Multi-Mode Shape Control of Active Compliant Aerospace Structures Using Anisotropic Piezocomposite Materials in Antisymmetric Bimorph Configuration

The mission performance of future advanced aerospace structures can be synthetically improved via active shape control utilizing piezoelectric materials. Multiple work modes are required. Bending/twisting mode receives special attention for many classic structures, such as reflector systems, blades, and compliant morphing wings. Piezoelectric fiber composite (Piezocomposite) material features in-plane anisotropic actuation, which is very suitable multiple modes. In this study, two identical macro-fiber (MFC) actuators the F1 type were bonded to base plate structure in an “antisymmetric angle-ply bimorph configuration” order achieve independent bending/twisting control. terms finite element model homogenization strategy, locations MFCs determined by considering effect trade-off capabilities on bending twisting shapes. modal characteristics investigated both experimental theoretical approaches. tests implied that accuracy was heavily reduced due various uncertainties nonlinearities, including hysteresis creep actuators, errors, external disturbances. A multi-mode feedback law designed indicated synthetic (independent coupled) deformations achieved with accuracy. This study provides a feasible approach high surface accuracy, especially employing piezocomposite