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多计算机系统的关键设计之一是互连网络。本文分析和介绍了用于多计算机并行系统的各种典型的互连结构,从拓扑角度分析了各种互连结构的通信性能和路径控制算法。重点讨论了链路型和总线型互连网络,并分析了通信的局部性对性能的影响。 相似文献
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在平衡性能、成本以及实现的基础上,给出了一种新的片上互连网络--广义 Petersen 图互连网络 GP(2m,1),是一种拓扑结构简单、节点度小、网络成本较低,并且具有对称性以及艮好扩展性的平面互连网络.GP(2m,1)互连网络节点采用一种新的约翰逊编码方法,使得路由算法简单高效.在不同负载和不同节点数量情况下,对GP(2m,1)、Ring和2D Mesh网络的平均通讯延迟和平均吞吐量进行了模拟分析,结果表明GP(2m,1)互连网络较好的平衡了网络性能和成本,是一种简单高效的片上互连网络. 相似文献
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基于分布交互仿真(Distributed Interactive Simulation,简称DIS)和高层体系结构(HighLevel Architecture,简称HLA)的跨协议互连技术是最近的研究难点和热点。讨论了DIS和HLA在分布交互仿真应用方面的特点,针对基于DIS和HLA的仿真系统间的互连问题,提出了一种基于双桥接器和Socket通信的分布交互仿真跨协议互连方法,其中包括DIS演练和HLA联邦间的实体协议转换、事件协议转换和时间管理策略等。应用结果表明,该方法在处理分布交互仿真系统的跨协议互连方面是可行的。 相似文献
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一种基于RLC互连线系统的串扰仿真方法研究 总被引:1,自引:0,他引:1
提出了一种基于均匀RLC耦合互连线系统的串扰噪声仿真方法.该方法将耦合互连线模型在线元分析阶段即进行复频域解耦,使原本复杂的耦合互连线元模型转化为独立互连线元模型,进而简化之后的串扰噪声的仿真分析过程.最后运用数值方法得到均匀RLC互连线串扰噪声的时域估计表达式.仿真实验结果相较于PSPICE结果的误差小于5%,表明了该方法可以对均匀RLC互连线串扰噪声进行有效的仿真和评估. 相似文献
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提出一种基于工艺随机扰动的非均匀RLC互连线串扰分析方法;同时建立了互连线随机扰动模型.通过解耦技术将耦合非均匀互连线模型转化为独立互连线模型,从而简化了分析,并利用新的逼近模型对数值结果进行复频域的函数逼近,提高了算法精度.最后将算法应用到多根耦合互连线互连的情况,拓展了算法可计算的电路规模.实验结果表明算法可以对工艺随机扰动下的耦合互连线串扰进行有效评估. 相似文献
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提出了一种高速背板互连的信号完整性仿真方法。高速接插件的厂商只提供参数模型,借助矢量拟合方法可以推导出电路模型,再使用部分元等效电路法仿真走线得到等效电路模型。推导出联合仿真的方法,实现了高速背板互连的信号完整性仿真。通过等效电路的仿真结果和厂商提供的原始参数进行的比较,以及部分元等效电路法与商用软件仿真结果的比较验证了等效电路的正确性。最后对完整的板间互连通道进行了仿真,并将最终的仿真结果与商用软件的仿真结果进行了比较,证明了所提方法的正确性,给出了整个通道眼图仿真分析结果。 相似文献
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WANG zheng LI Zhong |hai ZHANG Si |ying HOU Xue |zhang .School of Information Science Information Engineering Northeastern University Shenyang China .Mathematics Department Towson University Baltimore Maryland 《系统科学与系统工程学报(英文版)》2000,(3)
1 IntroductionThecontrolsystemhasbecomeverylargeandmuchcomplexinmodernsocietyandscienceandtechnique .Themoreefficientcontrolschemehasbeenneededtocontrolthesecomplicatedsys tems .Thedimensionsofthesesystemsareveryhigh ;theinterconnectionsbetweenthesubsys … 相似文献
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In recent years, networked distributed control systems (NDCS) have received research attention. Two of the main challenges that such systems face are possible delays in the communication network and the effect of strong interconnections between agents. This paper considers an NDCS that has delays in the communication network, as well as strong interconnections between its agents. The control objective is to make each agent track efficiently a reference model by attenuating the effect of strong interconnections via feedback based on the delayed information. First, the authors assume that each agent knows its own dynamics, as well as the interconnection parameters, but receives information about the states of its neighbors with some communication delay. The authors propose a distributed control scheme and prove that if the interconnections can be weakened and if the communication delays are small enough, then the proposed scheme guarantees that the tracking error of each agent is bounded with a bound that depends on the size of the weakened interconnections and delays, and reduces to zero as these uncertainties reduce to zero. The authors then consider a more realistic situation where the interconnections between agents are unknown despite the cooperation and sharing of state information. For this case the authors propose a distributed adaptive control scheme and prove that the proposed scheme guarantees that the tracking errors are bounded and small in the mean square sense with respect to the size of the weakened interconnections and delays, provided the weakened interconnections and time delays are small enough. The authors then consider the case that each agent knows neither its dynamics nor the interconnection matrices. For this case the authors propose a distributed adaptive control scheme and prove that the proposed scheme guarantees that the tracking errors are bounded and small in the mean square sense provided the weakened interconnections and time delays are small enough. Finally, the authors present an illustrative example to present the applicability and effectiveness of the proposed schemes. 相似文献
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WANG Zheng LI Zhong hai ZHANG Si ying HOU Xue-zhang .School of Information Science Information Engineering Northeastern Unviersity Shenyang China .Mathematics Department Towson University Baltimore Maryland U.S 《系统科学与系统工程学报(英文版)》2001,10(1)
1 IntroductionThe control system has become very large and much complex in modern society and scienceand technique.The more efficient control scheme has been needed to control thesecomplicated systems.The dimensions ofthese systems are very high;the interconnectionsbetween the subsystems are much complicated.It is difficulty to get the generalconclusions by means of the methods presented.In1 987,We[1 ] began to study the subjecton complicated systems with similarity and symmetry.Itis emphas… 相似文献
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提出近场光存储光学头飞行问题的综合仿真方案,采用控制体积法求解表面形貌复杂的空气轴承气浮力分布,采用准牛顿迭代法求解光学头稳定飞行姿态;并以此为基础,分析空气轴承表面形貌参数对光学头稳定飞行姿态的影响规律,对其进行优化设计;所设计的光学头飞高为73.87nm,且飞行姿态稳定,满足近场光存储信号读写的要求. 相似文献
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以固定翼小型无人机的自主着陆控制为研究背景,提出了一种基于光流的固定翼小型无人机自主着陆控制方法。该方法首先在分析固定翼飞行器着陆段运动特性的基础上,将着陆阶段的控制解耦为对飞行器的横向控制和纵向控制,然后以跑道线作为特征,计算其稀疏直线光流场,并结合摄像机模型以及光流场和速度场之间的关系,用跑道线的水平流作为系统反馈,设计控制系统。最后在Simulink环境下搭建动态仿真系统,仿真结果表明,使用本文方法可以有效实现飞行器的自主着陆控制。 相似文献
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光学复眼视场大、视角多、分辨率高,具备与小型航空器共形结合的优势,在侦察监视、目标探测和图像导航等方面具有应用价值。针对实际应用中存在的光学复眼设计研制周期长、航空器飞行成本高的现状,设计了一种面向小型航空器应用的光学复眼仿真软件。该软件集复眼成像、航空器模拟、数据管理于一体,各功能接口可扩展。仿真表明,在9个子眼的配置下仿真帧率可达到23.3fps,结果精确。该软件可用于光学复眼设计方案优选与应用算法验证,对面向航空器应用的复眼系统研制具有重要意义。 相似文献
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Non-fragile guaranteed cost control for uncertain neutral large-scale interconnected systems 下载免费PDF全文
This paper focuses on the problem of non-fragile decentralized guaranteed cost control for uncertain neutral large-scale interconnected systems with time-varying delays in state, control input and interconnections. A novel scheme, viewing the interconnections with time-varying delays as effective information but not disturbances, is developed. Based on Lyapunov stability theory, using various techniques of decomposing and magnifying matrices, a design method of the non-fragile decentralized guaranteed cost controller for unperturbed neutral large-scale interconnected systems is proposed and the guaranteed cost is presented. The further results are derived for the uncertain case from the criterion of unperturbed neutral large-scale interconnected systems. Finally, an illustrative example shows that the results are significantly better than the existing results in the literatures. 相似文献
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基于HS约束与轮廓条件的光流场计算 总被引:1,自引:0,他引:1
针对视频图像中灰度变化与速度场可能存在的非连续区域,提出了一种基于HS(Horn-Schunck)约束与轮廓条件的光流场计算新方法。该方法首先采用高斯滤波器减少噪声干扰;然后采用改进的Horn-Schunck算法计算时空梯度,结合两种不同的约束条件求取光流速度;最后的仿真实验结果表明,该方法能够准确地计算视频图像非连续区域的光流场,并有更好的鲁棒性。 相似文献