Intelligent Active Nonlinear Vibration Control of Four-Corner Simply Supported Bi-Stable Laminates Based on Fuzzy Controller
摘要
Bistable laminates (BL) have garnered significant attention due to their broad application potential in morphing structures, particularly for their stable configurations, inherent vibration characteristics, snap-through behavior, and nonlinear dynamic responses under various loads. However, limited research has been conducted on the intelligent active nonlinear vibration control of BL. This study aims to investigate, for the first time, the intelligent active vibration control of four-corner simply supported bistable laminates using a fuzzy controller.
MethodsA 14-parameter polynomial configuration function is employed, and within the framework of the first-order shear deformation theory (FSDT) and the Rayleigh–Ritz method, the stable configuration of cross-ply BL with Macro Fiber Composite (MFC) is determined. The electromechanical coupling nonlinear dynamic system under various impact loads is modeled using the Lagrange equation. For active intelligent control, the principal curvatures and their derivatives are used as inputs, while the control voltage determined by thefuzzy inference system serves as the output. An intelligent self-adjustable fuzzy vibration control system is implemented in MATLAB.
ResultsSimulation results confirm that the proposed fuzzy controller demonstrates superior efficiency and stability in controlling the vibration of bistable laminates. The vibrations of the BL are rapidly attenuated under the influence of the fuzzy controller. Additionally, an in-depth investigation into the vibration control performance of square bistable laminates with varying geometrical parameters under different load types is conducted, further validating the robustness and adaptability of the proposed control approach.