基于改进型球结构支持向量机的故障诊断方法及其应用  

Fault diagnosis based on improved sphere support vector machines

作　　者：袁胜发[1] 褚福磊[1] 

机构地区：[1]清华大学精密仪器与机械学系

出　　处：《推进技术》2006年第1期1-4,47,共5页Journal of Propulsion Technology

基　　金：国家杰出青年科学基金(50425516);教育部跨世纪优秀人才培养计划基金资助

摘　　要：在涡轮泵等机械设备的故障诊断中,多类故障诊断是经常出现的问题。为提高多类故障诊断速度,在球结构支持向量机的基础上,对其分类规则进行改进,充分考虑分类球的大小不同,经过理论分析和实验验证得到样本点落在分类球外和分类球重叠区域的最佳分类公式。用该算法和其它几种常用算法对涡轮泵模拟故障进行分类比较,结果表明,基于改进型球结构支持向量机的故障诊断算法学习速度更快,诊断效果好。Multi-category faults were common in turbo-pump and other machines. In order to speed up the multi-category faults diagnosis, an improved sphere support vector machine was proposed in this paper. The sizes of class spheres are fully taken into account, and better classification rules outside the spheres and in the intersections of the spheres are derivated by many theoretic analyses and experiments. This new method and several other normal methods are used in the diagnosis of simulated multi-category faults in turbo-pump. Results show that the diagnosis time is much shorter and the diagnosis correct rate is high with the improved sphere support vector machines.

关 键 词：涡轮泵 故障诊断 球结构支持向量机 多类算法 

分 类 号：V434.21[航空宇航科学与技术—航空宇航推进理论与工程]