摘要
三阶累量能有效去除高斯噪声,而且其对角累量能有效保持信号特征,由其产生的1(1/2)维谱可以显示信号的二次相位耦合信息。实验中通过计算故障信号和正常信号的三阶对角累量信息,然后利用这些信息进行具体的故障判别。实验结果取得了令人满意的效果。
Three-order cumulant can eliminate the Gaussiar, background noise and keep signals features effec- tively. The 1 （1/2） dimensional spectrum originated from it can display the signal of quadratic phase coupling information. The vibration signals of relief valve in normal and anormal situations were collected in the experi- ment. Three-order diagonal cumulants of collected signals were calculated out, the feature vector was extrac- ted, and then the fault diagnosis was conducted with least squares vector machine. The experiment indicates that the validity is above 80% and the method is feasible.
出处
《重型机械》
2012年第3期129-132,共4页
Heavy Machinery
基金
国家自然科学基金(50975098)
福建省教育厅A类科技项目(JA11342)
关键词
三阶对角累量
1(1/2)维谱
故障诊断
three-order diagonal cumulant
1 （1/2） dimensional spectrum
fault diagnosis
