| 基于局部特征尺度分解及分形维数的模拟电路故障诊断方法 |
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| 引用本文： | 盛沛,许爱强,徐学文,李恒.基于局部特征尺度分解及分形维数的模拟电路故障诊断方法[J].海军航空工程学院学报,2020,35(1):101-105. |
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| 作者姓名： | 盛沛 许爱强 徐学文 李恒 |
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| 作者单位： | 海军航空大学,山东烟台264001,海军航空大学,山东烟台264001,海军航空大学,山东烟台264001,海军航空大学,山东烟台264001 |
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| 摘 要： | 针对目前自适应时频分析方法在模拟电路故障诊断方向理论研究尚不完善、缺乏实践验证等方面的问题,采用改进LCD算法及分维理论相结合的方法进行理论研究及实物验证。对被测点所采集数据进行预处理后直接进行LCD分解并计算各分量分维数作为故障特征,输入神经网络进行故障诊断。仿真结果验证了该方法的有效性;实物验证成功分类了2类电路状态,并阐明了分类结果杂散点较多的原因。
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| 关 键 词： | 局部特征尺度分解 分形 模拟电路 |
Fault Diagnosis Method of Analog Circuit Based on LCD and Fractal Dimension |
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| SHENG Pei,XU Aiqiang,XU Xuewen,LI Heng.Fault Diagnosis Method of Analog Circuit Based on LCD and Fractal Dimension[J].Journal of Naval Aeronautical Engineering Institute,2020,35(1):101-105. |
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| Authors: | SHENG Pei XU Aiqiang XU Xuewen LI Heng |
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| Institution: | Naval Aviation University, Yantai Shandong 264001, China,Naval Aviation University, Yantai Shandong 264001, China,Naval Aviation University, Yantai Shandong 264001, China and Naval Aviation University, Yantai Shandong 264001, China |
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| Abstract: | Aiming at the problem that the current adaptive time-frequency analysis method is not perfect in the field of ana?log circuit fault diagnosis and lack of practical verification, the improved algorithm and fractal dimension theory are com?bined to carry out theoretical research and physical verification. The fractal dimension of each LCD component was usedas the fault feature characteristics input to the neural network for fault diagnosis. Simulation results show that the methodwas effective. Two types of circuit states were successfully classified by experiments. The reason why there were many mis?cellaneous points was explained. |
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| Keywords: | local characteristic-scale decomposition fractal theory analog circuit |
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