Akademik Veri Yönetim Sistemi
Results in Engineering, cilt.29, 2026 (ESCI, Scopus)
Excessive vibrations in lightweight structures, such as sandwich composite plates, can lead to performance degradation, fatigue failure, or discomfort in precision applications. Specifically, suppressing the first three coupled modes (including the 1st out-of-plane bending and 1st torsional modes) is crucial, as these modes often form the basis for aeroelastic instabilities like flutter in composite wing structures. To address this challenge, this study presents an active vibration control strategy for suppressing the first three vibration modes of a smart sandwich plate. The proposed method combines a novel curvature-based algorithm for optimal actuator placement with pole placement control for targeted vibration attenuation. The smart structure integrates piezoelectric patches as both sensors and actuators, strategically embedded based on the vibrational characteristics of the base plate. A finite element model and experimental frequency response functions (FRFs) guide the placement and controller design. Ten test cases involving free and forced vibrations validate the approach. Following experimental system identification, transfer functions are derived and used to tune the active controllers. The results demonstrate that the designed control system effectively attenuates each targeted mode, individually and simultaneously, without compromising performance. The study presents a practical and efficient framework for mitigating vibrations in smart structures, thereby contributing to the broader advancement of intelligent adaptive materials in aerospace, automotive, and precision engineering applications.