Abstract
Carbon fiber-reinforced plastics (CFRP)-packaged fiber Bragg grating (FBG) sensors are widely used in full-scale structural testing of wind turbine blades (WTBs). However, the specific process to make CFRP-packaged FBG sensors, such as packaging, bonding, welding, etc., are mainly manually operated, and no unified standard or rule has been formed yet. Non-standard specific processes, coupled with complex stress distribution, unstable working environments, etc., result in the CFRP-packaged FBG sensors having various failures with time, resulting in inaccurate measurements. Thus, the need to carry out related failure analysis is urgent. This paper therefore performed a reliability analysis for CFRP-packaged FBG sensors using failure mode and effects analysis (FMEA) and fault tree analysis (FTA) techniques. The results provide an important basis towards analyzing performance degradation and functional failures for CFRP-packaged FBG sensors.
Highlights
Based on failure mode and effects analysis (FMEA), three key faults with a higher risk priority number (RPN) share are further anaan in-depth reliability analysis for Carbon fiber-reinforced plastics (CFRP)-packaged fiber Bragg grating (FBG) sensors, this paper will study lyzed using the fault tree analysis (FTA) technique in Section 4, the minimum cut set of the reliability and availability of CFRP-packaged FBG sensors applied in wind turbine blades (WTBs) full-scale each key fault is determined, theand failure probabilityand as well as the the foundation property weightistructural testing by using theand
FBG sensors showed a variety of failure modes
The CFRP-packaged FBG sensors showed a variety of failure modes
Summary
The FMEA technique the FMEA and techniques have been widely applied to engineering well- are is conducted, the FTA failure modes of FBG sensors as wellfor as their the causes established and well-understood features, and their effectiveness in improving system ascertained, the effects of the failure modes are analyzed, and the RPN of each failure item reliability and availability has been proven [18,19,20,21] In this regard, based on the need for is calculated. Based on FMEA, three key faults with a higher RPN share are further anaan in-depth reliability analysis for CFRP-packaged FBG sensors, this paper will study lyzed using the fault tree analysis (FTA) technique, the minimum cut set of the reliability and availability of CFRP-packaged FBG sensors applied in WTB full-scale each key fault is determined, theand failure probabilityand as well as the the foundation property weightistructural testing by using theand.
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