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.
Highlights
A smart-skin antenna structure is investigated for active flutter control with piezoelectric sensors and actuators
Numerical results are obtained for the positions and sizes of the piezoelectric patches for active flutter control of the smart-skin antenna structure
Upon comparing the areas of stable regions of the two types, we find that the stability conditions of the Model (II) are better than those of Model (I) because the patch of Model (II) is placed near the peak amplitude for the model; the performance of the patch is more effective, and similar results are presented in Ref. [23]
Summary
A stealth technology for military aircrafts has been one of the hot topics, and advanced technologies for the new composition have been suggested over the last several decades. The smart-skin antenna structure as a kind of MAS has been widely investigated to improve both structural efficiency and antenna performance. In this regards, Varadan and Varadan [1] suggested the smart-skin antenna structure as a conformable load-bearing antenna structures (CLAS) using composite materials. Daliri et al [5] investigated composite materials for the mechanical and electromagnetic performance of slot log-spiral antenna structures. Lam et al [13] studied the vibration control of a comcomposite plate with distributed piezoelectric sensors and actuators. Range.InIn this work, a smart-skin antenna structure is studied for flutter suppression using piezoelectric sensors and actuators. Magnetic characteristics of the are our focus in this study
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