Cedrat Technologies, innovation in mechatronics

This paper presents two approaches for structural damage identification, each based on a different philosophy. The Virtual Distortion Method is a model-updating method of damage assessment, utilizing gradient-based optimization techniques to solve the resulting inverse dynamic problem in the time domain. Case-Based Reasoning is a soft-computing method utilizing wavelet transformation for signal processing and neural networks for training a base of damage cases to use for retrieving a similar relevant case.

Detecting microscopic structural vibrations for monitoring storage tanks with piezoelectric transducers.

Piezoelectric transducers adopted for storage tank monitoring: the results.

This article deals with a stress sensor for cables which has been designed, built and test. it is based on a special magnetostrictive effect of ferromagnetic materials as high elastic limit steels used for bridge cables or prestressed concrete.

Continous interest from the French Navy (DRET and CERDSM) has permitted significant improvements to magnetostrictive transducers in order to produce low-frequency high-power sonar sources. These improvements can be appreciated by looking at three transducers.