应用6σ质量控制方法的空射巡航导弹概念设计

The application of 6σ quality control approach to conceptual design of air-launched cruise missiles

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。

6σ quality control was applied to the conceptual design of air-launched cruise missile.The conceptual model of air-launched cruise missile was then built based on multi-disciplinary design optimization（MDO） theory.It involves five disciplines,namely structure,weight,propulsion,trajectory and aerodynamic.Traditional optimization and 6σ robust optimization（RO） were conducted based on the model and the responses compared.The unsatisfied constraints in optimum were improved to 6σ level.The system reliability was 100% during 1 000 times experiments of Monte Carlo Sampling.The deviation margin was reduced by 61% compared to that of optimum design and the deviation margin of maximum rudder deflection reduced by 65%,while the deviation margin of maximum velocitywas reduced by about 57%.The results indicate that quality control measures should be taken as early as possible in design phase.6σ quality control approach is effective in improving the reliability of products and enhancing the stability of products performance.