捷联惯导系统的真锥误差分析

A True Coning Errors Analysis for SINS

航行体的角振动和线振动是引起捷联惯导系统误差的重要原因之一。本文详细分析了航行体角振动引起捷联惯导系统真锥误差的机理和原因 。

Ref.[1] does not provide information about non ideal situation of SINS (Strap down Inertial Navigation System). Such information is still needed in China. We derived eqs.(3) through (14) to deal with non ideal situation, taking into consideration the true coning errors due to angular vibration. We further considered the quantitative errors of signals, the installation errors of gyros and the non interchangeable errors of the rigid body movements. We obtained eqs.(16), (17) and (18) as their error formulations, which can help us to reduce these three types of errors. We did computation at several different angular frequencies. The results show that our approach is effective.