Smart Hybrid Piezoelectric Vibration Control Scheme in Composite Sandwich Panels with MRE Core

In the present paper, vibration attenuation ability of the composite MRE sandwich beam affixed with piezoelectric patches on the face layers in supersonic flow regime is studied. The aerodynamic pressure developed due to supersonic flow is modelled by piston theory. The dynamic equations of the structural system are obtained using Hamilton principle and the solution is arrived via finite element approach. A linear quadratic regulator (LQR) is employed as a controller to the system to enhance the flutter stability of the composite MRE sandwich beam. To investigate the effectiveness of the control system on the sandwich beam with MRE core and piezo patches, the time-domain responses are obtained using the Runge–Kutta technique while external gust loads are applied. The critical aerodynamic pressure of the structure is improved by the piezoelectric patches on the surface of the sandwich beam, and it leads to an increase in the aeroelastic stability of the composite sandwich structure. LQR control scheme supplies appropriate actuation voltages that can efficiently suppress the vibration response of the beam.