浅海目标回声测试及目标响应求解研究

Shallow sea target echo tests and target response solving

使用液-固耦合振动模型对目标回声产生机理建模,推导耦合振动公式,得出单激励和多激励源下的目标回波表达式。从新的角度分析目标回波产生机制,并使用随机过程中的ARX模型构建目标模型。对于浅海环境中回波测试,使用多输入单输出ARX模型构建,最终分别求解出目标的直达入射波和在直达入射波作用下的直达回波,有效消除了多途信道的影响,获得了等效自由场中的测量结果。最后,通过水池实验验证了算法的有效性。

Using the liquid-solid coupled vibration model,the shallow sea target echo generation mechanism was modeled and the coupled vibration formulas were denived.The target echo expressions under conditions of single- and multi-excitation sources were deduced.The target echo generation mechanism was analyzed from a new view point by building the target model with ARX model in random processes.The multi-input single-output ARX model was used to build the target echo test model in shallow sea environment.At last,the target direct incident ware and direct echo wave were solved.The influence of a multi-channel path was eliminated effectively.The measurement results being equivalent to those measured in the free field were obtained.The effectiveness of the proposed algorithm was verified with pool experiments finally.