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Decreasing weight particle swarm optimization combined with unscented particle filter for the non-linear model for lithium battery state of charge estimation.

Chen, Lei; Wang, Shunli; Jiang, Hong; Fernandez, Carlos; Zou, Chunyun

Authors

Lei Chen

Shunli Wang

Hong Jiang

Carlos Fernandez

Chunyun Zou



Abstract

Accurate estimation of State of Charge (SOC) of wireless sensor network nodes is of great significance for wireless sensor network layout. A combination strategy method based on unscented particle filter using weight particle swarm optimization (PSO UPF) algorithm is proposed to improve estimation accuracy. The particle filter (PF) algorithm is usually used to deal with nonlinear problems, easily falling into particle degeneration and particle shortage. The unscented particle filter (UPF) algorithm can overcome the shortcomings by using the unscented Kalman filter (UKF) to generate the importance density function. Meanwhile, the particle swarm optimization (PSO) algorithm could improve the resampling process to solve particle shortage. Thus, the combination strategy improves the importance density function and the resampling method simultaneously. With the simulation comparison of PF, UPF and PSO UPF algorithms, the results show that the proposed algorithm has higher estimation accuracy with the root mean square error less than 1%. Furthermore, the proposed algorithm could achieve good accuracy with few particles, which could save running time and improve the estimate efficiency.

Journal Article Type Article
Publication Date Oct 31, 2020
Journal International Journal of Electrochemical Science
Print ISSN 1452-3981
Publisher Electrochemical Science Group
Peer Reviewed Peer Reviewed
Volume 15
Issue 10
Pages 10104-10116
Institution Citation CHEN, L, WANG, S., JIANG, H., FERNANDEZ, C. and ZOU, C. 2020. Decreasing weight particle swarm optimization combined with unscented particle filter for the non-linear model for lithium battery state of charge estimation. International journal of electrochemical science [online], 15(10), pages 10104-10116. Available from: https://doi.org/10.20964/2020.10.41
DOI https://doi.org/10.20964/2020.10.41
Keywords State of charge; Particle filter; Unscented particle filter; Linearly decreasing weight particle swarm optimization

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