针对飞行器惯性导航系统需要在发射前通过初始对准获取航向角的需求,提出了一种基于结构传递的间接初始对准方法。将初始对准过程分解为飞行器总装过程中的总装对准与射前对准,通过基面转换装置与飞行器表贴棱镜实现了飞行器惯性导航系统航向角的传递与测量。通过理论误差分析与地面试验表明:该方法可满足一般技术验证类演示验证飞行器的初始对准精度要求;成功避免飞行器上设计额外的初始对准窗口,简化飞行器发射场地需求,有效缩短飞行器在发射前的准备时间。

In response to the requirement that the aircraft inertial navigation system needs to obtain the heading angle through initial alignment before launch, an indirect initial alignment method based on structure transfer is proposed; the initial alignment process is decomposed into the final assembly alignment and launch alignment. The transfer and measurement of the aircraft’s inertial navigation system heading angle are realized by the base surface conversion device and the aircraft surface-mounted prism; theoretical error analysis and ground tests show that the method could meet the initial alignment accuracy requirements of the general technical verification demonstration aircraft. The method successfully avoids the aircraft design additional initial alignment windows,simplifies the aircraft launch site requirements and effectively shortens the aircraft’s preparation time before launch.