【作者】 王新晓；

【导师】 黄建国；

【作者基本信息】 西北工业大学 ， 信号与信息处理， 2002， 硕士

【摘要】 自导系统的仿真研究是目前海军装备建设和发展中的一项重要任务，是综合研究自导系统性能、理论和方法，提高自导系统技术战术指标的有效手段之一。自导系统仿真建模及仿真系统研究包括建立自导系统的数学模型和仿真模型，研制开发自导仿真系统，并进行自导系统仿真实验等。本文在课题组前期研究工作的基础上，又取得了一些新的研究进展和有价值的研究成果。主要有： 1．对自导系统信号与信息处理的理论和方法进行了全面系统的研究，建立了相应的数学模型 首先，对自导系统的总体性能及工作过程进行了深入的研究和分析，明确了系统的信息交互关系及模块划分。其次，深入研究了信号与噪声模型、时域和频域信号处理、空域信号处理(波束形成)、目标信号检测与参数估计等原理和方法，建立了自导系统各个功能模块的数学模型，这对研究自导系统具有重要的指导意义，同时也为建立自导仿真系统提供了理论基础。 2．建立了自导系统的各个功能模块的仿真模型 自导系统的数学模型只有变成为仿真模型后，才能在计算机上进行仿真实现。论文重点研究了自导系统各个功能模块的仿真建模问题，以A244鱼雷的自导系统为例建立了发射信号、目标回波、目标辐射噪声、背景噪声、海洋混响、阵元接收信号、前置滤波器、波束输出、积分输出、目标检测、信号参数估计等子模块的仿真模型。 3．对自导仿真系统的整体结构及性能进行了深入的研究和分析 深入研究并建立了自导仿真系统的系统结构、模块组成以及各个功能模块之间的信息交互关系。以A244鱼雷为例研究分析了自导仿真系统的性能及实时性问题，并提出了提高自导系统实时性的降采样和BittWare Hammerhead PCI加速卡解决方案。 4．根据系统的仿真模型使用VC++编制了自导系统仿真软件 本文利用Micosoft Visual C++、matlab、matcom和olechart等编程语言和工具，依据模块化的编程思想，在计算机上对自导系统的各个功能模块进行了仿真实现，这些模块的适当组合可以构成不同类型的自导仿真系统。该套软件具有标准的Windows应用程序界面、良好的集成环境和先进的信号波形观察手段，是对自导系统进行研究、开发及系统性能评估的有效工具。 5．利用编制的自导系统仿真软件进行了系统仿真实验 利用本文所编制的自导系统仿真软件在计算机上进行了仿真实验，给出了主要功能模块的仿真结果，通过对仿真结果的研究分析从而验证了本文所采用和建立的数学模自导系统仿真建模及仿真系统研究摘要型、仿真模型及研制的自导仿真系统的正确性和有效性。更多还原

【Abstract】 With the development of the computer technology, the application of simulation in the scientific research can not only save a large amount of outlay, but also shorten the research period. The research of homing simulation system is an important area. It is an efficient tool of investigating the performance, theory and method of homing system. It is also a good way to improve the tactics index of homing system technique. The study of simulation modeling and simulation system of homing system, which includes building the mathematical model and simulation model of the system, developing simulation software and conducting system simulation experiments. Based on the previous research of our research group, some new development is achieved and more valuable research conclusions are drawn. The main research advances can be summarized as follows.1. Investigate the performance and method of homing system signal processing comprehensively, and found the corresponding mathematical modelsFirst, the holistic performance and operation process are thoroughly investigated. The function blocks are partitioned and the information flow connection is established. Especially, mathematical models of signal and noise, the principles and methods of signal processing in the time domain, frequency domain and the space domain (beam-former), the target detection and signal parameter estimation are emphasized. Then, the mathematical models of all the function blocks are founded.2. Found the simulation model of all the function blocksThe homing system can be simulated by the computer only if the mathematical models are turned into simulation models. The simulation modeling of every function block is studied in the paper. Taking A244 torpedo as an example, the simulation models such as transmitting signal, target echo signal, target radiating noise, background noise, ocean reverberation, array signal, conditioner filter, beam-form output, time processor output and signal parameters estimation of A244 torpedo are established.3. Study and analysis of homing simulation systemFirst, the system structure, blocks composing and the information exchange relationship of every function blocks are studied and founded. Then, the real-time performance of homing simulation system is analyzed by taking the example of A244 Torpedo. And the means of settlement such as depressed sampling and BittWare Hammerhead PCI accelerate board are presented, too.4. Programm the simulation software of homing system by using VC++ and Matcom according to the simulation modelsWith the programming of modularizing hierarchy design, a piece of software of complete homing system is built. All the function blocks of homing system are realized by simulation method, which can make up of all kinds of homing system. The software is developed by using Microsoft Visual C++, Matlab, Matcom and Olechart with the standard interface of Windows style. So it is an effective tool of developing new methods for homing system and evaluating the performance.5. Simulation experimentsThe simulation results of main function blocks are presented. And the study and analysis of the simulation results show that the mathematical models, simulation models and simulation software system adopted and founded in the paper are more accurate and efficient.更多还原