摘要
提出时频分布信息熵的定义和求法 ,先对时频分布取绝对值 ,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 .
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.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第1期103-104,110,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重点研究发展规划项目资助 (G19880 2 0 32 0 )
