【作者】 陈艳丽； 宫在晓； 郭良浩； 章伟裕；

【Author】 CHEN Yan-li;GONG Zai-xiao;GUO Liang-hao;ZHANG Wei-yu;State Key Laboratory of Acoustics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;

【机构】 中国科学院声学研究所声场声信息国家重点实验室； 中国科学院大学；

【摘要】 三点被动测距方法中的声速参数选取对测距精度有直接影响,高频应用中一般直接使用海水声速。但在低频条件下,浅海波导中传播的声信号有明显不同于海水声速的相速度和群速度。本文通过理论分析与数值仿真证明,三点被动测距距离解算公式中的速度项选取简正波相速度,可以有效提高浅海低频信号三点被动测距的测距精度。更多还原

【Abstract】 The speed parameter for the passive ranging of three-element array is important to the ranging accuracy,which is usually set as the sound speed of water at high frequency.But low-frequency sound in shallow water also has phase speed and group speed which are different from the sound speed of water.Theoretical analysis and simulation results show that the phase speed should be used for passive ranging of three-element array at low frequency in shallow water,and it could improve the ranging accuracy effectively.更多还原