| 郭丽华,孙世博.基于多普勒因子补偿的高速平台声学测速方法[J].声学技术,2024,43(4):481~487 |
| 基于多普勒因子补偿的高速平台声学测速方法 |
| Acoustic velocimetry method for high speed platforms based on Doppler factor compensation |
| 投稿时间：2024-06-23 修订日期：2024-07-09 |
| DOI：10.16300/j.cnki.1000-3630.2024.04.005 |
| 中文关键词: 声学多普勒测速 高速平台 宽带二进制相移键控(BPSK) 复相关测速 |
| 英文关键词: acoustic Doppler velocimetry high speed platform broadband binary phase shift keying(BPSK) complex correlation velocimetry |
| 基金项目:黑龙江省地下工程技术重点实验室开放基金(2017-HXYKF=05);哈尔滨学院青年博士基金项目(HUDF2017204)。 |
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| 中文摘要: |
| 水下运动平台自速度估计通过声学多普勒测速技术实现，其中估计的核心在于复相关过程。高速工况下，多普勒效应的增强导致回波最优相关性偏移先验相关峰位置，产生测速误差。文章针对上述问题，提出一种基于相关域多普勒因子补偿的高速平台宽带二进制相移键控(Binary Phase Shift Keying, BPSK)测速方法。该方法通过对多普勒因子进行“估计-补偿”迭代过程，修正常规复相关测速结果。仿真结果表明，修正后的速度估计准确度提高了5‰以上，有效优化高速运动平台的自速度估计性能。 |
| 英文摘要: |
| The self-velocity estimation of underwater motion platform is achieved by using acoustic Doppler velocimetry techniques, where the core of the estimation is the complex correlation process. Under the high-speed condition, the enhanced Doppler effect causes echo optimal correlation shifting from the prior correlation peak position, resulting in velocity measurement errors. In response to the above issues, a broadband binary phase shift keying (BPSK) speed measurement method for high speed platform is proposed based on Doppler factor compensation in correlation domain. The method proposed in this paper corrects the conventional complex correlation velocity measurement results by iteratively estimating and compensating for the Doppler factor. The simulation results show that the corrected speed estimation accuracy is improved by more than 5‰ on average, effectively optimizing the selfspeed estimation performance of the high-speed motion platform. |
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