An Improved Smooth Variable Structure Filter for Robust Target Tracking

Remote Sensing

Jingrong Sun¹  Yu Chen¹  Guangmin Wang¹  Bo Yan¹  Luping Xu¹ 

[1] School of Aerospace Science and Technology, Xidian University, Xi’an 710126, China;

关键词: state estimation;    target tracking;    smooth variable structure filter;    Kalman filter;   

DOI  :  10.3390/rs13224612

来源: DOAJ

【 摘 要 】

As a new-style filter, the smooth variable structure filter (SVSF) has attracted significant interest. Based on the predictor-corrector method and sliding mode concept, the SVSF is more robust in the face of modeling errors and uncertainties compared to the Kalman filter. Since the estimation performance is usually insufficient in real cases where the measurement vector is of fewer dimensions than the state vector, an improved SVSF (ISVSF) is proposed by combining the existing SVSF with Bayesian theory. The ISVSF contains two steps: firstly, a preliminary estimation is performed by SVSF. Secondly, Bayesian formulas are adopted to improve the estimation for higher accuracy. The ISVSF shows high robustness in dealing with modeling uncertainties and noise. It is noticeable that ISVSF could deliver satisfying performance even if the state of the system is undergoing a sudden change. According to the simulation results of target tracking, the proposed ISVSF performance can be better than that obtained with existing filters.

【 授权许可】

Unknown