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Smart skins

This program aims at developing new distributed devices for structural control.

The concept is based on a network of passive and active cells distributed on a surface that constitute a “smart skin”, which is able to control the mechanical properties of the structure. The objective is togo up to the integration of adaptive and energetically autonomous cells, constituting a structural component that can produce internal coupling mechanisms for programming the functionality of interest, namely the structure’s reliability (Structural Health Monitoring of compositestructures) and/or vibroacoustic control (control of acoustic radiation, vibration damping, wave trapping…). This adaptive and hybrid composite material should be locally programmable at the cell’s size level by using a dedicated micro-architecture, including distributed smart materials, driving/networking electronics and computing.

Among others, this program will find applications in structural weight reduction (aeronautics, aerospace, automotive), by integrating reconfigurable functionalities in non-plane composite structures, using either integrated transducers/electronics or light/flexible non intrusive skin, and with a particular focus on energy management: low power or autonomous system are indeed required to have a chance to be deployed at large scale.

Challenges

1.Monitoring of damages on mechanical structures using embedded networks of sensors
2.Distributed control of vibrations or acoustic noise using architectured passive/active skins
3.Combination of strategies in dedicated networks and distributed hardware for management of the functions

 

Smart Skins for SHM of composites using acoustic emission

 

Active vibro-acoustic control

 

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