| 飞行器设计偏差量建模方法研究 |
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| 引用本文： | 高显忠,侯中喜,刘建霞. 飞行器设计偏差量建模方法研究[J]. 固体火箭技术, 2011, 34(5): 564-568 |
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| 作者姓名： | 高显忠 侯中喜 刘建霞 |
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| 作者单位： | 国防科技大学航天与材料工程学院,长沙,410073 |
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| 摘 要： | 对设计变量的偏差量进行建模,拟合偏差量服从的概率密度函数,是分析评价飞行器性能和概率设计的重要基础.针对常用分布拟合能力有限,以及混合Gamma分布无法在整个数轴上对试验数据进行拟合的问题,在论证混合Gauss分布拟合任意概率密度函数合理性的基础上,提出了利用混合Gauss分布对试验数据进行拟合,并运用期望极大化算法(...
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| 关 键 词： | 概率密度函数 混合高斯分布 期望极大化算法 偏差量建模 飞行器设计 |
Research on modeling of flight vehicle design deviations |
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| GAO Xian-zhong,HOU Zhong-xi,LIU Jian-xia. Research on modeling of flight vehicle design deviations[J]. Journal of Solid Rocket Technology, 2011, 34(5): 564-568 |
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| Authors: | GAO Xian-zhong HOU Zhong-xi LIU Jian-xia |
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| Affiliation: | GAO Xian-zhong,HOU Zhong-xi,LIU Jian-xia(College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | It lays an important foundation of analyzing and evaluatiyng the performance and probabilistic design of a flight vehicle that the design variables deviations and modelled and fit into a probability density function(PDF).For normal distribution limited in fitners and mixed Gamma distribution unable to be fit test data over the whole number axis,the method using mixed Gouss distribution to fit test data into arbitzazy functions was proposed after its rational demonstration,in which the parameters in Gauss mi... |
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| Keywords: | probability density function mixed Gauss distribution EM algorithm modeling of deviation flight vehicle design |
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