【作者】 何骏；

【导师】 杜斌；

【作者基本信息】 上海交通大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 系统仿真是以计算机及相应的仿真软件为工具进行实验研究的理论和方法论体系。它体现了实验思考的方法,用以探索复杂系统深层次的运动机理和规律性,具有科学的先验性。在现代社会,系统仿真,特别是离散事件系统仿真,已成为各种科研领域的研究热点,也是国家和国防关键技术发展计划之一。现实世界中的大量系统都可用离散事件系统描述,比如各种排队系统和库存系统,生产制造系统,计算机网络系统等,而且近年来,人们的注意力更多的投向了社会、经济、生态等复杂系统的分析研究上,在这些系统的规划、设计、运行、分析和改造的各个阶段,离散事件仿真技术无疑将发挥越来越重要的作用。随着各种面向应用和用户的系统仿真软件的不断发展,目前世界上已经出现了大量的离散事件仿真软件,但大都是国外的商业软件,国内相比国外还有不小的差距,鉴于离散事件仿真在科研和企业研发中日益突出的作用和应用价值,本课题的目的就是设计开发出具有自主知识产权,通用性好,建模效率高的离散事件仿真软件包,这对于提高我国的计算机仿真应用水平,减小相关研发开销,以及增强国家科技实力和企业核心竞争力方面都有着重大的意义。本文在对一般离散事件系统仿真的共性进行大量和广泛的抽象分析的基础上,结合面向对象的思想和方法,设计开发了一个通用的离散事件仿真平台类库。该仿真平台类库封装了离散事件仿真的各项基本特征,并从用户的角度预定义了一些最常使用的功能模块,具备使用简单有效,通用性和扩展性强,易于集成和进行二次开发等特性,能应用于各种不同规模和复杂度的离散事件仿真需求。相比国内外已有的类似仿真软件包,本仿真平台类库还具有清晰直观的设计架构,简单易懂的宏观仿真建模思想,方便有效的使用方法,灵活强大的数据采集和统计分析机制,丰富的仿真实验方案设计和实验控制支持以及高效率的程序执行过程。利用本离散事件仿真平台,仿真开发人员只需具备基本的C++语言水平,就可以将主要精力集中于仿真系统的分析和逻辑描述方面,不用花费大量时间编写底层细节代码,从而较大程度上减少仿真程序的编写和测试维护工作,显著提高工作效率。本文还通过几个具有代表性的离散事件仿真实例以及一个大型海港物流系统仿真模型的构建过程详细介绍了本离散事件仿真平台的用法,阐述了仿真平台的各项优点和特性,同时也突出了其应用价值和应用前景。更多还原

【Abstract】 System simulation is a theoretical and methodological system, which takes computer and corresponding simulation software as tools for conducting experimental study. Being able to explore the deep level movement mechanism and regularity of complex systems, system simulation embodies experimental thinking approach and has scientific apriority. In modern society, system simulation, especially discrete event system simulation, has become a hotspot in many scientific research fields, as well as one of national and national defense key development plans. A large number of systems can be described as discrete event system in real world, such as classic queue systems and inventory systems, manufacturing systems, computer network systems and etc. And in recent years, more simulation and research attention has been focused on society, economy and ecosystem, which are more complex systems. During the planning, designing, running and transformation stages of these systems, discrete event simulation technology will definitely play a more and more important role.Along with the ongoing development of simulation software which is oriented to application and users, there has appeared lots of discrete event simulation software in the world. But most of these softwares are commercial and designed by foreign people, and in these aspects there is certain gap compared with overseas countries. In view of the fact that discrete event simulation technology has become increasingly significant in scientific research and enterprise’s R&D, if we can design a general purpose discrete event simulation software which is general, efficient for modeling, easy to use and above all has our independent intellectual property, from this point of view, it will have very great significance in improving computer simulation application level of our country, decreasing scientific and enterprise application research cost, enhancing national scientific & technical strength and enterprise core competence. And this is the main motive of my topic choice and the importance of this paper.Based on the massive and extensive abstract analysis of the commonness of general discrete event simulation application and combined with object oriented methods, a general purpose discrete event simulation platform class library was designed and presented. This simulation platform class library encapsulates many basic features of discrete event simulation and pre-defines lots of typical function modules. It is fast, easy to use and has good generality and expansibility. It is also easy for integrating and secondary development, so it can be applied to many application fields which have different scale and complexity. Compared with the existing similar simulation software packages, this simulation platform class library has the following advantages: clear and direct viewing design structure, simple and pellucid high level modeling ideas and methods, easy and effective using method, flexible data sampling and statistic analytical mechanism, strong simulation experiment design and control ability, and fast and efficient program execution. Using this discrete event simulation platform, simulation developers, who only know a little about C++ programming, will be able to concentrate on the system analysis and logical description. They don’t have to spend much time writing common and low level code, which will to a great extent reduce much programming, testing and maintaining work and will obviously improve working efficiency.Through several typical discrete event simulation application examples which differ in behavior and complexity and a large scale harbor logistics system simulation model, this article give a detailed and comprehensive description of the usage of this simulation platform and many merits and characteristics of it, in the mean time its application value and application prospect is also highlighted.更多还原