Journal of Projectiles, Rockets, Missiles and Guidance >
Influence of IMU Angle Variable Motion on Positioning Accuracy of Rotary SINS
Received date: 2013-12-23
Online published: 2025-05-30
The influence of inertial measurement unit (IMU) rotary angular velocity variation on positioning accuracy of strapdown inertial navigation system (SINS) was studied. Angle variable motion model was established in geographic coordinate system. Then, the basic principles that equivalent gyro drift errors were compensated by rotary motion were derived. Combined with the widespread single-axis 4-position and 8-order rotation-stop scheme, the effect of acceleration and deceleration of IMU on positioning accuracy of SINS was analyzed in detail. Simulations based on theoretical analysis were carried out. Finally, the positioning errors of rotation schemes with different acceleration and deceleration were compared by simulation tests, the results verified that the accuracy of the rotary SINS was apparently impacted by angle variable motion.
LIU Shi , WANG Shian , LIU Xingzhang , ZHANG Yi , YANG Xianglong . Influence of IMU Angle Variable Motion on Positioning Accuracy of Rotary SINS[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2014 , 34(4) : 19 -24 . DOI: 10.15892/j.cnki.djzdxb.2014.04.043
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