An Enhanced Mutated Particle Filter Technique for System State Estimation and Battery Life Prediction

作者：Mohamed Ahwiadi, Wilson Wang · 发表于：IEEE Transactions on Instrumentation and Measurement · 年份：2018 · DOI：10.1109/tim.2018.2853900 · 被引用次数：106 · 研究领域：Fault Detection and Control Systems、Water Systems and Optimization、Target Tracking and Data Fusion in Sensor Networks

The particle filter (PF) has been used for the analysis of nonlinear, non-Gaussian dynamical systems with hidden state variables. However, PF has some limitations in real-world applications, for instant, the sample degeneracy and the impoverishment, which are considered as long-standing challenges in this research and development field. Although several techniques have been proposed in the literature for this purpose, they have some limitations: for example, they cannot represent the entire probability density function (pdf) effectively and are usually problem dependent. In this paper, an enhanced mutated PF (EMPF) technique is proposed to improve the performance of PFs. In the EMPF technique, first, a novel enhanced mutation approach is proposed to actively explore the posterior pdf to locate the high-likelihood area. Second, a new selection scheme is suggested to process low-weight particles for optimizing the posterior distribution and tackling sample degeneracy. Third, an outlier assessment method is adopted to monitor the overall pattern of the posterior distribution based on the interquartile range statistical analysis. The effectiveness of the proposed EMPF technique is verified by simulation tests. It is also implemented for the remaining useful life prediction of lithium-ion batteries. Test results show that the developed EMPF technique can capture a system's dynamic behavior and track system characteristics effectively.