TAO Xianlu, ZHANG Xiaohong, ZHU Feng, XIAO Jiamin. An Outlier Detection Method of GNSS/SINS Integrated Navigation Based on Accelerometer Bias Stability[J]. Geomatics and Information Science of Wuhan University, 2018, 43(7): 1078-1084. DOI: 10.13203/j.whugis20160405
Citation: TAO Xianlu, ZHANG Xiaohong, ZHU Feng, XIAO Jiamin. An Outlier Detection Method of GNSS/SINS Integrated Navigation Based on Accelerometer Bias Stability[J]. Geomatics and Information Science of Wuhan University, 2018, 43(7): 1078-1084. DOI: 10.13203/j.whugis20160405

An Outlier Detection Method of GNSS/SINS Integrated Navigation Based on Accelerometer Bias Stability

Funds: 

The National Key Research and Development Program of China 2016YFB0501803

More Information
  • Author Bio:

    TAO Xianlu, postgraduate, specializes in GNSS/SINS integrated navigation. E-mail: xltao@whu.edu.cn

  • Received Date: February 28, 2017
  • Published Date: July 04, 2018
  • In the ground vehicle integrated navigation, GNSS observations are often interfered by complex ground environment and thus, its positioning result is more prone to contain outliers which can seriously affect GNSS/SINS integrated filter solution. This paper, from the perspective of IMU system error feature, studies an outlier detection method of GNSS/SINS integrated navigation based on accelerometer bias stability. According to the outlier of accelerometer bias result, the method detects gross errors in GNSS position, velocity, etc; and then applies the robust strategies of rejection and weight reduction to resist the influence of gross errors. The method is analyzed by a set of vehicle measured data. The results show that the observation outliers can greatly affect the accelerometer bias result and thus taking the accelerometer bias stability as a condition, the outliers can be exactly detected. In every direction of ENU, the RMS of position and the RMS of velocity are improved by 70.8% and 87.9% respectively; the RMS of attitude is improved by 77.7%. The method greatly improves the accuracy and robustness of integrated navigation results and provides a new strategy for robust processing of integrated navigation data.
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