Collaborative Optimization Research Of The Wing Aerodynamic And Structural Analyses For An UAV Based On ISIGHT

Aircraft design is a complex system engineering and deals with multi-disciplinary, multi-technology and intersection between them. More and more disciplinaries are involved, and more and more detailed specialities are divided. The design period becomes more and more longer, and the development cost becomes more and more higher. Analysis and optimization design for the single-disiplinary already are more mature, but it is difficult to establish a unified analysis and optimization mathematical model for the complex system at present. Because of the multi-variables included, requirements of the design objectives and design variables for the various disciplinary are mutually coupled and conflicted. Hence, it is require an efficient design optimization method suited to aircraft such as the complex system engineering.Multidisciplinary Design Optimization (MDO) just is an effective method to solve the design of the complex engineering system including the physical phenamena with the mutual coupling and compostd of the serveral different interactive subsystems. Therefore, to go deep into research of MDO for aircraft has important theoretical significance and practical value.The major multi-disciplinary optimization technologies are studied and compared in this thesis. The collaborative optimization method adapted the wing aerodynamic and structural analyses for an UAV. The wing aerodynamicforces to an UAV are optimized and at the same time its structural optimization is carried out. The lift-to-drag ratio of aircraft and the optimal weight of wing structure have been realized at the same time to satisfy the overall objective of the longest endurance.