Study of Stochastic Resonance Recovery Based on Cosine Fitting

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Study of Stochastic Resonance Recovery Based on Cosine Fitting

更新时间：2025-07-09

- Study of Stochastic Resonance Recovery Based on Cosine Fitting
- Vol. 44, Issue 1, Pages: 41-45(2010)
- 作者机构：
  
  西安交通大学机械制造系统工程国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH17
- Online First：10 January 2010，
  
  Published：2010
- 稿件说明：
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Study of Stochastic Resonance Recovery Based on Cosine Fitting[J]. 2010, 44(1): 41-45.
DOI：

Study of Stochastic Resonance Recovery Based on Cosine Fitting[J]. 2010, 44(1): 41-45. DOI：

摘要

针对当前随机共振反演方法实施过程流程复杂、需要调节的参数繁多、对幅值的估计不准

以及难以处理频率相差较大的多频信号等诸多问题

提出了一种新的采用余弦拟合的随机共振反演算法.该算法采用移频变尺度随机共振检测频率

利用所得频率设计余弦曲线对输入信号进行最小二乘拟合

不需对特殊点进行特别处理

幅值不受波形畸变的影响

因此可以处理频率相差任意大小的多频信号.通过数值仿真和机车走行部故障的诊断

验证了该算法具有较强的工程实用性

同时结合频谱校正技术可以进一步提高该方法的精确性

更准确地检测出信号频率及幅值.

Abstract

The conventional stochastic resonance recovery techniques are facing some troubles

such as the complex process

too many parameters

wrong estimated amplitudes

and especially the difficulty for processing the multifrequency signals with frequencies staying far away from one another. A new strategy is proposed

where frequency-shifted and re-scaling stochastic resonance are adopted to detect frequencies

the input signals are least square fitted with cosines designed based on the acquired frequencies

and no special postprocessing is required for the distorted points

the waveform distortion has no influence on the amplitude quantization. Almost all the multifrequency signals can be processed. The effectiveness is validated by a simulation and a fault quantitative diagnostic case of electric locomotive running parts. The amplitude of periodic signals can be reduced by non-periodic sampling

the accuracy is thus developed by involving the spectrum correction technology

and more accurate signal frequencies and amplitudes can be detected.

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Keywords

references

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