Advanced distributed fiber optic sensing in aeronautics

Purpose and goal

This project has met the objective to evaluate the possibility of using optical fiber sensors embedded in aircraft structure for advanced 2D / 3D mapping of the air pressure around the wing and vibrations in the structure. The study showed that the fiber sensor don´t fulfil the requirements for pressure sensing, for vibration sensing the fiber sensor meet the requirements.

Expected results and effects

We have increased knowledge about the technical and commercial potential of fiber sensors. We have evaluated the fiber´s sensitivity to pressure and vibration, studied the overall requirements for signal processing and potential hardware bottlenecks. We have performed tests with fiber embedded in the composite material. We have further developed the initial approach for measuring pressure. We performed a market study and was in contact with potential users.

Planned approach and implementation

Collaboration between three partners with edge expertise in each area provides a unique set of complementary capabilities that enable multi-disciplinary research and systems-oriented overall view when developing the concept of distributed fiber optic sensing. Acreo: Design, simulation and manufacturing of fibers. KTH: Composite material characterization and evaluation. SAAB: Future aeronautics needs. The feasibility study was ambitious and most of the technical and economic objectives have been met.