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2013 IEEE International Systems Conference (SysCon)最新文献

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Early estimation of project performance: The application of a system dynamics rework model 项目绩效的早期评估:系统动力学返工模型的应用
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549883
T. Walworth, M. Yearworth, J. Davis, Paul J. Davies
We address the problem of rework in complex project management by the use of System Dynamics modeling and estimated planned performance profiles. We propose that early indications of problems arising with a project can be generated by comparing estimated planed performance profiles with actual performance profiles. Estimating project quality for use in the System Dynamics models thus becomes the key challenge to enable the use of this leading indicator. Estimates of project quality based on experience of project type, size and complexity within the organization can be used to parameterize the System Dynamics models to generate model generated estimated planned performance profiles. Early results indicate that the morphology of these profiles shows good agreement with project data emerging from the metrics initiative within Thales UK.
我们通过使用系统动力学建模和估计计划性能概况来解决复杂项目管理中的返工问题。我们建议,可以通过比较估计的计划性能概况与实际性能概况来产生项目中出现的问题的早期迹象。因此,估算用于系统动力学模型的项目质量成为启用这一领先指标的关键挑战。根据组织内项目类型、规模和复杂性的经验对项目质量进行估计,可用于参数化系统动力学模型,以生成模型生成估计的计划性能概要文件。早期结果表明,这些剖面的形态与泰利斯英国公司度量计划中出现的项目数据很好地吻合。
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引用次数: 7
Engineering safe autonomous mobile systems of systems using specification (model) based systems architecture & engineering 使用基于系统架构和工程的规范(模型)设计安全的自主移动系统
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549944
G. Hellestrand
Engineering safe, complex real-time systems is challenging. Engineering mobile systems of systems that are safe and possibly autonomous, requires considerable support from competent specification based architecture, model-based design processes and concomitant large-scale, heterogeneous simulation capabilities. Safety - the dominatrix of autonomy - is determined by requirements that then propagate through the specification, architecture, design, verification, validation and calibration phases of the real-time engineering process. In real-time systems, time is a 1st class, functional property of the system. The paper describes a specification-based architecture for the engineering of safe mobile system of systems and the modeling and simulation technology required to produce them.
设计安全、复杂的实时系统具有挑战性。工程系统的移动系统是安全的,可能是自主的,需要有能力的基于规范的架构、基于模型的设计过程和伴随的大规模、异构仿真能力的相当大的支持。安全性——自主性的主体——是由需求决定的,这些需求随后会在实时工程过程的规范、架构、设计、验证、确认和校准阶段传播。在实时系统中,时间是系统的一级功能属性。本文描述了一种基于规范的安全移动系统工程体系结构及其建模和仿真技术。
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引用次数: 3
Modeling and controlling the structure of heterogeneous mobile robotic systems: A bigactor approach 异构移动机器人系统的结构建模与控制:一种大参与者方法
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549920
E. Pereira, Camille Potiron, C. Kirsch, R. Sengupta
In this paper we address the problem of modelling and controlling heterogeneous mobile robotic systems at a structure-level abstraction. We consider a system of mobile robotic entities that are able to observe, control, compute, and communicate. They operate upon an abstraction of the structure of the world that entails location and connectivity as first-class concepts. Our approach is to model mobile robotic entities as bigActors [18], a model of computation that combines bigraphs with the actor model for modeling structure-aware computation. As case study, we model a mission of heterogeneous unmanned vehicles performing an environmental monitoring mission.
在本文中,我们在结构级抽象上解决了异构移动机器人系统的建模和控制问题。我们考虑一个能够观察、控制、计算和通信的移动机器人实体系统。它们基于世界结构的抽象,将位置和连通性作为首要概念。我们的方法是将移动机器人实体建模为bigActors[18],这是一种将图形与actor模型相结合的计算模型,用于建模结构感知计算。作为案例研究,我们对执行环境监测任务的异构无人驾驶车辆的任务进行了建模。
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引用次数: 10
Autonomous construction of structures in a dynamic environment using Reinforcement Learning 使用强化学习在动态环境中自主构建结构
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549922
S. Santos, S. Givigi, C. Nascimento
This paper presents an adaptive approach based on the Reinforcement Learning (RL) method to manipulate and transport parts and also assemble 3-D structures in a moderately constrained and dynamic environment using a quad-rotor. Nowadays, complex construction tasks using mobile robots are characterized by two fundamental problems such as task planning and motion planning. However, to obtain the task and path planning that define a specific sequence of operations for construction of a given structure is generally very complex. In this context, we propose and investigate a system in which an aerial robot learns the assembly and construction tasks of multiple 3-D structures. This process involves the learning of the sequence of maneuvers of a vehicle, the assembly sequence of the parts and also the correct types of structural elements for each assembly point of the structure. A heuristic search algorithm is used in the learning process to find the optimal path for the quad-rotor so that its navigation through the dynamic environment is performed. The experimental results show that a 3-D structure can be built using the task planning approach derived from a learning algorithm combined with a heuristic search method.
本文提出了一种基于强化学习(RL)方法的自适应方法,用于在中等约束和动态环境中使用四旋翼操纵和运输零件以及组装三维结构。目前,移动机器人的复杂施工任务有两个基本问题:任务规划和运动规划。然而,要获得任务和路径规划,为给定结构的构建定义特定的操作序列通常是非常复杂的。在此背景下,我们提出并研究了一个空中机器人学习多个三维结构的组装和建造任务的系统。这个过程包括学习车辆的动作顺序,零件的装配顺序以及结构的每个装配点的结构元素的正确类型。在学习过程中,采用启发式搜索算法为四旋翼飞行器寻找最优路径,实现四旋翼飞行器在动态环境中的导航。实验结果表明,采用启发式搜索和学习算法相结合的任务规划方法可以构建三维结构。
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引用次数: 13
Applying model based systems engineering to NASA's space communications networks 将基于模型的系统工程应用于NASA的空间通信网络
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549901
K. Bhasin, Patrick Barnes, Jessica M. Reinert, Bert Golden
System engineering practices for complex systems and networks now require that requirement, architecture, and concept of operations product development teams, simultaneously harmonize their activities to provide timely, useful and cost-effective products. When dealing with complex systems of systems, traditional systems engineering methodology quickly falls short of achieving project objectives. This approach is encumbered by the use of a number of disparate hardware and software tools, spreadsheets and documents to grasp the concept of the network design and operation. In case of NASA's space communication networks, since the networks are geographically distributed, and so are its subject matter experts, the team is challenged to create a common language and tools to produce its products. Using Model Based Systems Engineering methods and tools allows for a unified representation of the system in a model that enables a highly related level of detail. To date, Program System Engineering (PSE) team has been able to model each network from their top-level operational activities and system functions down to the atomic level through relational modeling decomposition. These models allow for a better understanding of the relationships between NASA's stakeholders, internal organizations, and impacts to all related entities due to integration and sustainment of existing systems. Understanding the existing systems is essential to accurate and detailed study of integration options being considered. In this paper, we identify the challenges the PSE team faced in its quest to unify complex legacy space communications networks and their operational processes. We describe the initial approaches undertaken and the evolution toward model based system engineering applied to produce Space Communication and Navigation (SCaN) PSE products. We will demonstrate the practice of Model Based System Engineering applied to integrating space communication networks and the summary of its results and impact. We will highlight the insights gained by applying the Model Based System Engineering and provide recommendations for its applications and improvements.
复杂系统和网络的系统工程实践现在需要需求、架构和操作产品开发团队的概念,同时协调他们的活动,以提供及时的、有用的和具有成本效益的产品。当处理复杂的系统的系统时,传统的系统工程方法很快就不能达到项目目标。这种方法由于使用许多不同的硬件和软件工具、电子表格和文档来掌握网络设计和操作的概念而受到阻碍。以NASA的空间通信网络为例,由于网络是地理分布的,其主题专家也是如此,因此团队面临的挑战是创建一种通用语言和工具来生产其产品。使用基于模型的系统工程方法和工具允许在模型中对系统进行统一表示,从而实现高度相关的详细级别。到目前为止,程序系统工程(PSE)团队已经能够通过关系建模分解,从它们的顶级操作活动和系统功能到原子级别对每个网络进行建模。这些模型可以更好地理解NASA利益相关者、内部组织之间的关系,以及由于集成和维持现有系统而对所有相关实体的影响。了解现有系统对于准确和详细地研究正在考虑的集成选择是必不可少的。在本文中,我们确定了PSE团队在寻求统一复杂的遗留空间通信网络及其操作流程时所面临的挑战。我们描述了用于生产空间通信和导航(SCaN) PSE产品的基于模型的系统工程的最初方法和演变。我们将演示基于模型的系统工程应用于集成空间通信网络的实践,并总结其结果和影响。我们将强调通过应用基于模型的系统工程获得的见解,并为其应用和改进提供建议。
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引用次数: 3
Towards policy and guidelines for the selection of computational engines 制定计算引擎选择的政策和指导方针
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549864
R. Hernandez, John Faella
Much research has been performed that concentrates on providing processing throughput enhancements to existing algorithms. Many systems have performance requirements that constrain their volume and/or power consumption. For volume and power consumption constrained systems, throughput cannot be the only decision factor when selecting a computational engine. Typical studies can aid in the selection of computational engines that meet the throughput requirements of a system, but may be of little help with respect to the volume, power and thermal constraints. This paper takes a different approach to help provide a different perspective on the constrained design problem. The research performed in this paper emphasizes the cost due to the power, size and Non-Recurring Engineering (NRE) costs of various computational engines. The computational engines researched in this paper are: Central Processing Unit (CPU), mobile CPU, Digital Signal Processor (DSP), and mobile Graphics Processing Unit (GPU). The various architectures are compared against each other with respect to throughput, power, size and NRE costs. The authors hope that the process outlined in this paper may serve as a possible guideline for other Systems Engineers to perform similar Analysis of Alternatives of computational engines. Furthermore, the authors hope that the methods used for the relative performance evaluations will serve as a starting point to help shape policy in the selection of computational engines for future designs.
许多研究都集中在为现有算法提供处理吞吐量增强上。许多系统的性能要求限制了它们的体积和/或功耗。对于体积和功耗受限的系统,在选择计算引擎时,吞吐量不能是唯一的决定因素。典型的研究可以帮助选择满足系统吞吐量要求的计算引擎,但在体积、功率和热限制方面可能没有什么帮助。本文采用了一种不同的方法来帮助提供对约束设计问题的不同视角。本文的研究强调了各种计算引擎的功率、尺寸和非重复工程(NRE)成本。本文研究的计算引擎有:中央处理器(CPU)、移动CPU、数字信号处理器(DSP)和移动图形处理器(GPU)。各种架构在吞吐量、功耗、大小和NRE成本方面相互比较。作者希望本文中概述的过程可以作为其他系统工程师执行类似计算引擎替代分析的可能指南。此外,作者希望用于相对性能评估的方法将作为一个起点,帮助制定未来设计中选择计算引擎的政策。
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引用次数: 4
From research project objectives to milestones by means of requirements traceability Realization of an autonomous maritime system 从研究项目目标到里程碑,通过需求可追溯性实现自主海事系统
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549965
C. Insaurralde, Y. Pétillot
Current research projects are developing technologies that require more and more the integration of different system capabilities placed at geographically-dispersed locations. The challenge when integrating system capabilities is to choose the right system components to be integrated in order to fulfill the deadline given by the project milestones. This paper proposes a method that shows how project objectives are achieved by means of tracing the requirements across the system development lifecycle until the milestones are reached. The approach proposed turns project objectives and its context into user requirements as well as evaluation cases into project milestones. The integration process consists of integrating functional capabilities from the system modules which are the foundation to support operational capabilities. This paper also presents a review of the stages of the system development lifecycle, and architectural elements of the system under development. It also describes aspects of the planning and scheduling for the implementation of an illustrative case study based on an autonomous maritime system, and their impact on the integration process.
目前的研究项目正在开发技术,这些技术越来越多地需要在地理上分散的位置集成不同的系统功能。集成系统功能时面临的挑战是选择要集成的正确系统组件,以完成项目里程碑给出的最后期限。本文提出了一种方法,通过在整个系统开发生命周期中跟踪需求,直到达到里程碑,来显示项目目标是如何实现的。所建议的方法将项目目标及其上下文转换为用户需求,并将评估用例转换为项目里程碑。集成过程包括集成来自系统模块的功能能力,这些功能能力是支持操作能力的基础。本文还介绍了系统开发生命周期的各个阶段,以及正在开发的系统的架构元素。它还描述了基于自主海事系统的说明性案例研究实施的规划和调度方面,以及它们对集成过程的影响。
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引用次数: 0
A method for the technical feasibility assessment of electrical vehicle penetration 一种电动汽车渗透技术可行性评价方法
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549945
Reem Al Junaibi, A. Farid
In recent years, electric vehicles (EVs) have gained much attention as a potential enabling technology to support CO2 emissions reduction targets. Furthermore, many of the cost and vehicle technology barriers that have prevented their adoption in the past are increasingly being addressed by vehicle manufacturers. Nevertheless, the question remains as to whether EVs themselves will be technically feasible within the larger infrastructure systems with which they interact. Fundamentally, EVs interact with three interconnected `systems-of-systems': the (physical) transportation system, the electric power grid, and their supporting information systems often called intelligent transportation systems (ITS). These systems affect the EV operation in potentially constraining ways that can negatively impact the EV user's final transportation experience. This paper seeks to understand and assess these interactions in such a way as to evaluate their ultimate technical feasibility in relation to their supporting infrastructure systems. A new assessment method based upon modeling tools for each infrastructure system is proposed. For the traffic system, a microscopic discrete-time traffic operations simulator is used to study the kinematic state of the EV fleet at all times. For the electric power system, power flow analysis is used to determine the electrical charging loads required by the EV traffic usage patterns. Finally, UML is used to model the intelligent transportation system functionality as compared to a template of functions deemed necessary to support EV integration. The final method of technical feasibility assessment is demonstrated on a hypothetical scenario which conceptualizes the EV adoption scenario by a taxi service operator.
近年来,电动汽车作为一种潜在的支持二氧化碳减排目标的技术受到了广泛关注。此外,过去阻碍自动驾驶汽车采用的许多成本和车辆技术障碍正日益得到汽车制造商的解决。然而,问题仍然是电动汽车本身在与之交互的更大的基础设施系统中是否在技术上可行。从根本上说,电动汽车与三个相互关联的“系统的系统”相互作用:(物理)运输系统,电网及其支持的信息系统,通常称为智能交通系统(ITS)。这些系统会以潜在的限制性方式影响电动汽车的运行,从而对电动汽车用户的最终出行体验产生负面影响。本文试图以这样一种方式来理解和评估这些相互作用,以评估它们与支持基础设施系统相关的最终技术可行性。提出了一种基于各基础设施系统建模工具的评估方法。对于交通系统,采用微观离散时间交通运行模拟器研究电动汽车车队在各个时刻的运动状态。对于电力系统,潮流分析用于确定电动汽车交通使用模式所需的充电负荷。最后,使用UML对智能交通系统功能进行建模,并将其与被认为是支持EV集成所必需的功能模板进行比较。最后的技术可行性评估方法在一个假设的场景中进行了演示,该场景概念化了出租车服务运营商采用电动汽车的场景。
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引用次数: 18
Quantifying the effectiveness of systems engineering 量化系统工程的有效性
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549850
J. Elm, Dennis R. Goldenson
This paper summarizes the results of a survey that had the goal of quantifying the connection between the application of systems engineering (SE) best practices to projects and programs and the performance outcomes of those projects and programs. The survey population consisted of projects and programs executed by system developers reached through the National Defense Industrial Association (NDIA) Systems Engineering Division, the Institute of Electrical and Electronics Engineers (IEEE) Aerospace and Electronic Systems Society, and the International Council on Systems Engineering (INCOSE). Analysis of survey responses revealed strong statistical relationships between project performance and several categories of specific SE best practices. The survey results show notable differences in the relationship between SE best practices and performance between more challenging and less challenging projects. The statistical relationship with project performance is quite strong for survey data of this kind when both SE capability and project challenge are considered together.
