Description du projet
Des appareils ménagers et des véhicules électriques plus silencieux
Des études ont mis en évidence l’impact négatif direct des bruits d’intensité élevée sur les niveaux d’hormones du stress, voire sur notre santé cardiovasculaire. La réduction du bruit (ainsi que des vibrations, qui en sont la cause principale) des différents éléments d’une machine est donc primordiale pour ses utilisateurs potentiels. On parvient actuellement à réduire les vibrations en réalisant des essais modaux des propriétés dynamiques des machines, grâce à l’utilisation d’une excitation précise de la bande passante. Cependant, les excitateurs utilisés ne peuvent pas être appliqués aux pièces en mouvement. Le projet ProExcer, financé par l’UE, entend expérimenter l’application d’un prototype de lanceur de balle innovant. Celui-ci sera testé pour être ajustable de manière précise, afin d’exciter les axes de centres d’usinage grâce à des impacts de balle. Si les résultats s’avèrent positifs, la nouvelle sera accueillie à bras ouverts par les fabricants d’appareils ménagers et de véhicules électriques/autonomes.
Objectif
Noise is not just a nuisance; it affects our health. No accepted financial data exist for the treatment costs of noise-related health problems, but several studies prove its direct relation to stress hormone levels or cardiovascular deceases, and many public organizations promote low-noise environment to protect health and comfort. Noise reduction has become major field of manufacturers’ competition: noise level data appear on domestic machines from mixers to dishwashers, brand names with ‘whisper’ or ‘silence’ are popular, aircrafts are successful due to their low noise levels. The efficient way to reduce noise is the elimination of its source that is usually vibration of some machine elements. Vibration elimination is relevant in the development of electric and self-driving cars where control panels and MEMS devices are sensitive for high-frequency excitations in the same way as high-performance machine tools are with aims at (sub)micron cutting precision.
Methods of vibration reduction are based on the so-called modal testing that identifies the machines’ dynamic properties like natural frequencies. The test requires accurate broadband excitation. Commercial exciters have several drawbacks; one of these is the limited applicability for moving targets, rotating shafts. In the ERC Advanced Grant “SIREN”, a patent application was submitted and the pre-prototype of a ball shooter was constructed to excite spindles of machining centres by ball impacts. Experiments with the pre-prototype proved that the contact time is one order of magnitude shorter than that of standard impulse tests, while the force signal is near ideal: prall-free impulses with 30 kHz bandwidth were generated. Potential industrial end-users and distributors expressed interest in case a prototype is developed with accurately tuneable impact time/location together with precise online detection of impact direction for moving objects. These tasks form the work packages and deliverables of the proposal.
Champ scientifique
- engineering and technologymechanical engineeringvehicle engineeringautomotive engineeringautonomous vehicles
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- engineering and technologymechanical engineeringmanufacturing engineeringsubtractive manufacturing
Programme(s)
Régime de financement
ERC-POC-LS - ERC Proof of Concept Lump Sum PilotInstitution d’accueil
1111 Budapest
Hongrie