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A Study on the SDINS's Gyro Bias Calibration Method in Disturbances  

Lee, Youn-Seon (ADD)
Lee, Sang-Jeong (Chungnam National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.12, no.3, 2009 , pp. 368-377 More about this Journal
Abstract
In this paper we study the gyro bias calibration method of SDINS(Strap-Down Inertial Navigation System). Generally, SDINS's calibration is performed in 2-axis(or 3-axis) rate table with chamber for varying ambient temperature. We assumed that the majority of calibration-parameter except for gyro bias is knowned. During gyrobias calibration procedure, it can be induced some disturbances(accelerometer's short-term error induced rate table rotation and anti-vibration mount's rotation). In these cases, old gyro-bias calibration methods(using velocity error or attitude error) have an error, because these disturbances are not detectable at the same time. So that, we propose a new gyro-bias calibration method(heading error minimizing using equivalent linear transformation) that can detect anti-vibration mount's rotation. And we confirm efficiency of the new gyro-bias calibration method by simulation.
Keywords
INS; Calibration; Equivalent Linear Transformation;
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