基于线阵连续扫描的水下航行器辐射声场全息重构  

Holography reconstruction of AUV radiated acoustic field by continuous scanning of hydrophone array

作　　者：万海波[1] 朱石坚[2] 何其伟[2] 丁少春[2] 

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]海军工程大学科研部,武汉430033

出　　处：《海军工程大学学报》2015年第4期65-69,共5页Journal of Naval University of Engineering

基　　金：全国高校优秀博士学位论文作者专项资金资助项目(201057)

摘　　要：针对在线阵步进扫描定位中存在的准确度以及测试效率不高的问题,提出了采用线阵进行连续扫描的方法,并根据声源和线阵的运动关系和莫尔斯声学理论,分析了多普勒效应对全息重构结果的影响,同时采用幅值校正和三次样条插值拟合抽样的方法实现了时域信号校正,从而通过自谱和互谱计算构成了全息复声压面。最后,通过仿真和试验验证了线阵连续扫描的水下航行器辐射声场全息重构的可行性和准确性。To ensure the accuracy and efficiency in the near-field acoustic holography test of the AUV radiated acoustic field by the hydrophone array step scanning, this paper proposes a method of conti- nuous scanning by using the hydrophone array, analyzes the influence of Doppler effect on the results as holography reconstruction according to the motional relationship between the acoustic sources and the hydrophone array as well as the Moore acoustic theory, and modifies the time-domain signal of each hydrophone through amplitude correction and cubic spline interpolation fitting sampling. As a re- sult, the complex sound pressure surface for holography reconstruction can be obtained from the self- spectrum and cross-spectral calculation. Finally, the feasibility and accuracy of this method is verified by the simulations and experiments.

关 键 词：水下航行器 连续扫描 多普勒效应 辐射声场 全息重构 

分 类 号：O322[理学—一般力学与力学基础]