Robust passive control methodology and aeroelastic behavior of composite panels with multimodal shunted piezoceramics in parallel

Abstract

The increasing use of composite materials in the aeronautical industry has made it possible to build lighter structures with better mechanical properties. Since lighter structures tend to be more flexible, undesirable vibrations and noise are increased and strategies that improve the aeroelastic stability are key issues to be addressed. With the use of intelligent materials, it is possible that the structure has the ability to dissipate energy and stabilize itself when subjected to external dynamic loadings imposed by airflow. This work demonstrates the feasibility of using a passive control tool to increase the supersonic flutter boundary of composite panels using a multimodal shunted piezoceramic in parallel topology. For an application of industrial interest, uncertainties in the electrical parameters of the shunt circuit are considered in the control system design. Numerical applications are presented and the main features and capabilities of the proposed methodology are highlighted.