基于SVM的航空发动机油样光谱诊断界限值制定

运用支持向量机(SVM)估计航空发动机油样光谱数据的概率密度函数,根据光谱数据的概率分布求出航空发动机光谱诊断各金属元素的质量分数、质量分数梯度及质量分数比例的正常、警告、以及异常界限值.利用实际的航空发动机光谱数据进行了研究,并与传统的基于正态分布假设下所确定的界限值进行了比较分析.结果表明,实际的航空发动机光谱数据...

Establishment of the threshold of oil spectrum analysis in the aircraft engine based on SVM

The probability density of the aircraft engine oil sample spectral data was estimated by using support vector machines(SVM).According to the probability distribution of spectral data,the normal,warning and abnormal threshold of the mass fraction,mass fraction gradient and the mass fraction ratio of aircraft engine were calculated based on spectroscopic diagnosis.This method was also verified by using the actual spectral data in aircraft engine.Through comparison and analysis of the threshold based on the normal distribution assumption,it shows that the actual spectral elements of aircraft engine are not entirely subject to normal distribution assumption,so the results established by SVM-based oil-like spectral threshold method are more genuine and reliable.