The sampling process of the PF algorithm was optimized based on the beetle antennae search algorithm to improve the particle diversity and the prediction accuracy. Meanwhile, the characteristics of Lamb wave signals under different crack lengths were extracted to establish the observation equation. The discrete Paris formula was used to establish the state equation of fatigue crack propagation, in which the uncertainty of material and crack propagation process were considered. An improved particle filter algorithm based on the optimization algorithm of beetle antenna search (IBAS-PF) for fatigue crack propagation in metals is proposed in this paper. Owing to particle leanness, the standard Particle Filter (PF) algorithm is prone to the problem of reduced prediction accuracy when predicting fatigue crack propagation.
2School of Mechanical Engineering, Jiangnan University, Wuxi, China.1Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Nanjing, China.Su Wensheng 1, Gu Zhenhua 2, Gu Jiefei 2 and Xue Zhigang 1*
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