کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1718386 | 1013839 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An innovative scheme for SINS/GPS ultra-tight integration system with low-grade IMU An innovative scheme for SINS/GPS ultra-tight integration system with low-grade IMU](/preview/png/1718386.png)
In the traditional strapdown inertial navigation system/global positioning system (SINS/GPS) ultra-tight integration structure, the mutual aiding between SINS and GPS forms a positive feedback loop, through which measurement errors of both subsystems are coupled deeply. In signal jamming or/and dynamic conditions, the Doppler aiding error derived from the SINS using low-grade inertial measurement unit (IMU) can increase rapidly, and cause GPS measurement errors to be correlated with the SINS velocity errors. Such correlations can result in poor estimation accuracy of the integration Kalman filter, losing lock of tracking loops or even yielding system instability. To solve this problem, we propose to model tracking errors of the SINS aided phase lock loop and to derive a new tracking-error estimator. Then, an innovative scheme for SINS/GPS ultra-tight integration using low-grade IMU is investigated. Simulations experiments are implemented to verify this innovative scheme under challenging environments.
Journal: Aerospace Science and Technology - Volume 23, Issue 1, December 2012, Pages 452–460