title: Research on a Lamb Wave and Particle Filter-Based On-Line Crack Propagation Prognosis Method.
abstract: Prognostics and health management techniques have drawn widespread attention due to their ability to facilitate maintenance activities based on need. On-line prognosis of fatigue crack propagation can offer information for optimizing operation and maintenance strategies in real-time. This paper proposes a Lamb wave-particle filter (LW-PF)-based method for on-line prognosis of fatigue crack propagation which takes advantages of the possibility of on-line monitoring to evaluate the actual crack length and uses a particle filter to deal with the crack evolution and monitoring uncertainties. The piezoelectric transducers (PZTs)-based active Lamb wave method is adopted for on-line crack monitoring. The state space model relating to crack propagation is established by the data-driven and finite element methods. Fatigue experiments performed on hole-edge crack specimens have validated the advantages of the proposed method.
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China. cj1108@nuaa.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China. ysf@nuaa.edu.cn.
authors.forename: Shenfang
authors.initials: S
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China. lei.qiu@nuaa.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Qiu
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China. caijian@nuaa.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Cai
authors.affiliation: State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China. ywb1987@nuaa.edu.cn.
authors.forename: Weibo
authors.initials: W
authors.lastname: Yang
keywords: active Lamb wave monitoring; fatigue crack propagation; on-line; particle filter; prognostics and health management