Blended wing body aircraft with morphing design has a large potential to enhance flight performance and achieve cross-domain flight.The challenge is to design a lightweight structure that is capable of withstanding loads,but is also able to change shape.Firstly,aerodynamic characteristics of aircraft in typical deformation states are analyzed and deformation states are presented.It is pointed out that spanwise and chordwise changes of wing configuration can effectively extend the flight envelope and adjust the static stability.Secondly,distributed heterogeneous linkage mechanism is proposed to realize bi-directional deformation of the aircraft.Thirdly,in order to solve the contradiction between deformation and load-carrying,beams based on topology optimization are designed according to the characteristics of aerodynamic loads in each deformation state.In consideration to weight reduction,the integrated design of deformation/load-carrying is realized.Finally,on the basis of simulation analysis,the prototype is processed to test its deformation capacity.The results show that the cross-domain blended wing body morphing aircraft can change shape to withstand various loading conditions and achieve agile flight across wide speed and space domain.
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