A Rapid Initial Alignment Alogrithm Based on Strapdown Gyrocompass
The basic principles for stabilized gyrocompass initial alignment are analyzed in platform inertial navigation system (PINS),then similar principles and initial alignment algorithms suitable for programming are proposed for strapdown inertial navigation system (SINS).The scheme of SINS gyrocompass initial alignment can be divided into four steps,including leveling alignment with header uncertainty,coarse header alignment,leveling realignment and gyrocompass alignment for header.By simplifying SINS nonlinear error model under header uncertainty,the formula of coarse header alignment is deduced.On the assumption of navigation computer having large memory and powerful computing ability,and basing on the multiformity of SINS mathematical platform and the ability to attitude reverse control,a specific progress for SINS rapid gyrocompass alignment is introduced and designed in detail.Finally,some tests prove that the proposed alignment algorithm in this paper is effective.
Strapdown Inertial Navigation System(SINS) gyrocompass fast initial alignment
LI Si-hai YAN Gong-min YANG Peng-xiang QIN Yong-yuan
College of Automation, Northwestern Polytechnical University, Xian, 710072, China
国际会议
西安
英文
1563-1567
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）