【作者】 李艳梅；

【导师】 惠俊英；

【作者基本信息】 哈尔滨工程大学 ， 水声工程， 2003， 硕士

【摘要】 声呐脉冲侦察是利用目标主动声呐发射的脉冲信号来探测目标的技术。其主要任务是侦察目标主动声呐的工作参数，对目标实施跟踪。其关键技术是测量目标距离，而距离测量的关键是高精度的时延测量。时延测量精度是制约距离测量精度的主要因素。 本论文的研究工作分为两个部分：三元非对称阵被动测距技术研究和声呐脉冲侦察模块系统软件的研制。 对三元非对称阵被动测距技术的主要研究工作包括：分析了三元对称阵和非对称阵测向测距的原理，对两种阵型的测向、测距误差进行了对比分析，探讨了三元阵被动测距中时延差的特点，提出了有效的时延差估计方法，并对该方法的局限性以及被动测距中存在的距离模糊问题进行了探讨研究。 本论文在改进的声呐脉冲侦察模块硬件系统的基础上，开发了一套实时系统软件。该软件的主要功能包括：对主动声呐CW脉冲信号进行检测，测量目标信号的中心频率，测定目标的方位；执行显控台跟踪命令，对搜索到的目标进行跟踪，测量目标信号的重复周期，测定目标的距离，给出距离测量值的置信度。 本论文在Matlab环境下对测频、测向、测距等算法进行了仿真，给出了各个环节的仿真结果。所研制的声呐脉冲侦察模块用目标模拟器(ATANC)进行了陆上联调实验，实验结果验证了实时处理声呐脉冲侦察模块性能优良。更多还原

【Abstract】 Detecting sonar pulse transmitted by an active sonar, it is called "sonar pulse detection" . The main task of it is to measure the working parameter of active sonar and track the target. The key technology of it is passive ranging, while the key of ranging is the high precise time delay estimation, which is the main factor that restricts the precision of ranging.The research work of the dissertation includes the following two parts: researching the passive ranging technology of three elements dissymmetrical array and developing system software of the sonar pulse detection module.The main work of the first part includes: analyzing the theory of measuring direction and distance of the target by three elements symmetrical and dissymmetrical array, comparing the measuring error of two kinds of array, discussing the characteristics of time delay in passive distance measurement, giving valid method of time delay estimation, and discussing the restriction of this method and the distance wrapping in passive ranging.In the thesis, a series of real-time system software of sonar pulse detection is developed on an improved hardware system. The main function of the module is as follows: it can detect the CW signal transmitted by the active sonar, and measure the frequency of target signal and the direction of target. It can execute the tracking order sent by the display and control platform, and track the searched target, measure the target signal repetition intervals and target distance, and give the reliability of estimated distance.The arithmetic of measuring frequency, direction and distance issimulated in Matlab, and the simulating results are given. An experiment on the module is carried out with the target simulator ATANC, and the experiment results shows the performance of sonar pulse detection module is good enough.更多还原