| 徐俊,傅耘,张建军,孙建勇,王星皓.基于最大谱的非平稳随机振动数据分析处理方法研究[J].装备环境工程,2016,13(5):54-60. 徐俊,傅耘,张建军,孙建勇,王星皓.The Research of Processing Method Based on Maximum Spectral for Non-Stationary Random Vibration Data[J].Equipment Environmental Engineering,2016,13(5):54-60. |
| 基于最大谱的非平稳随机振动数据分析处理方法研究 |
| The Research of Processing Method Based on Maximum Spectral for Non-Stationary Random Vibration Data |
| 投稿时间：2016-08-16 修订日期：2016-09-07 |
| DOI：10.7643/ issn.1672-9242.2016.05.009 |
| 中文关键词: 非平稳随机信号，最大谱， FFT，数字滤波 |
| 英文关键词:non-stationary random vibration data, maximum spectral, FFT, digital filter |
| 基金项目: |
|
|
|
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 解决非平稳随机振动环境实测数据无法采用功率谱密度分析方法的问题。方法 基于最小均方误差准则，归纳总结了FFT和数字滤波两种最大谱分析方法。结果 通过对比两种方法在不同分辨率带宽时计算的优缺点并分析其误差，理论分析和仿真结果均表明基于比例分辨率带宽的FFT最大谱分析方法的误差最小。结论 将FFT最大谱分析方法应用于某型炸弹9个架次自由飞振动数据的处理和环境条件确定中，结果合理有效，为基于最大谱制定型号振动环境试验条件提供指导。 |
| 英文摘要: |
| Objective To solve the problem that the environmental measurement of non-stationary random vibration data can’t deal with power spectral density. Methods Two methods of maximum spectral analysis have been summed up, it’s FFT and digital filter, which are based on minimum mean-square error criterion. Results The advantages, disadvantages and error of two methods with different bandwidth are discussed, and the theoretic analysis and simulation results show that: the error is minimum with conventional FFT computations (proportional resolution bandwidth). Conclusion Applying the conventional FFT computations into 9 sorties of non-stationary vibration data processing and environmental condition determination for a certain missile, the result is reasonable and effective, which provides guidance for formulating environmental condition based on maximum spectral. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
