Error suppression technique of platform inertial navigation system under condition of vibration

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (15) : 258-263.

WANG Ting 1 , YU Pei 1 , LI Jing 2

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Abstract

In launching operation process, flying object is often in vibration environment to affect navigation precision of inertial platform.In order to better identify the platform drift error coefficient under condition of vibration, the relation between output of accelerometer and platform error angle was deduced according to the small platform error angle model.According to this model, the state space equation and measurement equation were established to describe platform drift.The platform drift angle and drift angular rate were taken as state variables and estimated using the adaptive Kalman filtering.The results showed that the estimation’s convergence speed is fast and tends to be stable to effectively suppress INS velocity error divergence; compared to an uncompensated platform drift angle, the maximum INS velocity error drops by 82%-83% after vibration.

Key words

Vibration condition / platform inertial navigation system / platform drift model / error suppression method / adaptive Kalman filter

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WANG Ting 1,YU Pei 1,LI Jing 2 . Error suppression technique of platform inertial navigation system under condition of vibration[J]. Journal of Vibration and Shock, 2019, 38(15): 258-263

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