| 旋转机械启动全过程DHMM故障诊断方法研究 |
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| 引用本文： | 丁启全,冯长建,李志农,吴昭同. 旋转机械启动全过程DHMM故障诊断方法研究[J]. 振动工程学报, 2003, 16(1): 41-45 |
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| 作者姓名： | 丁启全 冯长建 李志农 吴昭同 |
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| 作者单位： | 1. 浙江大学机械与能源学院,杭州,310027
2. 大连民族学院机电系,大连,116600 |
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| 基金项目： | 国家自然科学基金项目 (编号 :5 0 0 75 0 79) |
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| 摘 要： | 旋转机械启动过程中的振动信号包含有重要的参考信息，研究该过程中的旋转机械运转状况，有助于发现存在于系统中的早期故障。根据离散隐Markov模型（DHMM）的建模理论，对旋转机械启动过程的振动谱矢量序列进行标量量化处理，并建立了各种模拟故障的DHMM进行故障分类尝试，实验证明，该方法是十分有效的。
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| 关 键 词： | 旋转机械 故障诊断 振动信号 DHMM 标量量化 |
| 修稿时间： | 2002-03-22 |
Study on DHMM Fault Diagnostic Methods for Rotating Machinery during Run-up |
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| Ding Qiquan Feng Changjian Li Zhinong Wu Zhaotong. Study on DHMM Fault Diagnostic Methods for Rotating Machinery during Run-up[J]. Journal of Vibration Engineering, 2003, 16(1): 41-45 |
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| Authors: | Ding Qiquan Feng Changjian Li Zhinong Wu Zhaotong |
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| Affiliation: | Ding Qiquan 1 Feng Changjian 2 Li Zhinong 1 Wu Zhaotong 1 |
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| Abstract: | Vibration signals of a rotating machine in run up stage contain reference information of equipment. Therefore the information of the running status in this stage is helpful to detect early latent faults in the system. Based on the Discrete Hidden Markov Model (DHMM) theory, a series of FFT spectrum vectors of rotor vibration signals in the run up stage are quantized scalar and DHMMs are constructed to classify the modeling faults. Experiment results show that the method is very effective. |
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| Keywords: | rotating machinery faults diagnosis vibration signal DHMM scalar quantization |
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