CONTROLE BAY FOR HYBRID BENCH


As part of the vulnerability assessment of civil engineering works against seismic hazards, CEA Saclay's ESMI laboratory conducts tests on full-scale or small scale buildings using vibrating tables set in motion by high power hydraulic actuators.

An alternative to these large scale tests is to conduct “hybrid” tests where only part of the most sensitive construction work is physically tested using hydraulic actuators, while the less used parts whose behavior is less known may be simulated. To conduct such tests, its necessary to have a system capable of acquiring signals delivered by captors, control actuators, capable of carrying out complex simulation calculations in “real time” during the test.

The CEA has chosen to place the provision of this system “Baie de contrôle pour banc hybride” in the hands of NEXEYA following an open tender procedure. The proposed solution is currently under development in Montescot. In the software, the solution is based on the MAGALI nucleus to acquire the generation of signals and the KALLISTE software for data visualisation during the tests on a remote workstation. The complex calculation libraries developed by the CEA (under Matlab for instance) interfaces with the MAGALI nucleus to provide the computing power required, an extra GPU card was installed in the calculator to allow the most demanding operations to be exported using the SDK CUDA (operation on the matrices notably). The complementarity of the software products MAGALI and KALLISTE and their modularity enabled us to win the contract by reducing the specific development costs and thus proposing a very competitive offer.

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