临近空间飞行器两种捷联惯导算法的等价性  

Equivalency Between Two Strapdown Algorithms in Near Space

作　　者：陈凯[1] 殷娜 刘明鑫[1] Chen Kai;Yin Na;Liu Mingxin(School of Astronautics,Northwestern Polytechnical University,Xi＇an 710072,China)

机构地区：[1]西北工业大学航天学院,西安710072

出　　处：《航天控制》2018年第5期42-46,共5页Aerospace Control

基　　金：航天科技创新基金;航天科学技术基金

摘　　要：分析了临近空间高超声速飞行器的弹道特点,指出临近空间飞行器具有航天和航空的双重导航信息需求。介绍了发射惯性坐标系和当地水平坐标系下的捷联惯导算法,前者是航天体系下垂直发射飞行器典型导航算法,而后者是地球表面航空飞行器的典型导航算法。针对临近空间飞行高度,改进了航空体系捷联惯导算法中重力计算模型。从位置、速度和姿态3个角度,得到了2种导航体系下导航信息的转换关系,证明了2种导航体系下导航信息的等价性。The trajectory characteristics of the near space hypersonic vehicle are analyzed,and it is presented that the near space hypersonic vehicle has the dual needs of astronautics and aeronautics navigation solutions. In this paper,a typical strapdown inertial navigation algorithm for aeronautics system and a typical strapdown inertial navigation algorithm in launch centered inertial（ LCI） frame for astronautics system are introduced. The strapdown algorithm in LCI frame is the typical navigation algorithm for vertical launch vehicle. The SINS algorithm in local-level（ LL） frame is the typical navigation algorithm for the vehicle along the surface of the earth. The normal gravity model of the strapdown algorithm in LL frame is improved for the near space flight. By the three perspectives of position,velocity vector and attitude angles,the conversion relations of navigation solutions under two kinds of navigation systems are obtained,and the equivalence of navigation solutions under two navigation systems is proven.

关 键 词：临近空间飞行器 捷联惯导算法 等价性 坐标转换 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]