Abstract
The collaboration pursuing method (CPM) is a computationally efficient approach for deterministic multidisciplinary design optimization (MDO). However, it has not been employed to handle problems with uncertainty. Moreover, obtaining actual uncertainty probability distributions is challenging. Compared to probability distributions, the interval information of uncertainties can be more easily obtained. Thus, multidisciplinary robust design optimization (MRDO) under interval uncertainty has been widely investigated. To overcome the inefficiency of existing methods for solving MRDO, this paper proposes an improved collaboration pursuing method (ICPM). In this method, the collaboration model (CM) is utilized to filter the samples that satisfy the coupled state equations in system analysis (SA) or multidisciplinary analysis (MDA). Then, a robustness discrepancy model (RDM) is developed to efficiently select candidate samples that meet the robustness requirements. Next, the mode pursuing sampling (MPS) method is utilized as a global optimizer to drive the optimization process and identify the robust optimum. Finally, a mathematical example and two engineering examples are utilized to evaluate the feasibility and effectiveness of the proposed method.
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This work was supported by the National Natural Science Foundation of China [grant numbers 51675196 and 51721092] and the Program for HUST Academic Frontier Youth Team.
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Appendix
Appendix
1.1 Aircraft sizing problem
The details of the model are given in Table 16. The empty weight includes four parts: (1) the aircraft structure, (2) the landing gear, (3) the propulsion system, and (4) the equipment.
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Li, W., Xiao, M. & Gao, L. Improved collaboration pursuing method for multidisciplinary robust design optimization. Struct Multidisc Optim 59, 1949–1968 (2019). https://doi.org/10.1007/s00158-018-2165-2
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DOI: https://doi.org/10.1007/s00158-018-2165-2