基于XML的机载航电系统仿真模型结构化描述

通过分析机载航电系统仿真模型存在的问题,给出了XML数据模型描述的方法和特点,提出了以想定任务需求为仿真建模的驱动数据的方法,基于XML技术设计了想定任务-飞机-机载装备三层描述关系。分别给出了想定任务和航电系统仿真模型的组成、结构化语言描述、有向树模型及XML技术描述的方法,并在此基础上形成规范的系统接口,为系统建模平台的建设提供重要的技术基础。最后,根据有向树和XML技术的特点,以节点和元素为基本单元,设计了XML文件数据访问的操作函数,形成系统建模平台的基础资源,利用设计的XML任务描述文件给出了航电系统仿真应用平台的设计架构。分析表明该方法用于航电系统仿真平台的建设将很大程度上提高仿真模型资源的重用性和共享性。     

工作流管理系统及其建模研究

对工作流技术发展情况进行概述．介绍由国际工作流管理联盟所定义的工作流管理系统的体系结构和参考模型,并简单介绍分析现今常用的几种工作流模型。在工作流建模方面,参考结合曾参与开发的工作流开发平台项目．详细地论述工作流模型建立阶段的一些技术要点和本系统建模工具的元模型元素架构及模型的两种存储方案。详细介绍工作流开发平台建模工具的功能和实现,并演示一个利用此建模工具所开发的模型实例。     

复杂机械系统仿真平台模型管理研究与实现

针对自主开发的复杂机械系统仿真平台InteDyn，基于多体系统动力学建模理论，采用面向对象思想对于．复杂机械系统模型管理技术作了详细探讨，提出了一套支持复杂机械系统仿真快速建模的模型管理机制，支持基于子系统的层次建模和模型重用．在InteDyn中的汽车仿真建模证明了该机制的有效性．     

支持实体数控铣削仿真验证的Cuboid-Array模型的研究

研究了Z-Buffer，Dexel和Ray-representation建模思想和方法，提出Cuboid-array的实体近似建模方法．采用基于设计模型的实体数控仿真验证技术，以Cuboid-array表示干涉元素集合体，提出基于B-rep和Cuboid-array的双体建模的近似实体数控仿真验证技术．给出了基于Cuboid-array的数控仿真验证算法，研制了基于双体建模和双体显示的数控仿真验证实验系统，实现了面向过程和结果的实体数控仿真的集成、面向实体数控仿真和实体数控验证的集成，并给出了实验用例．     

基于Repast Simphony平台的建模与仿真技术

随着计算机技术的发展, 基于Agent的建模与仿真技术被认为是研究复杂系统的有效方法, Repast Simphony平台为基于Agent的建模与仿真提供了有利条件. 针对如何利用Repast Simphony平台构建复杂系统仿真模型的问题, 重点介绍了Repast Simphony仿真平台, 分析了它的技术优势, 与同类仿真平台进行了比较分析, 并在分析平台主要类库的基础上, 总结出建模仿真的一般流程. 最后, 通过一个改进的Schelling模型仿真实例进一步阐述了利用平台构建复杂系统的设计与实现方法, 对使用Repast Simphony平台进行基于Agent的建模与仿真研究具有一定的指导意义.     

水中对抗仿真系统实体模型管理问题的研究

水中对抗作战仿真系统是模拟水中武器对抗作战的网上仿真演练系统。对于大规模的仿真演练,必然要求开发有效的、功能完善的模型管理系统。该文介绍了开发仿真实体模型管理系统过程中的方法：首先从系统仿真建模工作开始进行分析和研究,采用层次化、模块化建模并将仿真模型与仿真实验平台有效分离,规范了建模过程,分析了采用DLL技术在模型实现中的应用,并根据模型的特点,分析了采用模型库与模型管理系统对仿真模型进行管理的方法。     

基于隐式参数化的白车身建模方法

针对利用传统方法进行新车型概念设计时,需要在大量待选方案的基础上分别建立CAD模型和CAE模型,耗费大量人力和时间的问题,介绍车身隐式参数化建模的基本构成元素和高级构成元素、多层面建模技术和映射连接技术,以及基于隐式参数化的车身建模思路;对某车型前部白车身进行隐式参数化建模;对参数化模型与原有限元模型进行碰撞仿真分析和对比,结果表明用隐式参数化建模方法进行车型概念开发可行,能实现早期开发中车辆结构性能的快速评估.     

化工企业DEVS仿真本体建模研究

化工过程运营与操作优化需要建模与仿真支持,传统仿真建模方法,无论机理建模或数据驱动建模,往往依赖建模者的经验知识和特定的仿真平台,模型的通用性和可扩展性差。本文结合本体技术和DEVS仿真建模理论,提出了一种基于本体映射的DEVS仿真建模方法。首先借助protege软件将化工生产过程知识抽象成领域本体,并构建DEVS模型本体作为模型范式结构用于存储模型知识;然后设计了基于SPARQL的本体映射方法,从节点、端口、连接三个角度出发实现领域本体到DEVS模型本体的映射,实现了知识的迁移;最后运用本体翻译技术将模型本体翻译到具体平台如C＋＋和java。文章通过化工生产仿真案例验证了该方法的可行性。     

AMESim仿真技术在飞机液压系统中的应用

对法国Imagine公司推出的专门用于工程系统建模、仿真和动态性能分析的高级液压／机械系统建模、仿真平台AMESim的主要特点和功能进行分析．以飞机前起落架液压收放系统为例应用AMESim建模仿真技术，使用图形化建模方法建立系统元件的仿真模型，对飞机前起落架收放系统进行仿真结果分析，并提出采用AMESim的批处理方式优化系统参数的方法．     

平台级实体虚拟兵力仿真及应用研究

为构建虚拟兵力模型体系及其仿真系统,开展对抗式模拟训练与推演,对面向平台级实体虚拟兵力仿真及应用相关技术进行了研究。对计算机生成兵力系统与仿真平台、平台级实体虚拟兵力模型建模方法进行了梳理。对构建基于云仿真的虚兵服务系统相关技术路线、混合式仿真系统形态下兵力成体系仿真中的分布交互技术进行了总结,提出了基于混合体系结构的孪生战场环境仿真架构。最后对该领域存在的问题进行了归纳,为构建虚拟兵力模型体系以及虚拟兵力仿真系统提供方向和指引。     

General meta-model based co-simulations applied to mechanical systems

A fully functional meta-model co-simulation environment that supports integration of many different simulation tool specific models into a co-simulation is described in this paper.The continuously increasing performance of modern computer systems has a large influence on simulation technologies. It results in more and more detailed simulation models. Different simulation models typically focus on different parts (sub-systems) of the complete system, e.g., the gearbox of a car, the driveline, or even a single bearing inside the gearbox. To fully understand the complete system it is necessary to investigate several or all parts simultaneously. This is especially true for transient (dynamic) simulation models with several interconnected parts. One solution for a more complete and accurate system analysis is to couple different simulation models into one coherent simulation, also called a co-simulation. This also allows existing simulation models to be reused and preserves the investment in these models.Existing co-simulation applications are often capable of interconnecting two specific simulators where a unique interface between these tools is defined. However, a more general solution is needed to make co-simulation modelling applicable for a wider range of tools. Any such solution must also be numerically stable and easy to use in order to be functional for a larger group of people.The presented approach for mechanical system co-simulations is based upon a general framework for co-simulation and meta-modelling [9]. Several tool specific simulation models can be integrated and connected by means of a meta-model. A platform independent, centralised, meta-model simulator is presented that executes and monitors the co-simulation. All simulation tools that participate in the co-simulation implement a single, well defined, external interface that is based on a numerically stable method for force/moment interaction.     

微处理器仿真技术研究

仿真技术是微处理器设计的关键技术之一，通过集成电路仿真技术研究，提出了构建微处理器仿真平台的方法，在该平台上模拟了微处理的功能，实现了微处理器的设计验证。     

EPA产品开发仿真平台研究与开发

研究了EPA产品开发仿真平台的设计原理和各个模块实现的技术，说明了仿真平台软硬件的内部结构以及它们之间的连接，介绍了EPA开发仿真平台中核心的PTP技术、CSME技术、EPA设备管理技术、EPA服务技术等，以及仿真平台提供给外部开发使用的标准接口。并以1151差压变送器为例，说明了仿真平台的开发过程；从代码开发、代码维护、代码升级的角度说明了使用仿真平台进行开发的优点，以及使用该平台的最终开发成果。     

Virtual manipulator-based binocular stereo vision positioning system and errors modelling

There is a bottleneck of mobile robots positioning technologies for uncertain goals in complex field environment. Owing to the disturbance of the environment, the objects are hard to be located precisely by robot manipulator. Aiming at the positioning problem, binocular stereo vision system and positioning principle of the picking manipulator in virtual environment (VE) were proposed and expatiated upon; in addition, the manipulator positioning model was built in VE, and the manipulator positioning simulation system was developed by Microsoft Visual C++ 6.0; and the binocular stereo vision system platform with a three-coordinate guideway positioning was constructed for test; what’s more the error sources of vision positioning system was analyzed, and the camera system error was established; the mathematical model of experimental error and the camera calibration matching error were also found; with the developed robot manipulator positioning simulation software and vision system hardware, an experimental platform of positioning system was constructed, and using the platform, the stereo vision data was mapped to the manipulator and was guiding the accurate positioning in VE. Finally, experiment of positioning error compensation was carried out. Results of simulation in VE and the experiment showed that the vision positioning method was feasible for positioning in the field environment; it can be applied to control robot operation and to correct the positioning errors in real-time, especially to the long-range precision modelling and error compensation of robots.     

基于强化学习的两轮模型车控制仿真分析

在不同环境中,各种强化学习算法的控制效果存在差异,针对特定环境下算法难以选择的问题,基于Gym与Gazebo搭建了一种强化学习算法仿真的小车平台,使用其对Q-Learning算法、Sarsa算法和DQN算法在两轮模型车的行走控制训练中进行测试验证,利用三种复杂度不同的地图,在训练次数相同的情况下测试算法的有效性与鲁棒性。实验结果与预期符合：Q-Learning算法在较简单的地图中可以使模型车获得较高的奖励;Sarsa算法的稳定性更佳,训练收敛速度更快、效果更优;DQN算法收敛性与鲁棒性最优。该平台提供了一种利用仿真环境模拟实物运动控制的有效方案。     

珠三角典型示范区防洪排涝平台框架与功能设计

为解决珠江流域与区域城镇防洪排涝矛盾、暴雨遭遇频繁等突出问题,以珠三角典型示范区前山河流域中珠联围为研究区域,采用多源数据汇集、Web云服务、GIS和人工智能等新一代信息技术,深度剖析珠三角典型示范区洪涝问题和智慧水利需求,按照大尺度预警、小尺度精细模拟的思路,研究建立基于大数据和云计算的智慧防洪排涝平台,提供珠三角典...     

超立方体网络模拟实验平台的研究与开发

文章首先介绍了笔者研究与开发的模拟实验平台的设计目标和体系结构,然后探讨实现了平台扩充性和路由算法并行计算的关键技术。该模拟实验平台具有动态引入和创建实验对象、按用户需要加载相关的执行文件和资源文件、采用伪远程线程技术提高执行效率等特点。     

基于NS-2的网络半实物仿真平台实现

NS-2是一款广泛使用的网络仿真软件,但针对它的半实物仿真方法研究较少。针对这一问题,通过实际实时业务流与虚拟仿真网络的映射,提出并实现一种新的基于NS-2的网络半实物仿真HIL-NS平台。在详细描述HIL-NS平台构成基础上,讨论并解决了其实现的关键技术。在车载通信网络（VANET）实例下对802.11b无线MAC协议性能进行仿真,结果表明HIL-NS平台不但能与NS-2纯仿真的结果趋势保持高度一致性,并且在支持传统数据分析的同时,能有更直观的仿真性能实时输出。     

Spoken help for a car stereo: an exploratory study

This paper reports an investigation of the use of spoken (audible) help in an attempt to increase the usability and learnability of a high-end car stereo. To investigate the usefulness of audible spoken help for a car stereo, a simulation was constructed within which experimental help systems were incorporated. To validate the simulation, the 'real' car stereo (an existing consumer product, acting as the control condition) was compared empirically with its simulation. An experiment, using the four conditions of actual product, simulation of actual product, and two simulations employing different spoken help functions was undertaken. Forty participants in a between subjects design, carried out specified tasks with the car stereo version according to experimental condition. User performance, specifically task completion and number of button presses, and subjective reactions were measured. The simulated spoken help versions clearly assisted users with their tasks, and, in general, were responded to favourably when compared to performance with the control simulation and its product equivalent. This exploratory study provided further insight into users' concerns about car stereo usability and the overall results revealed the potential of spoken help facilities for novice users. We can conclude that the use of audible, spoken help, whether as a global option or as a specific 'button help', enhances the performance of, and is acceptable to, novice users of this consumer product type. Finally, this investigation also demonstrated that the use of a (Hypercard) simulation versus the 'real' counterpart (the simulated car stereo) to be generally valid and appropriate for this type of evaluation. In order to progress this direction, examination of the design of spoken help dialogues, user control of these, and issues concerning 'longitudinal' use of the product type are recommended.