| 基于特征频率功率谱方差的故障实时检测 |
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| 引用本文： | 徐惠钢,薄煜明,杜国平. 基于特征频率功率谱方差的故障实时检测[J]. 东南大学学报(自然科学版), 2003, 33(Z1): 130-133 |
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| 作者姓名： | 徐惠钢 薄煜明 杜国平 |
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| 作者单位： | 1. 南京理工大学自动化系,南京,210094;常熟理工学院物理系,常熟,215500
2. 南京理工大学自动化系,南京,210094 |
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| 摘 要： | 针对火力发电厂湿法除灰系统中柱塞泵的泄露问题,介绍了频域和时域相结合检测故障的方法.文中对比了声音样本的波形特点,利用加窗傅立叶变换分析了时域短时能量和频域短时自相关函数、功率谱函数,提取了声音样本的频率特征量,证明了利用特征频率点附近功率谱函数方差值检测故障的可行性,并提供了利用工程简化实现多路信号实时检测的方案.
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| 关 键 词： | 实时检测 方差 功率谱 故障特征 声音 |
| 文章编号： | 1001-0505(2003)增刊-0130-04 |
| 修稿时间： | 2003-05-15 |
A real time fault diagnosis system based on variance of power spectrum at characteristic frequency |
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| Xu Huigang , Bo Yuming Du Guoping. A real time fault diagnosis system based on variance of power spectrum at characteristic frequency[J]. Journal of Southeast University(Natural Science Edition), 2003, 33(Z1): 130-133 |
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| Authors: | Xu Huigang Bo Yuming Du Guoping |
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| Affiliation: | Xu Huigang 1,2 Bo Yuming 1 Du Guoping 1 |
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| Abstract: | This paper introduces a real time method to diagnose fault of axial piston pump system used in power plant to pump up wet ashes. Some characters of sound samples such as waveform, short time power, autocorrelation function and power spectrum function are analyzed. Then the characteristic frequencies are extracted and the variance of power spectrum at these characteristic frequencies are used to judge the fault. Finally, an engineering implementation based on time domain and frequency domain information of sound is provided. The algorithm in this fault diagnosis system is simple so that multi channel sound signal can be monitored simultaneously. |
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| Keywords: | real time fault diagnosis variance power spectrum fault information sound |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
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