Conceptual design optimization of high altitude airship in concurrent subspace optimization

Multidisciplinary design optimization (MDO) is introduced to the conceptual design optimization of high altitude airship (HAA). The framework of concurrent subspace optimization (CSSO), as a MDO methodology, is established for HAA conceptual design. Three subsystems, including aerodynamic and propulsion, structure, and energy subsystem, are discussed in detail. The coupled information in subsystem analysis is supplied by the response surface approximations. And the shape of envelope and the location of solar array are optimized simultaneously with the goal of minimum total mass. In addition, the optimization process and an optimal design that includes shape of envelope, location of solar array and weight components, are obtained.