Acta Geodaetica et Cartographica Sinica ›› 2023, Vol. 52 ›› Issue (8): 1278-1285.doi: 10.11947/j.AGCS.2023.20210735

• Geodesy and Navigation • Previous Articles     Next Articles

AUV multi-source information fusion localization method based on robust factor graph

HUANG Ziru1,2, CHAI Hongzhou1, XIANG Minzhi1,3, DU Zhenqiang1,3   

  1. 1. Information Engineering University, Zhengzhou 450001, China;
    2. Troops 32022, Guangzhou 510000, China;
    3. The Key Laboratory of Ocean Geomatics, Ministry of Natural Resources, Qingdao 266590, China
  • Received:2022-01-07 Revised:2023-03-20 Published:2023-09-07
  • Supported by:
    The National Natural Science Foundation of China (No. 42074014)

Abstract: Compared with the extended Kalman filtering (EKF) algorithm, factor graph optimization (FGO) shows better stability, flexibility and expansibility for the asynchronous and dynamic change of sensor information carried by AUV. This paper compares the performance of FGO and EKF algorithms applied to AUV multi-sensor information fusion and location firstly, and then proposes an AUV multi-source information fusion location method based on robust factor graph to solve the problem that abnormal observations of sensors affect the positioning accuracy of FGO algorithm in complex underwater environment. Dynamic covariance scaling (DCS) strategy was used to reduce the weight of the gross error factor, and the algorithm was verified by simulating the observed gross error based on the sea data. The ordinary FGO algorithm and DCS anti-difference FGO algorithm were used to calculate the data disturbed by gross error. The statistical results show that the proposed algorithm reduces the plane position error by 14.6% compared with that without anti-error processing, and has good robustness for abnormal observation.

Key words: factor graph, multi-source information fusion localization, autonomous underwater vehicle, robust factor graph

CLC Number: