical scale factor errors, and the effects of scale factor errors on the rotating axis are analyzed. Conclusions on how to decrease or eliminate the navigation errors due to these effects are obtained. The analysis results show that the nonsymmetrical scale factor errors of whole three gyroscopes can be compensated by a suitable two-axis method. The navigation error induced by coupling effects of symmetrical scale factor errors and earth spinning can be eliminated by three or above-three rotation shafts. The positive-and-negative rotation method should be adopted in order to avoid big navigation errors be induced by coupling effects of symmetrical scale factor errors and translocation moving.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2010年第2期160-164,共5页
Journal of Chinese Inertial Technology
关键词
光学陀螺
旋转式惯导系统
标度因数
自动补偿
误差分析
optical gyroscope
rotating inertial navigation system
scale factor
auto-compensation
error analysis
