INS/SAR组合导航参数传递建模及精度分析  

Modeling and Accuracy Analysis of Parameter Transmission in INS/SAR Integrated Navigation System

作　　者：卜彦龙[1] 潘亮[1] 牛轶峰[1] 胡国昌[1] 沈林成[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院,湖南长沙410073

出　　处：《航空学报》2009年第3期526-533,共8页Acta Aeronautica et Astronautica Sinica

基　　金：湖南省自然科学基金(07JJ3127);国防科技大学优秀博士创新基金(B070301)

摘　　要：对合成孔径雷达景象匹配辅助(INS/SAR)组合导航中地面合成孔径雷达(SAR)匹配点位置参数向飞行器主惯导中心的传递过程进行研究。分析了SAR匹配点位置传递过程中所涉及的各环节及其相互关系,以此为基础建立了测量参数传递过程数学模型,提出适合该模型的误差分析与精度估计方法,结合理论和实验结果对各测量参数误差所造成的传递误差进行分析和比较,得出单一测量参数误差影响程度的排序,并在此基础上得出总精度的估计值。参数传递模型及精度实验结果与实际情况相符,可为组合导航中合理的精度分配提供依据。In this article, the parameter transmission course from a synthetic aperture radar （SAR） image matching point on the ground to the center of the inertia navigation system （INS） on the air vehicle is studied. Relations between the transmission stages are first analyzed, based on which the mathematical model of the parameter transmission course is established. Then an approach for error analysis and accuracy estimation for the model is proposed, and the accuracy effect from each parameter is analyzed, compared and subsequently ordered by combining the theoretical considerations and experimental results. On the basis of the above work, a synthesized estimation of transmission accuracy is computed. Simulation results of the synthesized accuracy estimation show the reasonableness of the transmission model, which may prove to be an appropriate way to accuracy distribution for an INS/SAR integrated navigation system.

关 键 词：INS/SAR组合导航 匹配参数传递模型 传递转换关系 误差分析 总精度估计 

分 类 号：V241[航空宇航科学与技术—飞行器设计] TP79[自动化与计算机技术—检测技术与自动化装置]