关键词: 传递对准, 挠曲变形, 杆臂效应, 速度匹配, 角速度匹配, 惯性导航系统, 初始对准

Abstract:

In order to solve the nonlinear transfer alignment problem for aircraft’s inertial navigation system with large misalignment azimuth, an incorporate acceleration error model of leverarm effect is built with the flexure of a carrier, and according to the actual position of the aircraft on the carrier, a linear error model of transfer alignment for aircraft’s inertial navigation system with large misalignment azimuth is built and consummated by importing nominal aircraft body coordinate. The “velocity+angular velocity” matching method is used to estimate both the fixed misalignment and the instantaneous dynamic distortion angle. The simulation result shows that this method can estimate the fixed misalignment and the flexure angle effectively, and satisfy the precision requirements.

Key words: transfer alignment, flexure, leverarm effect, velocity matching, angular velocity matching, inertial navigation systems, initial alignment