A Self-Mixing Laser Sensor Design With an Extended Kalman Filter for Optimal Online Structural Analysis and Damping Evaluation

• Published in: IEEE/ASME transactions on mechatronics Vol. 12; no. 3; pp. 387 - 394
• Main Authors: Bes, C., Belloeil, V., Plantier, G., Gourinat, Y., Bosch, T.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Damping; Displacement sensors; Extended Kalman filter; Feedback; Mechanical sensors; Mechanical variables measurement; Mechatronics; On-line systems; Online; Optical design; Optical feedback; Optical filters; optical interferometry; Optical sensors; Quality control; Samarium; Sensors; structural analysis; Vibration measurement
• ISSN: 1083-4435; 1941-014X; 1941-014X
• DOI: 10.1109/TMECH.2007.897287

We have developed a new algorithm based on the extended Kalman filter in order to improve the resolution of a self-mixing (SM) optical displacement sensor. This noncontact sensor, which provides vibration measurement with a very high accuracy, can be used for online quality control, for example, measuring the damping of excited mechanical structures. This SM sensor subject to weak feedback has been tested in comparison with a commercial vibrometer in order to measure the frequency response function (FRF) of a plate with a passive damping to be characterized, and to show the efficiency of a damping treatment.