本文总结了一项调查的结果,该调查的目标是量化系统工程(SE)最佳实践对项目和规划的应用与这些项目和规划的性能结果之间的联系。调查对象包括通过国防工业协会(NDIA)系统工程部、电气和电子工程师协会(IEEE)航空航天和电子系统协会以及国际系统工程委员会(INCOSE)获得的系统开发人员执行的项目和程序。对调查结果的分析揭示了项目绩效与特定SE最佳实践的几个类别之间强有力的统计关系。调查结果显示在SE最佳实践和更具挑战性和较少挑战性项目之间的绩效之间的关系存在显著差异。当同时考虑SE能力和项目挑战时,这类调查数据与项目绩效的统计关系非常强。
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引用次数: 6
Object identification and classification in a high resolution satellite data using data mining techniques for knowledge extraction 在高分辨率卫星数据中利用数据挖掘技术进行目标识别与分类的知识提取
Pub Date : 2013-04-15 DOI: 10.1109/SysCon.2013.6549967
Nikhil Mantrawadi, Mais Nijim, Young Lee
The interpretation of remotely sensed images in a spatiotemporal context is becoming a valuable research topic. Today's optical sensor systems on satellite provide large-area images with 1-m resolution and better, which can deliver complement information to traditional acquired data. However, the constant growth of data volume in remote sensing imaging makes reaching conclusions based on collected data a challenging task. One of the main problems that arise during the data mining process is treating data that contains temporal information. However, two important issues must be considered in order to provide more accurate decisions on object identification and pattern recognition. First, the continuous growth of the dataset storage space and the advances in remote sensing sensors which generate a huge amount of satellite images making the manual image interpretation a difficult task. Second, the space/time components are inherent to satellite images; systems being developed to identify objects must take into account the spatiotemporal context to better interpret the collected image data. Spatial relations between objects are widely used in context-based image retrieval. This paper outlines the challenges and proposes in creation of a data mines capable of supporting the requirements of the system, which, inevitably demand a high level of cooperation between many disparate sources of spatial data.
遥感影像的时空解译正成为一个有价值的研究课题。目前的卫星光学传感器系统可以提供1米以上分辨率的大面积图像,可以对传统的采集数据提供补充信息。然而,随着遥感成像数据量的不断增长,根据收集到的数据得出结论是一项具有挑战性的任务。在数据挖掘过程中出现的主要问题之一是处理包含时间信息的数据。然而,为了在对象识别和模式识别方面提供更准确的决策,必须考虑两个重要问题。首先,数据集存储空间的不断增长和遥感传感器的进步产生了大量的卫星图像,使得人工图像解译成为一项艰巨的任务。其次,空间/时间分量是卫星图像固有的;正在开发的识别物体的系统必须考虑到时空背景,以便更好地解释收集到的图像数据。对象间的空间关系在基于上下文的图像检索中得到了广泛的应用。本文概述了所面临的挑战,并提出了创建能够支持系统需求的数据挖掘的建议,这不可避免地要求许多不同空间数据源之间的高水平合作。
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引用次数: 8
期刊
2013 IEEE International Systems Conference (SysCon)
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