| Choi-Williams分布参数优化及其应用 |
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| 引用本文： | 熊良才,史铁林,杨叔子. Choi-Williams分布参数优化及其应用[J]. 华中科技大学学报(自然科学版), 2003, 31(1): 103-104,110 |
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| 作者姓名： | 熊良才 史铁林 杨叔子 |
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| 作者单位： | 华中科技大学机械科学与工程学院 |
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| 基金项目： | 国家重点研究发展规划项目资助 (G19880 2 0 32 0 ) |
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| 摘 要： | 提出时频分布信息熵的定义和求法，先对时频分布绝对值，进而计算该分布的信息熵，根据信息熵最小的原则对Choi-Williams分布的参数进行优化，然后用优化的参数计算信号的Choi-Williams分布，得到的Choi-Williams分布能较好地反映信号的时频结构，将该方法应用到齿轮故障的诊断取得了良好的效果。
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| 关 键 词： | Choi－Williams分布 参数优化 故障诊断 信息熵 齿轮 时频分布 概率分布 |
| 文章编号： | 1671-4512(2003)01-0103-02 |
Parameter optimizing of Choi-Williams distribution and its application |
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| Xiong Liangcai Shi Tielin Yang Shuzi. Parameter optimizing of Choi-Williams distribution and its application[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2003, 31(1): 103-104,110 |
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| Authors: | Xiong Liangcai Shi Tielin Yang Shuzi |
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| Abstract: | The information entropy of time frequency distribution was defined and its calculation was put forward in the paper. The time frequency distribution of a signal was computed, their absolute values were given and the information entropy of them was estimated. The parameters optimization of Choi Williams distribution based on the minimum information entropy principle was adopted. The parameter enabling the information entropy of the Choi Williams distribution to be minimum was selected as the optimized parameter. The parameter optimizing of Choi Williams distribution reveals the time frequency structure of the signal more distinctly and it is successfully applied to faults diagnosis for gear. |
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| Keywords: | fault diagnosis information entropy Choi Williams distribution gear |
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