| 引用本文: | 王磊,陈昭男,张君,等.亚音速飞行目标气动噪声方位角估计技术.[J].国防科技大学学报,2021,43(6):163-169.[点击复制] |
| WANG Lei,CHEN Zhaonan,ZHANG Jun,et al.Azimuth angle estimation technology of subsonic flight vehicle[J].Journal of National University of Defense Technology,2021,43(6):163-169[点击复制] |
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| 亚音速飞行目标气动噪声方位角估计技术 |
| 王磊1,陈昭男1,张君2,3,周唯1,佟健飞3 |
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(1. 中国人民解放军 91550.部队, 辽宁 大连 116023;2. 西北工业大学 自动化学院, 陕西 西安 710129;3. 中国科学院声学研究所, 北京 100190)
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| 摘要: |
| 亚音速飞行弹道气动声源是宽带非平稳噪声。提出基于小波函数的波达方向估计算法,并采用时频分析方法进行特征分析,获取气动噪声显著目标特性。通过优化时间-空间谱特征,对在时频域空间谱的目标信号进行优化,从而增强目标信号在空间谱上的显著性,最终有效实现亚音速飞行弹道气动声源的角度估计。实验数据验证表明,基于时频分析阵列信号处理模型,可以更好地实现亚音速飞行目标气动噪声方位角估计。 |
| 关键词: 亚音速 气动噪声 方位角估计 |
| DOI：10.11887/j.cn.202106019 |
| 投稿日期：2020-07-14 |
| 基金项目:国家自然科学基金青年科学基金资助项目(6181481,4191415) |
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| Azimuth angle estimation technology of subsonic flight vehicle |
| WANG Lei1, CHEN Zhaonan1, ZHANG Jun2,3, ZHOU Wei1, TONG Jianfei3 |
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(1. The PLA Unit 91550, Dalian 116023, China;2. School of Automation, Northwestern Polytechnical University, Xi′an 710129, China;3. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
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| Abstract: |
| The aerodynamic noise of subsonic flight trajectory is wideband non-stationary noise. A new direction of arrival estimation algorithm based on wavelet function was proposed. The time-frequency analysis method was used to obtain the significant characteristics of the aerodynamic noise. By optimizing the characteristics of space-time spectrum, the target signal in time-frequency domain was optimized to enhance the significance of the target signal in space spectrum, effectively realizing the azimuth angle estimation of the aerodynamic noise of the subsonic flight vehicle finally. The experimental data shows that array signal processing model based on time-frequency analysis can better achieve the azimuth angle estimation of aerodynamic noise of subsonic flight vehicle. |
| Keywords: subsonic aerodynamic noise azimuth angle estimation |
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