TY - JOUR
T1 - Testing of a Fiber-Optical Sensor System for Rotor Blade HUMS
AU - Berghammer, Florian
AU - Sosa, Benedikt
AU - Heuschneider, Verena
AU - Yavrucuk, Ilkay
AU - Hajek, Manfred
N1 - Publisher Copyright:
© 2025 Vertical Flight Society.
PY - 2025/1
Y1 - 2025/1
N2 - As a prerequisite for the development of HUMS (health and usage monitoring systems) using blade displacement and sectional force estimation in forward flight, rotor blades are instrumented with FBG (fiber Bragg grating) sensors at the Institute for Helicopter Technologies & VTOL at the Technical University of Munich. Utilizing 60 directional strain measurements, it is possible to reproduce the strain field of five sections along the uniform airfoil. Thermographic scan methods and CT (computed tomography) scans are investigated to determine the precise sensor locations and to reproduce a three-dimensional model. Improvements can be seen when comparing results obtained from static deformation tests. In addition, sectional stiffness terms are derived, and an experimental modal analysis is carried out. With the scope of state observation on the MERIT (Munich Experimental Rotor Investigation Testbed) test rig at the TU Munich a measurement environment is established using an optical data transmission to extract strain signals from the rotating system. The first investigations show the potential of optical strain measurements in the rotating systems for various applications.
AB - As a prerequisite for the development of HUMS (health and usage monitoring systems) using blade displacement and sectional force estimation in forward flight, rotor blades are instrumented with FBG (fiber Bragg grating) sensors at the Institute for Helicopter Technologies & VTOL at the Technical University of Munich. Utilizing 60 directional strain measurements, it is possible to reproduce the strain field of five sections along the uniform airfoil. Thermographic scan methods and CT (computed tomography) scans are investigated to determine the precise sensor locations and to reproduce a three-dimensional model. Improvements can be seen when comparing results obtained from static deformation tests. In addition, sectional stiffness terms are derived, and an experimental modal analysis is carried out. With the scope of state observation on the MERIT (Munich Experimental Rotor Investigation Testbed) test rig at the TU Munich a measurement environment is established using an optical data transmission to extract strain signals from the rotating system. The first investigations show the potential of optical strain measurements in the rotating systems for various applications.
UR - http://www.scopus.com/inward/record.url?scp=85215860092&partnerID=8YFLogxK
U2 - 10.4050/JAHS.70.012006
DO - 10.4050/JAHS.70.012006
M3 - Article
AN - SCOPUS:85215860092
SN - 0002-8711
VL - 70
JO - Journal of the American Helicopter Society
JF - Journal of the American Helicopter Society
IS - 1
M1 - 012006
ER -