A self-mixing laser sensor design with an extended kalman filter for optimal online structure analysis and damping evaluation

Caroline Bès (1) , Victorien Belloeil , Guy Plantier , Yves Gourinat (2) , Thierry Bosch (1)

1 ENSEEIHT - Ecole Nationale Supérieure d'Electrotechnique, d'Electronique, d'Informatique, d'Hydraulique et de Télécommunications
2 DMSM - Département de Mécanique des Structures et Matériaux

We have developed a new algorithm based on the extended Kalman filter, in order to improve the resolution of an optical displacement sensor. This new non contact sensor which provides vibration measurement with a very good accuracy might be used for online quality control by measuring the damping of excited mechanical structure. This self-mixing sensor subject to weak feedback has been tested in comparison with a commercial vibrometer, to measure the frequency response function of a plate with a passive damping to be characterized, in order to show the efficiency of a damping treatment.

Mots clés: Displacement sensors; Optical interferometry; Vibration measurement; Extended Kalman filter; Structure analysis

Domaines: Micro et nanotechnologies/Microélectronique

Caroline Bès, Victorien Belloeil, Guy Plantier, Yves Gourinat, Thierry Bosch. A self-mixing laser sensor design with an extended kalman filter for optimal online structure analysis and damping evaluation. IEEE/ASME Transactions on Mechatronics, 2007, 1 (3), pp.387-394. ⟨10.1109/TMECH.2007.897287⟩. ⟨hal-03610168⟩