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| 基于小波分析的汽轮发电机组振动信号检测 | |
| 引用本文： | 周建萍,杨旭红,郑应平.基于小波分析的汽轮发电机组振动信号检测[J].上海电力学院学报,2008,24(3):263-265. |
| 作者姓名： | 周建萍 杨旭红 郑应平 |
| 作者单位： | 1. 上海电力学院,电力与自动化工程学院,上海,200090;同济大学,电子与信息工程学院,上海,200092 2. 上海电力学院,电力与自动化工程学院,上海,200090 3. 同济大学,电子与信息工程学院,上海,200092 |
| 基金项目： | 上海市高校优秀青年教师后备人选科研项目，上海市重点学科建设项目 |
| 摘 要： | 汽轮发电机组的余弦突变及倍频突变是现场常见的振动故障,模拟了一个正弦振动信号分别产生余弦突变和倍频突变,并利用db5小波对此故障信号进行5层分解得到5层细节信号.故障信号分解的细节部分清晰地显示了奇异点的准确位置.仿真结果证明了小波分析用于汽轮发电机组振动信号检测的可行性和有效性,从而为汽轮发电机组振动信号的故障诊断提供有力依据. |
| 关 键 词： | 小波分析 故障信号 检测 汽轮发电机组 |
| 收稿时间： | 2008/6/19 0:00:00 |
Check of Vibration Signals for Turbo-generator Units Based on Wavelet Analysis |
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| ZHOU Jian-ping,YANG Xu-hong and ZHENG Ying-ping.Check of Vibration Signals for Turbo-generator Units Based on Wavelet Analysis[J].Journal of Shanghai University of Electric Power,2008,24(3):263-265. | |
| Authors: | ZHOU Jian-ping YANG Xu-hong and ZHENG Ying-ping |
| Affiliation: | School of Electric Power and Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China;School of Electronics and Information Engineering, Tongji University, Shanghai 200092, China,School of Electric Power and Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China and School of Electronics and Information Engineering, Tongji University, Shanghai 200092, China |
| Abstract: | Dramatic change of cosine and multiple frequency is common vibration fault of turbo-generator units.The sine vibration signal is simulated to make cosine and multiple frequency change.The proposed signal is decomposed into 5 layers with db5 wavelet and the detail signal of 5 layers can be obtained.The discontinuity is located accurately and clearly in the detail signal.The simulation results prove it feasible and valid to check the vibration signals for turbo-generator units based on wavelet analysis,which provides support for fault diagnosis of vibration signals for turbo-generator units. |
| Keywords: | wavelet analysis fault signal check turbo-generator unit |
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