Multidisciplinary Unmanned Combat Air Vehicle-UCAV Design Optimization Using Variable Complexity Modeling

To improve design results while avoiding expensive computational cost, a variable complexity modeling (VCM) framework is studied and presented. The logical and systematical approach for aircraft conceptual design synthesis process is established. The code development and validation for each phase have been done for several types of aircraft. Moreover, the phase II parameterization and integration procedure are developed which allows the linking of design variables to to tal take-off gross weight (TOGW). The lift and drag are evaluated by using the high fidelity model in which lift coefficient is integrated in phase II by VCM approach and drag coefficient is used as an offline design value to the design process at cruise condition. The case study is applied to design UCAV and minimize the TOGW of UCAV.

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