Vibration-based structural health monitoring of the aircraft large component

3rd International Conference on Innovative Materials, Structures and Technologies

Pavelko, V.^1 ; Kuznetsov, S.^1 ; Nevsky, A.^1 ; Marinbah, M.^1

Institute of Aeronautics, Riga Technical University, 1A Lomonosova iela, Riga LV1003, Latvia^1

关键词: Aircraft components;    Analytical studies;    Correlation coefficient;    Harmonic excitation;    Large scale structures;    Structural component;    Vibration-based damage detection;    Vibration-based structural health monitoring;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012093/pdf
DOI  :  10.1088/1757-899X/251/1/012093

来源: IOP

【 摘 要 】

In the presented paper there are investigated the basic problems of the local system of SHM of large scale aircraft component. Vibration-based damage detection is accepted as a basic condition, and main attention focused to a low-cost solution that would be attractive for practice. The conditions of small damage detection in the full scale structural component at low-frequency excitation were defined in analytical study and modal FEA. In experimental study the dynamic test of the helicopter Mi-8 tail beam was performed at harmonic excitation with frequency close to first natural frequency of the beam. The index of correlation coefficient deviation (CCD) was used for extraction of the features due to embedded pseudo-damage. It is shown that the problem of vibration-based detection of a small damage in the large scale structure at low-frequency excitation can be solved successfully.