基于Crazy Climber的时频分析方法与应用  

The Time-fruquency Analysis based on Crazy Climber Algorithm and its Application

作　　者：包文杰 毛成龙 胡越[1] 涂晓彤 李富才[1] BAO Wenjie;MAO Chenglong;HU Yue;TU Xiaotong;LI Fucai(State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, Chin)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《噪声与振动控制》2018年第A02期669-672,共4页Noise and Vibration Control

摘　　要：对于处理频率随时间变化的非平稳信号,传统的时域或者频域表示方法已经不能够满足需要。因此,时频分析成为分析时变非平稳信号的有效工具。基于Crazy Climber的时频分析方法对于一般时频分析方法的结果中出现的时频模糊现象具有明显的改进效果,有利于提高故障诊断过程中瞬时频率估计的准确性。尤其对于带有噪声的时频分布,可以在重新计算时频排列的过程中降低噪声的权值,使瞬时频率估计更加的准确。For analysis of non-stationary signals whose frequency contents vary with time,the classical representations of signals, the time-domain representation and the frequency-domain representation, are considered not feasible. Therefore,time-frequency analysis is an effective tool for the analysis of time-varying nonstationary signals. The time frequency analysis method based on Crazy Climber can improve the time frequency distribution obtained by general time-frequency analysis and improve the estimation of instantaneous frequency in the process of fault diagnosis. Especially for noisy timefrequency distribution, this method can reduce the weight of noise in the process of recalculation of time-frequency arrangement, and obtain more precise estimation of instantaneous frequency.

关 键 词：振动与波 非平稳信号 CRAZY Climber算法 时频分析 故障诊断 

分 类 号：O422.6[理学—声学]