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| 航空发动机转子碰摩故障信号广义S变换方法 | |
| 引用本文： | 张志禹,吕延军,张九龙.航空发动机转子碰摩故障信号广义S变换方法[J].交通运输工程学报,2007,7(3):25-28. |
| 作者姓名： | 张志禹 吕延军 张九龙 |
| 作者单位： | 1. 西安理工大学,自动化与信息工程学院,陕西,西安,710048 2. 西安理工大学机械与精密仪器工程学院,陕西西安,710048 3. 西安理工大学计算机科学与工程学院,陕西,西安,710048 |
| 基金项目： | 国家自然科学基金 , 国家高技术研究发展计划(863计划) |
| 摘 要： | 为了有效提取航空发动机转子碰摩故障信号,提高碰摩故障诊断的准确性,采用广义S变换方法,把碰摩信号变换到相空间中,在相空间检测和提取故障特征,并与连续小波变换的结果进行了比较。变换分析结果表明:在广义S变换域可以更清楚地反映出信号的时频局域化特性和奇异点位置,易于检测出碰摩点的位置,广义S变换有较好的抗干扰能力,在变换域易于信号与噪声的分离。 |
| 关 键 词： | 航空发动机 故障诊断 广义S变换 小波变换 转锭碰摩 |
| 文章编号： | 1671-1637（2007）03-0025-04 |
| 修稿时间： | 2007-02-15 |
Generalized S-transform method of rotor impact-rub fault signal of aeroengine |
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| Zhang Zhi-yu,Lu Yan-jun,Zhang Jiu-long.Generalized S-transform method of rotor impact-rub fault signal of aeroengine[J].Journal of Traffic and Transportation Engineering,2007,7(3):25-28. | |
| Authors: | Zhang Zhi-yu Lu Yan-jun Zhang Jiu-long |
| Abstract: | In order to effectively pick out the impact-rub fault signal of aeroengine rotor,improve fault diagnosis veracity,the impact-rub signal was transformed to phase space by using generalized S-transform,the features of fault signal were detected in phase space,and the results obtained by using generalized S-transform(GST) and continuous wavelet transform(CWT) were compared.Comparison result shows that the time-frequency localization characteristics and singular points of impact-rub signal are more distinct in GST domain than in CWT domain,the impact-rub points are easier to be detected,GST has strong capability in noise reduction,and the separation of signal and noise is also available in GST domain.6 figs,7 refs. |
| Keywords: | aeroengine fault diagnosis generalized S-transform wavelet transform rotor-to-stator impact-rub |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |