Multi-level of Fidelity Multi-Disciplinary Design Optimization of Small, Solid-Propellant Launch Vehicles

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  • ROSHANIAN Jafar
    MDO Laboratory, Department of Aerospace and Mechanical Engineering, K.N. Toosi University of Technology
  • JODEI Jahangir
    MDO Laboratory, Department of Aerospace and Mechanical Engineering, K.N. Toosi University of Technology
  • MIRSHAMS Mehran
    MDO Laboratory, Department of Aerospace and Mechanical Engineering, K.N. Toosi University of Technology
  • EBRAHIMI Reza
    MDO Laboratory, Department of Aerospace and Mechanical Engineering, K.N. Toosi University of Technology
  • MIRZAEE Masood
    MDO Laboratory, Department of Aerospace and Mechanical Engineering, K.N. Toosi University of Technology

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A new automated multi-level of fidelity Multi-Disciplinary Design Optimization (MDO) methodology has been developed at the MDO Laboratory of K.N. Toosi University of Technology. This paper explains a new design approach by formulation of developed disciplinary modules. A conceptual design for a small, solid-propellant launch vehicle was considered at two levels of fidelity structure. Low and medium level of fidelity disciplinary codes were developed and linked. Appropriate design and analysis codes were defined according to their effect on the conceptual design process. Simultaneous optimization of the launch vehicle was performed at the discipline level and system level. Propulsion, aerodynamics, structure and trajectory disciplinary codes were used. To reach the minimum launch weight, the Low LoF code first searches the whole design space to achieve the mission requirements. Then the medium LoF code receives the output of the low LoF and gives a value near the optimum launch weight with more details and higher fidelity.

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