Error Analysis of Strapdown Inertia Navigation System in Tactical Missiles

摘要

To clarify the navigation error of strapdown inertial navigation system(SINS) with low navigation accuracy, short working period, and fickle operating environment that installed in tactical missiles, a new navigation error model of SINS was established. Founded by a six dimensional kinematic model of tactical missile and a three dimensional target model, the paper rebuilt the whole course of tactical missile attacking the moving target, where correlative output parameters were used to calculate the navigation error model of SINS simultaneously. Experiment result revealed the influence of different error sources to navigation errors of SINS, which is constructive to the improvement of navigation accuracy of SINS.