Structural Damage Detection Based on Autoregressive Spectra Analysis of Time Series

2012 ◽  
Author(s):  
Ming-Hui Hu ◽  
Er-Ding Cong ◽  
Shan-Tung Tu ◽  
Fu-Zhen Xuan ◽  
Shao-Ping Zhou ◽  
...  
Keyword(s):  
Damage Detection ◽  
Autocorrelation Function ◽  
Structural Damage ◽  
Structural Damage Detection ◽  
Spectra Analysis ◽  
Power Spectral ◽  
Strain Data ◽  
On Line ◽  
Spectral Analysis Method ◽  
Analysis Of Time Series

In this paper, an autoregressive spectral analysis method is proposed for on-line structural damage detection. Firstly, the monitoring strain data are modeled as ARMA models. The power spectral density (PSD) value is directly determining by center-autocorrelation function and statistical autocorrelation function. Structural damage detection is conducted by comparing the values of PSD of the inspected structure. Two experimental applications to the detection of damage in industrial piping structure demonstrate the potential and effectiveness of the new damage detection technique.

An On-line Integration Technique for Structural Damage Detection and Active Optimal Vibration Control

2014 ◽  
Vol 14 (05) ◽  
pp. 1440003 ◽  
Author(s):  
Ying Lei ◽  
Huan Zhou ◽  
Li Jun Liu
Keyword(s):  
Damage Detection ◽  
Vibration Control ◽  
Structural Damage ◽  
Structural Control ◽  
Model Updating ◽  
Structural Parameter ◽  
Structural Damage Detection ◽  
Active Structural Control ◽  
On Line ◽  
Optimal Control Scheme

Structural damage detection and vibration control have been actively studied in the past decades. However, in most previous investigations, these two aspects have been treated separately according to their individual primary objectives pursued. Although structural identification and model updating have been used in the adaptive control techniques, it is still necessary but challenging to study the on-line integration of structural damage detection and optimal vibration control. In this paper, a technique is proposed for such purpose. First, on-line structural parameter identification and on-line detection of the onset, locations and extents of structural damage of controlled structures with partial measurements of structural acceleration responses is studied. An algorithm is proposed based on the extended Kalman estimator/Kalman estimator and error tracking. Then, the updated structural models are on-line integrated with the instantaneous optimal control scheme to reach the goal of optimal active structural control of the undamaged/damaged structures. Numerical simulation results with different structural damage patterns illustrate the performances of the proposed technique for the on-line integration of structural damage detection and active optimal vibration control.

Sign in / Sign up

Export Citation Format

Share Document