Hybrid active vibration control method and device,...

G - Physics – 10 – K

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G10K 11/16 (2006.01) F16F 15/02 (2006.01) G10K 11/178 (2006.01)

Patent

CA 2231071

Filtering means include a non-adaptive feedback filter (12) generating active framework vibration control without generating instability in a first frequency band, as well as an adaptive feedforward filter (130). The feedforward filtering coefficients (140) are adapted in real time according to an algorithm selected in order to minimise the energy of the vibration sensed by sensor means (8), depending on the energy of the vibration sensed by the sensor means (100) and the previously measured transfer function in the presence of the feedback filter means and in the absence of the feedforward filter means, between actuating means (10) and the first sensor means (8). The device is used to linearise feedback control throughout a second frequency band broader than the first, to accelerate the convergence of the minimising algorithm, and to improve the strength of the feedforward filter.

Les moyens de filtrage comprennent un filtre non adaptatif par rétroaction (12) engendrant une atténuation active des vibrations sur l'ossature, sans engendrer d'instabilité dans une première bande de fréquence, et un filtre adaptatif par anticipation (130). Les coefficients de filtrage (140) par anticipation sont adaptés en temps réel selon un algorithme choisi pour minimiser l'énergie des vibrations captées par les moyens capteurs (8) en fonction de l'énergie des vibrations captées par les moyens capteurs (100) et de la fonction de transfert, préalablement mesurée, en présence des moyens de filtrage par rétroaction et en l'absence des moyens de filtrage par anticipation, entre les moyens actionneurs (10) et les premiers moyens capteurs (8). Le dispositif permet de linéariser l'atténuation rétroactive dans toute une seconde bande de fréquences plus large que la première bande de fréquences, d'accélérer la convergence de l'algorithme de minimisation, et d'améliorer la robustesse du filtre par anticipation.

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