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将6σ质量控制理论用于空射巡航导弹的概念设计中,按照多学科设计优化的理论建立了涉及结构外形、质量、动力、弹道和气动5个子学科的空射巡航导弹概念模型,对该模型进行了多学科设计优化和6σ稳健性优化,对比了二者的输出响应。应用6σ质量控制方法后,未达到质量控制约束的射程和最大飞行速度均改善到了6σ水平,从而得到了稳健的系统方案。稳健方案在1 000次蒙特卡洛系统仿真中,射程和最大飞行速度约束可靠概率均为100%。在设计参数波动5%的情况下,稳健方案射程的波动幅度比最优方案减小了61%,最大飞行速度波动幅度减小了57%。研究表明,应该在国防产品设计阶段尽可能早的应用质量控制方法,而不是单纯追求系统某些性能的最优化。6σ质量控制方法是一种提高产品可靠性和性能稳定性的有效方法,在现代产品设计中具有很大的推广和应用价值。
In the concept design of air-launched cruise missiles, 6σ quality control theory was used to establish the conceptual model of air-launched cruise missiles involving five sub-disciplines: structure shape, mass, power, trajectory and aerodynamics according to the theory of multidisciplinary design optimization. Multidisciplinary design optimization and 6σ robust optimization were performed, and the output responses of the two were compared. After the 6σ quality control method is applied, the range and the maximum flight speed that do not reach the quality control constraints are all improved to 6σ, and a robust system solution is obtained. Robust Solution In 1000 Monte Carlo system simulations, both the range and maximum flight speed constraints have a 100% probability of reliability. When the design parameters fluctuate 5%, the range of the robust scheme is reduced by 61% over the optimal scheme and the maximum fluctuation of the flight speed is reduced by 57%. Research shows that quality control methods should be applied as early as possible in the design phase of national defense products, rather than simply pursuing the optimization of certain performance of the system. 6σ quality control method is an effective method to improve product reliability and performance stability, and has great promotion and application value in modern product design.