Improved forward and backward adaptive smoothing algorithm
Improved forward and backward adaptive smoothing algorithm
复制标题
改进的前向和后向自适应平滑算法
DOI:
10.1007/s10291-021-01185-0
复制
发表时间:
2021-10
期刊:
影响因子:
4.9
通讯作者:
Li Wei
中科院分区:
文献类型:
--
作者:
Lin Xu;Yang Xinghai;Hu Chihao;Li Wei
Kalman smoothing algorithms are widely used in offline data processing in target tracking systems to improve filter calculations accuracy. The essence is weight averaging in forward and backward Kalman filters. When there is an abnormal dynamic model in the system, the adaptive Kalman filter algorithm can reduce its impact on the filter results to a certain extent. Nevertheless, because there are various methods for selecting adaptive factors and all of them are complicated, it is difficult to select the optimal adaptive factors. Therefore, the forward filter and backward filter results are suboptimal when a dynamic model abnormality occurs, which, in turn, causes the smoothing accuracy to decrease after the weighted average before and after this abnormality. We propose an improved forward and backward adaptive smoothing (IFBAS) algorithm. During the smoothing process, adaptive factors of the forward adaptive Kalman filter and the backward adaptive Kalman filter are used to modify the covariance information twice to reduce the influence of suboptimal filter information on smoothing accuracy. We apply the IFBAS algorithm to the GPS/INS integrated navigation system and data postprocessing of the GNSS network. The results of simulation experiments and time series of IGS station analysis examples show that the IFBAS algorithm can effectively suppress the influence of abnormal dynamic models and improve smoothing accuracy.
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DOI:
10.3390/s18072352
发表时间:
2018-07-20
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
作者:
Zhao X;Li J;Yan X;Ji S
通讯作者:
Ji S
影响因子:
4.9
作者:
Pan Li;Xinyuan Jiang;Xiaohong Zhang;M. Ge;H. Schuh
通讯作者:
Pan Li;Xinyuan Jiang;Xiaohong Zhang;M. Ge;H. Schuh
影响因子:
4.9
作者:
Yunzhong Shen;Zebo Zhou;Bofeng Li
通讯作者:
Bofeng Li
影响因子:
3.3
作者:
D. Melgar;T. Melbourne;B. Crowell;J. Geng;W. Szeliga;C. Scrivner;M. Santillan;D. Goldberg
通讯作者:
D. Melgar;T. Melbourne;B. Crowell;J. Geng;W. Szeliga;C. Scrivner;M. Santillan;D. Goldberg
影响因子:
4.4
作者:
Yang, Yuanxi;Gao, Weiguang
通讯作者:
Gao, Weiguang