MultiMonitor RB: Multivariate Damage Monitoring of Rotor Blades

The monitoring system to be developed compares acoustic procedures with the possibility of pinpointing damage (high- and low-frequency acoustic emission) and structural mechanical methods of integrity analysis. The systems function independently of each other and each addresses different forms of damage specifically. In addition, they can also measure different parameters and damage factors, resulting in a comprehensive and extensive record of the overall rotor blade condition.

In this project, Fraunhofer IWES is focusing on the evolution of the acoustic emission testing (AET) technique, in which sensors are employed to detect material changes. Adaptation of the technique to reflect the particular material characteristics of rotor blades and their application scenarios should produce a cost-effective structure monitoring system, which will cut costs in the long term. The project will see the development and production of a 40-meter rotor blade at Fraunhofer IWES, followed by a full blade test until the specimen breaks. The systems will then be installed on a wind turbine operated by WindMW and validated in terms of suitability for use

The overall goal of MultiMonitor RB is to develop, combine, and test global and local structural health monitoring processes for wind turbine rotor blades. The SHM processes are aimed at ensuring automated and reliable detection and classification of structurally relevant damage relating at an early damage stage. This minimizes downtimes and taps savings potential.