An Improved Innovation Adaptive Kalman Filter for Integrated INS/GPS Navigation

Bo Sun, Zhenwei Zhang (), Dianju Qiao, Xiaotong Mu and Xiaochen Hu
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Bo Sun: The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China
Zhenwei Zhang: College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Dianju Qiao: College of Intelligent Equipment, Shandong University of Science and Technology, Tai’an 271019, China
Xiaotong Mu: College of Intelligent Equipment, Shandong University of Science and Technology, Tai’an 271019, China
Xiaochen Hu: The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China

Sustainability, 2022, vol. 14, issue 18, 1-17

Abstract: The performance of transportation systems has been greatly improved by the rapid development of connected and autonomous vehicles, of which high precision and reliable positioning is a key technology. An improved innovation adaptive Kalman filter (IAKF) is proposed to solve the vulnerability of Kalman filtering (KF) in challenging urban environments during integrated navigation. First, the algorithm uses the innovation to construct a chi-squared test to determine the abnormal measurement noise; on this basis, the update method of the measurement noise variance matrix is improved, and the measurement noise variance matrix is adaptively updated by the difference between the current innovation and the mean value of the innovation when the measurement data is abnormal so as to reflect the impact degree of the current abnormal measurement data, thus suppressing the filtering divergence and improving the positioning accuracy. The experimental results show that the proposed algorithm can well suppress the filtering divergence when the measurement data are disturbed. The results demonstrate that the algorithm in this paper has improved adaptiveness and stability and provides a novel idea for the development of an intelligent traffic positioning system.

Keywords: connected and autonomous vehicles; integrated navigation system; information fusion; innovation; adaptive Kalman filter (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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