Nonlinear Mechanical Analysis And Driving System Of Trailing Edge

By changing the wing’ geometry parameters, the variant aircraft can ensurethat the aircraft has maintained a optimal aerodynamic characteristics throughoutthe voyage, and it can expand the aircraft’s flight envelope, so that the aircraftcan perform a variety of missions.To optimize the aerodynamic performance ofthe aircraft, make the wing surface be always smooth during the flexibledeformation process and avoid the slope of the mutations of the airfoil during thedeformation of the wing, the flexible trailing edge cancel the mechanical hinge.Meanwhile, seamless, flexible deformation of the wing surface can effectivelyreduce the radar echo, which can increase the performance of stealth aircraft. Forcivil aircraft, the flexible adaptive wing optimizes the aerodynamiccharacteristics during the entire flight, reduces the fuel consumption andimproves the economic benefits of aircraft. Therefore, regardless of the anglefrom the military or civilian, flexible adaptive wing technology has goodprospects and deep research meaning.In flexible adaptive techniques, it is the focus of the research to make theflexible deformable trailing edge structure come true. The selection of the driveand the means of the driving force in the trailing edge structure is thedifficulties in this field, the conventional driving methods are difficult toeffectively solve this problem. A cable net force transmission mode is presentedin this paper. Research shows that cable network drive have high forceamplification factor and driving efficiency. The cable net transmissionmechanism for structural is optimized. And to further improve the drivingefficiency of the cable net structure, the initial parameters of the cable net isfixed.Combined with the deformation theory, the flexible drive cable net structuretrailing edge deformation test was experimented. The results show that cable netmechanism has superior transmission efficiency than a single cable, the testresults are consistent with the theoretical value. The cable network transmissiondeformation theory is verified by deformation test. A test optimization isproposed for the cable nets, such as reducing the height limit devices.Flexible trailing edge structure is the core parts to achieve a flexible variantfor the variant aircraft. Flexible trailing edge is a highly complex integratedstructure, it constituted by the high performance drives, large deformation skinmaterial, flexibly-deformable substrate, and internal support structure and thetransmission structure. Pneumatic muscles is selected as a flexible trailing edge high-performance drives in this paper, it can produce a large driving force, thereaction is sensitive and easy to be controled. The creative applicable cable netstructure and the driving force transmission mechanism are effectively improvethe efficiency of the drive. A new type of composite material skin is explored,which is bonded together by rubber sheet and spandex fibers and has manyadvantages of both materials.