舰载声呐与航空吊放声呐协同双基地搜索范围研究

针对舰载声呐与航空吊放声呐构成的异类传感器双基地工作问题,建立了基于声呐方程的海洋环境噪声背景下双基地搜索范围模型。在舰载声呐与航空吊放声呐双基地协同工作系统中,舰载声呐发射探测信号,舰载声呐和航空吊放声呐均接收水下目标回波信号。根据能量关系建立了扩展面积、扩展距离、等效半径模型,定量分析了声源级、基线长度等因素对系统搜索范围的影响。仿真结果表明,当舰载声呐声源级相对于吊放声呐声源级足够大时,协同双基地工作模式在较大的基线长度范围内不仅在搜索范围上优于舰载声呐和吊放声呐均独立工作时的单基地联合搜潜,而且在搜索宽度上也有优势。

Search area of cooperative bistatic system consisting of shipboard sonar and aerial dipping sonar

Aim at the operation problem of heterogeneous sensor bistatic system consisting of shipboard sonar and dipping sonar, a bistatic search model based on the sonar equation under ocean ambient noise is established. In the bistatic cooperative system, both shipboard sonar and dipping sonar receive underwater target echo signal, but the detection signal is transmitted by shipboard sonar. Based on energy relationship, the extended search area, range and equivalent radius of bistatic cooperative system consisting of shipboard sonar and aerial dipping sonar are modeled. Influences of factors such as source level and baseline length on the search area of the system are analyzed. Simulation results show that when source level of shipboard is high enough compared with dipping sonar, the bistatic cooperative system outperforms monostatic cooperative system not only in search area but also in search width.