Real-time hysteresis identification in structures based on restoring force reconstruction and Kalman filter

Li Wang, Jia Guo, Izuru Takewaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Identifying the local nonlinear hysteretic behaviors in structures arises as an important issue in structural health monitoring. This paper develops a new hysteresis identification framework where rather than identifying the hysteretic parameters, the restoring forces are reconstructed so as to identify the hysteretic loops. Under this new framework, there is no need to get a priori knowledge on the hysteretic models, enabling a wider range of applications, and the involved system equation is linear with unknown restoring forces, tending to be more efficient. Then, the Kalman filter is adopted for real-time restoring force reconstruction because the Kalman filter is celebrated for its efficiency, effectiveness and reliability in linear system estimation with noisy measured data. In doing so, the restoring forces are additionally augmented as state variables and such augmentation is shown to act as the role of Tikhonov regularization, by which the proper covariance of the augmentation as the regularization parameter is selected via the L-curve method. Numerical examples are presented and an experimental test is conducted to verify the effectiveness and robustness of the proposed real-time hysteresis identification method.

Original languageEnglish
Article number107297
JournalMechanical Systems and Signal Processing
Volume150
DOIs
Publication statusPublished - 2021 Mar

Keywords

  • Augmented Kalman filter
  • Hysteresis identification
  • Hysteretic loop
  • L-curve method
  • Restoring force reconstruction
  • Tikhonov regularization

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications

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