Active Flutter Suppression of Smart-Skin Antenna Structures with Piezoelectric Sensors and Actuators

• Main Authors: Chang-Yull Lee, Ji-Hwan Kim
• Format: Article
• Language: English
• Published: MDPI AG 2021-09-01
• Series: Aerospace
• Subjects: smart-skin antenna structure; active flutter control; LQR control algorithm; piezoelectric sensor and actuator
• Online Access: https://www.mdpi.com/2226-4310/8/9/257

A smart-skin antenna structure is investigated for active flutter control with piezoelectric sensors and actuators. The skin antenna is designed as a multilayer sandwich structure with a dielectric polymer to perform the role of antenna or radar structures. The governing equations are developed according to the first-order shear deformation theory, and von Karman strain–displacement relationships are used for the moderate geometrical nonlinearity. To consider the supersonic airflow, first-order piston theory is performed for the aerodynamic pressures. The linear quadratic regulator (LQR) method is applied as a control algorithm, and Newmark’s method is studied to obtain the numerical results. In the present study, the effects of placements and shape of piezoelectric patches are discussed on the flutter control of the model in detail. In addition, the numerical results show that the skin antenna model can effectively suppress the panel flutter behaviors of the model, optimal conditions of piezoelectric patches are obtained for skin antenna structures.