## 留言板

 引用本文: 孟晓风, 季宏, 王国华, 等 . 计算故障先验概率的最大熵方法[J]. 北京航空航天大学学报, 2006, 32(11): 1320-1323.
Meng Xiaofeng, Ji Hong, Wang Guohua, et al. Maximum entropy method for fault prior probabilities[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1320-1323. (in Chinese)
 Citation: Meng Xiaofeng, Ji Hong, Wang Guohua, et al. Maximum entropy method for fault prior probabilities[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1320-1323. (in Chinese)

• 中图分类号: TP 18

## Maximum entropy method for fault prior probabilities

• 摘要: 为了解决故障先验概率估算不准的问题,提出了基于最大熵的故障先验概率的计算模型.该模型以相关的先验信息作为最大概率估计的约束条件,并通过拉格朗日函数,将故障先验概率估算问题转化成无约束优化问题.为了实现对无约束优化问题的快速求解,提出了一种基于最速下降法和牛顿法的混合梯度算法;并且,针对大规模系统中故障变量过多的情况,依据系统分解的原则,将高维故障空间分解为多个低维故障空间,给出了低维故障空间求解的快速计算方法.通过最大熵方法和故障平均间隔(MTTF,Mean Time To Failure)方法的结果比较,证明最大熵方法更具准确性.

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##### 出版历程
• 收稿日期:  2006-04-30
• 刊出日期:  2006-11-30

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