풍력발전기 블레이드의 모니터링 시스템을 위한 진동기반형 자가발전기 피로수명평가

초록

Vibration-based energy harvesters (VEHs) intend t。 replace or extend service life 01 batteries lor condition monitoring system lor high-risk structures such as wind turbine, in which it is hard to supply the electrical power for data measurement and transmission. VEHs should have the sufficient durability, to monitor the safety or structural integrity 01 structure. This study aims t。 predict latigue life 01 the VEH, which may be used lor power supply 01 the condition monitoring system 01 the blade. For this, the acceleration was calculated using the GH-BladedTM at the most probable zone 01 failure in the blade. Based on these re s미 ts， random response analysis was performed to identify structural integrity 01- VEHs .considering the resonance of VEHs. Vibration fatigue analysis was performed ' in frequency domain to identify of fatigue life of VEHs considering the resonance between excitation and natural frequencies