Description du projet
Amélioration des systèmes de surveillance de l’état des transmissions des giravions
La boîte de vitesses principale, ou transmission, est un élément essentiel de l’aptitude au vol d’un hélicoptère. Elle contrôle la vitesse et fournit le couple aux rotors. Pour plus de sécurité, les hélicoptères sont équipés d’un système de surveillance de l’état et de l’utilisation (HUMS pour «health and usage monitoring system») qui permet d’évaluer l’usure de la transmission et de prévoir la durée de vie restante des principaux composants. Cependant, les HUMS existants peuvent être mal adaptés aux technologies de pointe en matière de conception et de matériaux des giravions. C’est pourquoi, dans le cadre du programme Clean Sky 2, le projet iGear, financé par l’UE, entend mettre au point un système de surveillance de l’état des structures adapté aux nouvelles technologies, qui permettra de localiser et de détecter rapidement les défaillances des engrenages et des roulements sur la base de mesures des vibrations, des émissions acoustiques et des caractéristiques de l’huile. Cela permettra aux opérateurs de planifier des stratégies de maintenance efficaces tout en augmentant la sécurité des aéronefs.
Objectif
The ultimate goal of the iGear (Intelligent Gearbox for Endurance Advanced Rotorcraft) project is the development of an on-the-fly Structural Health Monitoring (SHM). This innovative system will be applied to the lateral rotor gearboxes and engine to main gearbox reduction stages, in the framework of LifeRCraft demonstrator for the Fast Rotorcraft IADP. This topic is of high importance in order to promote enabling technologies for next generation gearboxes comprising new materials, namely composite or ceramic.
The primary objective of the iGear proposal is to assess technologies suitable to characterize health monitoring condition of gearboxes, mainly by enabling the provision of the localization and early detection of gearing and bearing failure. The ultimate goal is the early detection of on-going failures to allow for prompt maintenance or part replacement. This project inherits significant knowledge and developments made by Active Space Technologies and Cranfield University during former or ongoing research activities related to solutions performing in harsh environments, namely accelerometers, temperature detectors, and acoustic emission sensors.
In this project we will need an innovative approach to the use of ceramic ball bearings for the high speed shaft. The combination of vibration, oil analysis, among other technologies, will be used for both the Lateral Rotor Gearboxes and the Engine to Main Gearbox reduction stages. The key innovation we propose is the use of data fusion across condition indicators (Cis) to increase the robustness of diagnosis. We will seek to avoid excessive computation while maintaining traceability to acceptable rule-based diagnosis and probability, e.g. by adopting fuzzy logic for signal fusion. We will also examine the effectiveness of a system oriented approach, seeking to understand the sensitivities around the health state transitions, which must be transmitted to the user rather than solely focussing on damage measurements.
Champ scientifique
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensors
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraftrotorcraft
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaeronautical engineering
- engineering and technologymaterials engineeringceramics
- natural sciencescomputer and information sciencesdata sciencedata processing
Programme(s)
Thème(s)
Régime de financement
CS2-IA - Innovation actionCoordinateur
MK43 0AL Cranfield - Bedfordshire
Royaume-Uni