Design And Analysis Of The Adaptive Trailing Edge Actuated By Piezoelec Tric Fiber Composite

Adaptive wing were designed by purely mechanical solutions with traditionalactuators, have additional mechanical complexity and weight. Choose Piezoelectricmaterials as the morphing actuators implemented in adaptive wing has manyadvantages, such as simpler structure forms, lighter structure weight, lower powerconsumption, etc. MFC(Marco Fiber composite) is a piezoelectric fiber compositematerial consists of piezoelectric fibers, resin phase and interdigitated electrodestructure, has excellent actuating and sensing properties. However, there are still twomain challenges should be solved. Firstly, MFC require high voltage input and wideoperation voltage range. Secondly, in order to achieve greater deformation, softer andthinner sheet structure should be chosen due to the small actuation displacements. atthe same time, the structure should stiff enough to prevent flutter and divergence. thisis the central challenge in developing a morphing wing. This paper designed andanalyzed a kind of adaptive trailing edge based on MFC actuator by finite elementmethod and test.This paper choses MFC as the actuator, designed and analyzed the adaptivetrailing edge of the wings by finite element method and test.Usually, trailing edge has large deformation, beyond the small deformationhypothetical category. Therefore, this paper studied the mathematical modelingapproach and solving methods for finite element analysis for geometrically nonlinearproblems in chapter2.Because of the complex structure of the MFC, analyze its property by FEMdirectly is almost impossible. This article describes the modeling and analysismethods of piezoelectric materials in FEM in chapter3. then, equivalent thepiezoelectric composite material to monolithic piezoceramics. On this basis, theanalysis methods for piezoelectric smart structure is established.In chapter4, a MFC-based adaptive piezoelectric trailing edge structure isdesigned and analyzed. Including the piezoelectric actuators and structure form’schoice, the piezoelectric actuators’ operating circuit design, control strategies of thestructure. Afterwards, a finite element simulation of the structure is presented.Finally,this paper describes the feasibility of the piezoelectric adaptive trailing edge.