液体火箭发动机故障诊断中的特征优选策略

针对液体火箭发动机故障诊断中的特征选择问题，提出了一类最小代价模糊决策模型。在应用中，该模型能够融合各个故障特征参数的先验信息、故障程度，并允许故障间的关联存在，从而比现有特征选择方法具有广泛的适用性，特征选择结果更贴近工程实际。同时，给出了基于贪婪算法的模型求解方法，并对某发动机的故障特征集进行了特征优选实验。实验证明了该方法的有效性。

An optimized feature selection strategy in liquid rocket engine fault diagnosis

To solve the problem of feature selection in liquid rocket engine fault diagnosis,a fuzzy decision model constrained by the minimum cost is proposed in this paper. In this model,the prior information of each feature and fault intensity is taken into consideration,and the association between different faults is allowed. Accordingly,it is more flexible than other models,and the feature selection results are more suitable for engineering applications. In addition,a greedy algorithm is provided to solve the mod...