Conceptual design optimization of stratosphere airship based on improved CO-RS

An improved collaborative optimization based on response surface (CO-RS) methodology was developed to be well applied to the engineering design. The response surface was constructed independent on gradient by augmented Lagrange and trust region optimization methods. System mission requirements and disciplinary coupling relations of stratosphere airship were analyzed in the framework of improved CO-RS. multidisciplinary design optimization (MDO) model coupled with dynamics and propulsion subsystem, structure subsystem, and energy subsystem analysis models was established with total mass as the objective for stratosphere airship conceptual design. Using the iSIGHT software to construct the solving architecture, the MDO model and analysis models were simulated and calculated with the improved CO-RS methodology. The results prove the rationality of the MDO model and the effectiveness of the improved CO-RS methodology in stratosphere airship conceptual design optimization.