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

Abstract

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.

Transonic Buffet Active Control with Local Smart Skin

“…The deformable wing includes folding wing [18], flexible trailing edge [19], adaptive wingtip [20], active camber wing [21] and smart skin [22]. To enhance the performance of the aircraft, researchers use wings with variable camber [23,24], variable thickness [25], variable trailing edge deflection [19,26], and deformable winglets [27] to improve aerodynamic performance; use adaptive wings with adjustable maximum height and maximum height position to improve stall aerodynamic performance [28]; use deformable wings to adapt to different flight environments [29]; use flexible trailing edges to reduce structural weight of swept-wing aircraft [30]; use deformable trailing edges to control the boundary layer flow to reduce noise [31]; use adaptive wingtips to reduce fuel consumption and gust loads through cant, twist, and camber deformation [20]; use smart skin to adjust the inlet shape to make the engine have good performance over a wide range of rotation speed range [32]; and use smart skin to suppress panel flutter [33] and wing flutter [34]. In this study, smart skin technology is used to suppress the fluctuating load of transonic buffeting flow.…”

Optimization of Coverage and Capacity Using Smart Antennae

“…These designs enable signals to be utilized more effectively during both reception and transmission, thereby achieving communication or sensing objectives [13,14], In order to simultaneously maintain a high base station coverage rate and effectively reduce UE interference issues, this study employed intelligent adaptive directional antennas for the Many scholars have proposed innovative smart antenna designs based on antenna theory. These designs enable signals to be utilized more effectively during both reception and transmission, thereby achieving communication or sensing objectives [13,14], In order to simultaneously maintain a high base station coverage rate and effectively reduce UE interference issues, this study employed intelligent adaptive directional antennas for the base stations. Unlike traditional omni-directional antennas, where the antenna gain remained the same at different angles, intelligent adaptive directional antennas can control the signal strength in different directions, resulting in varying antenna gains for terminal devices at different angles.…”