Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (7): 85-89,109.doi: 10.13474/j.cnki.11-2246.2025.0714

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Short-term inertial navigation assisted error compensation method for dynamic gyrocompass attitude angles

YANG Xu1, HUANG Xiaojuan2, ZHANG Yanshun3, LIU Zhaoyang1   

  1. 1. Shannxi Energy Institute, Xianyang 712000, China;
    2. Beijing Aerospace Times Optical-Electronic Technology Co., Ltd., Beijing 100094, China;
    3. School of Instrumentation and Opto-electronic Engineering, Beihang University, Beijing 100191, China
  • Received:2024-11-29 Published:2025-08-02

Abstract: The heading and attitude measurement of the strapdown gyrocompass will be greatly affected by the dynamic motion of the carrier,resulting in significant errors.Based on the analysis of the transmission mechanism of carrier motion acceleration error,a dynamic compensation method for attitude measurement error of gyrocompass is proposed using the idea of inertial navigation without divergence in a short period of time.When the carrier is in dynamic motion,a short-term inertial navigation algorithm with periodic reset is used to continuously calculate the motion acceleration in the navigation system,compensate for the disturbed accelerometer data in the compass loop,and thereby reduce dynamic measurement errors.The experimental results show that the root mean square error (RMSE) of the heading angle after dynamic compensation is 0.792°,and the pitch angle and roll angle are less than 0.030°,effectively improving the dynamic attitude measurement performance of the gyrocompass system.

Key words: strapdown gyrocompass, inertial navigation, dynamic maneuver, motion alignment, error compensation

CLC Number: