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《现代电子技术》2016,(16):64-67
嵌入式通信网络的运行环境复杂,降低了信息采集效率和通信网络协同控制任务性能。为了增强系统在复杂对抗环境下的协同性能,应提高系统的抗毁性。因此,采用LPC2290芯片作为微控制器,融合以太网模块、CAN模块、电源模块和相关外围接口模块,构建整个嵌入式通信网络系统。系统硬件电路结合子板和母板共同实现相关功能,提高系统的协同处理性能;采用基于Protocol_TCP协议的流套接子完成数据通信,增强通信系统的稳定性。依据嵌入式通信网络抗毁指标以及成本的最小化目标,设计网络抗毁性模型。将该抗毁性模型融入嵌入式通信网络自愈模型中,增强遭受攻击后网络的自愈能力,提高网络抗毁性能。实验结果表明,该设计系统具有较高的抗毁性,系统的吞吐量和平均时延性能较高。 相似文献
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介绍了一种基于AT89C2051单片机的温度实时采集与显示系统,介绍该系统的工作原理和设计方法,利用美国DALLAS公司生产的DS18B20温度传感器进行温度检测,并通过串口通信将采集的温度传送至PC机。在软件方面采用汇编语言和VB控制单片机,并设计了上位机的实时监测界面,系统会根据温度值自动绘制实时曲线。该系统硬件简单,性能可靠、价格低廉、具有较好的实用性。 相似文献
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协同传输作为一种可靠通信技术,通过利用空间分集,能够克服无线通信收发双方经历的信道衰落、噪声干扰、路径损耗等,有效提升系统传输性能。目前有关协同通信技术的基础理论研究较多,但大多数理论研究并没有应用到实际的原理样机中,因此缺少实测数据作为支撑。本文首先设计实现了一种自适应分布式协同传输协议,该协议通过信道感知技术实时获取信道质量信息,自适应地选择协同节点和协同传输方式。通过将所设计的传输协议实现在自主研发的原理样机上,本文从误码率、丢包率和吞吐量三个性能指标上,分别测试了系统在室内、室外、地面、空中等应用场景下的实际传输性能。测试结果表明,相比于传统点对点直传方式,本文所提的自适应分布式协同传输技术能够显著提升节点间的可靠传输性能,实现分布式多节点的自主协同组网通信。 相似文献
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针对卫星通信系统在恶劣电磁环境下单一技术体制抗干扰效果不佳的情况,发展了多域协同抗干扰技术。该技术基于凸集投影理论,把时、频、空域等多种抗干扰技术进行有机融合,从不同的角度和层面进行多域协同处理,使得干扰能够最大化地消除。该技术通过域间或域内的切换技术作为基本实现,可促进发展卫星通信系统中的多模式、多频段和多平台协作通信,实现通信信号的多参数实时变化,加强抗干扰、反侦察和抗截获的一体化设计。 相似文献
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文中针对紧急事件应急响应的需求,设计了一种基于无线传感器网络,使用了面向服务架构(SOA)的应急响应系统。该系统使用了生命体征监测传感器、MoteTrack追踪定位系统等先进的无线传感器技术,实现了紧急事件应急响应工作中的实时监控和实时通信,并通过WebService实现多个应急响应相关系统之间的实时数据交换和互操作。经过测试证明,该系统完全满足设计需求。 相似文献
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基于计算机网络技术设计了一个辅助设计系统,其核心是Web工程数据库的设计与调用。说明了系统的总体构架,详细论述了数据库的设计步骤及模块组成,以及对数据库的异地调用方法与程序。本系统能初步实现网络下的CAD协同设计。 相似文献
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《Mechatronics》2015
Collaboration has been found in previous studies on the design of assembly lines to be a useful mechanism. In this study, the focus is on a collaborative assembly (CA) framework, inspired by the design principles of CCT, the Collaborative Control Theory, to improve balanceability and flexibility of assembly lines through tool sharing (TS) among idle and bottleneck workstations. TS is widely practiced in advanced assembly facilities to reduce cost and improve consistency and standardization in assembly and in assembly-and-test utilities, relying often on real time control. The framework developed here addresses the systems design aspect of Mechatronics, covering the planning, execution, and control mechanisms. Planning includes assembly line balancing (ALB) and initial TS decisions, made continually by solving a bi-objective mixed-integer program (BOMIP). A collaborative multi-agent system (CMAS) enhanced with a TS-best matching (BM) protocol is developed to execute the plan, control the process, and modify the TS decisions, considering dynamic changes in the system’s operations. Experiments show that the new CA framework significantly outperforms classic approaches (i.e., ALB without TS-BM) in terms of cycle time, utilization of tools, and balanceability. In addition, the control mechanism is proven to augment the line’s flexibility against the inherent uncertainties of assembly processes, compared to the previously developed static CA frameworks. 相似文献
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为了处理协同设计中多个分布、异构的组织和个人的复杂数据交互,利用沉浸式可视化技术提供高质量的无间距协作。通过对访问网格进行分析,提出基于访问网格的沉浸式可视化协同设计系统框架,研究系统实现及通过网格服务进行任务智能分解的关键技术。系统实现表明,比传统基于Internet的协同设计系统具有更高的设计效率和更好的设计效果。 相似文献
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Sumiyoshi H. Mochizuki Y. Suzuki S. Ito Y. Orihara Y. Yagi N. Nakamura M. Shimoda S. 《Broadcasting, IEEE Transactions on》1996,42(3):229-236
A new DTPP (Desk-Top Program Production) system has been developed that enables multiple program producers (directors) working at different locations to collaborate over a computer network and prepare a single program for broadcasting. In this system, information is shared among users by exchanging data edited on nonlinear editing terminals in program post-production work over a network in real time. In short, the new DTPP system provides a collaborative work space for producing TV programs. The system does not make use of a special server for collaborative work but rather multiple interconnected editing terminals having the same functions. In this configuration, data at a terminal which has just been edited by some operation is forwarded to all other connected terminals for updating. This form of information sharing, however, requires that some sort of data synchronizing method be established since multiple terminals are operating on the same data simultaneously. We therefore adopt a method whereby the system synchronizes the clocks on each terminal at the time of connection and sends an operation time stamp together with the edited data. This enables the most recently modified data to be identified and all information on all terminals to be updated appropriately. This paper provides an overview of this new collaborative DTPP system and describes the techniques for exchanging edited data and synchronizing data 相似文献
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Bouillon Y. Wendling F. Bartolomei F. 《IEEE transactions on information technology in biomedicine》1999,3(1):28-31
A collaborative extension to a platform dedicated to signal visualization and processing is presented. The platform now allows geographically distant users to work together, in real time, on the same data (electroencephalographic signals). The extension is based on a client-server collaborative architecture using remote procedure call programming. Through this first implementation, general issues of computer-supported collaborative work are presented 相似文献
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Martin Hope 《中国邮电高校学报(英文版)》2012,19(4):43-48,93
The main aim of the research presented in this paper was to investigate ’how to reduce the bluetooth discovery time in collaborative middleware based collaborative working environment(CWE),to enhance the communications of mobile users.The high level collaborative middleware is a research and technology development(RTD) challenge and one of most desirable medium to long term research outputs for CWEs.This research activity outlines a collaborative middleware module that has been developed on Smartphone technology and enables to reduce the discovery time of a multi-user collaborative working environment via a Bluetooth wireless communications network.To achieve this aim,it started with discussing the key design parameters,and then the design of collaborative middleware module with collaborative functionality;finally it is a comparison test to evaluate the impact of middleware.The result of the evaluation concludes the Bluetooth enabled collaborative middleware can reduce the discovery time in CWE. 相似文献
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目前在设计方面更新技术的重要工具就是协同设计,协同设计是在统一的平台进行,其能够使得行业间的沟通得到加强.在工程机械设计中应用协同设计,能够使得设计的质量以及效率都得到显著的提升.本文围绕着协同设计在工程机械设计中的应用这一主题展开了讨论,首先介绍了我国工程机械设计的现状,随后提出了工程机械设计的CSCD体系. 相似文献
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简单阐述了当今高技术战争对雷达数据处理系统的要求,叙述了嵌入式计算机、计算机网络、嵌入式实时操作系统和COTS技术在现代雷达设计中的必要性.并就雷达实时数据处理较为关心的嵌入分布式网络体系结构、嵌入式实时操作系统、TCP/IP网络通信、并行模块设计原则、进程间通信、进程调度方式等进行了探讨,详细介绍了基于嵌入式计算机和网络技术的雷达系统软件的设计.对应用该技术前后系统的硬件结构、软件结构、系统的可扩展性、可维修性作了对比。 相似文献