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2015 10th System of Systems Engineering Conference (SoSE)最新文献

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A service oriented virtual environment for complex system analysis: Preliminary report 用于复杂系统分析的面向服务的虚拟环境:初步报告
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151972
C. Dickerson, S. J. Clement, D. Webster, D. McKee, Jie Xu, D. Battersby
Distributed virtual simulation is a capability that is increasing in demand within the automotive manufacturing industry. The distributed and networked approach to system level design and simulation stands to benefit from a unifying relational oriented modeling and simulation framework due to the large number of simulation technologies that must be integrated. This will also permit innovative use of existing independent simulations for increased concurrency in design and verification and validation. Through relational orientation, high level syntax and semantics for representing models and simulations have been developed for proof of concept analysis. This paper presents an approach to drive a process of analysis of the vehicle as a complex system through the combination of a relational trade-off analysis framework and a distributed simulation execution delivered through a service-oriented integration architecture. This promises to provide a rigorous, traceable and agile approach to early stage conceptual vehicle design and analysis.
分布式虚拟仿真是汽车制造行业中需求日益增长的一种功能。由于必须集成大量的仿真技术,分布式和网络化的系统级设计和仿真方法将受益于统一的面向关系的建模和仿真框架。这也将允许创新地使用现有的独立模拟,以增加设计和验证的并发性。通过面向关系,已经开发了用于表示模型和模拟的高级语法和语义,用于概念分析的证明。本文提出了一种方法,通过将关系权衡分析框架和通过面向服务的集成体系结构交付的分布式仿真执行相结合,来驱动作为复杂系统的车辆分析过程。这有望为早期概念车辆设计和分析提供严格、可追溯和敏捷的方法。
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引用次数: 1
Real-time direct field-oriented and second order sliding mode controllers of induction motor for electric vehicles applications 用于电动汽车的感应电动机实时直接磁场定向和二阶滑模控制器
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151989
Eduardo Quintero-Manriquez, E. Sánchez, R. A. Félix
This paper presents a comparison between two control techniques: Direct Field-Oriented Control (DFOC) and Second Order Sliding Mode Control (SOSMC), both on real-time implementations. DFOC is one of the most popular control strategies in the industry for induction motor drives and has the advantage to produce a continuous control signal, helping to extend life of electric vehicle batteries. On the other hand SOSMC is based on the super-twisting algorithm, which reduces chattering, rejects disturbances and produces a continuous control signal. To modulate the inverter pulses, Space Vector Modulation (SVM) is used and to estimate the rotor flux, a sliding mode observer is applied. Real-time implementation of these controllers have been successfully done, using a 1/4 hp induction motor prototype. Results are presented to illustrate the respective advantages and drawbacks. The proposed schemes allow easy integration of these kind of vehicles into a system of systems configuration.
本文介绍了直接场定向控制(DFOC)和二阶滑模控制(SOSMC)两种控制技术在实时实现上的比较。DFOC是感应电机驱动行业中最流行的控制策略之一,具有产生连续控制信号的优势,有助于延长电动汽车电池的寿命。另一方面,基于超扭转算法的超扭转控制系统可以减少抖振,抑制干扰,产生连续的控制信号。利用空间矢量调制(SVM)对逆变器脉冲进行调制,并利用滑模观测器估计转子磁链。这些控制器的实时实现已经成功完成,使用1/4马力的感应电机原型。结果说明了各自的优点和缺点。所提出的方案可以很容易地将这些类型的车辆集成到系统配置的系统中。
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引用次数: 6
Bond graph model-based for fault tolerance level assessment of a wireless communication link in a system of systems concept 基于键图模型的系统概念系统中无线通信链路容错水平评估
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151934
Ahmad Koubeissi, M. Ayache, R. Merzouki, B. Conrard
The main focus of this paper is on graphical modeling of wireless link of a System of Systems (SoS) for the purpose of Fault Tolerance Level Assessment. Having used hypergraphs previously for modeling the structural organization of SoS, it's now important to introduce another graphical tool for modeling the wireless communication channel (WCL) between component systems of SoS, namely Bond Graph, and to evaluate at the same time, the fault tolerance level of each WCL so that we are able to compare various SoS configurations in terms of communication reliability and robustness. We perform an experiment on cooperative behavior of NAO humanoids forming an SoS to exploit model benefits at microscopic level and at macroscopic level, by developing a simulator that demonstrates how we can assess the fault tolerance level of each WCL in SoS.
本文主要研究了多系统系统(System of Systems, SoS)无线链路的图形化建模,用于容错水平评估。在之前使用超图对SoS的结构组织进行建模之后,现在重要的是引入另一种图形工具,用于对SoS组件系统之间的无线通信通道(WCL)进行建模,即Bond Graph,同时评估每个WCL的容错级别,以便我们能够在通信可靠性和鲁棒性方面比较不同的SoS配置。我们通过开发一个模拟器来演示我们如何评估SoS中每个WCL的容错水平,对NAO类人组织形成SoS的合作行为进行了实验,以在微观和宏观层面上利用模型收益。
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引用次数: 1
Modeling and dynamic control for a hexapod robot 六足机器人建模与动态控制
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151914
F. Sahin, Brianne Stevenson
In the every expanding field of robotics, mobile robots come in a two primary variations: wheeled and legged. This paper will focus on the latter, specifically a hexapod with a circular body that has its six legs distributed axisymmetrically around the body. The core goal of the project discussed here is to allow the robot to dynamically change foot placement based on an input vector in addition to controlling the position and orientation of the body. Specific attention is also given to a simulation model that can mimic this control of the robot in a virtual environment. Having a high level of control enhances the robot's ability to move in a very smooth and purposeful manner.
在每一个不断扩展的机器人领域,移动机器人主要有两种形式:轮式和腿式。本文将重点研究后者,具体来说,是一种六足体,它有一个圆形的身体,它的六条腿围绕身体轴对称分布。这里讨论的项目的核心目标是允许机器人除了控制身体的位置和方向外,还可以根据输入向量动态改变脚的位置。还特别注意了一个仿真模型,该模型可以在虚拟环境中模拟机器人的这种控制。具有高水平的控制增强了机器人以非常平稳和有目的的方式移动的能力。
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引用次数: 3
Distributed super twisting controller for multiple quadrotors 分布式多旋翼超扭控制器
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151977
L. Luque-Vega, Luis Enrique González Jiménez, B. Castillo-Toledo, A. Loukianov, J. Ghommam, M. Saad
The distributed cooperative tracking control problem for a group of quadrotors in a three-dimensional space is addressed in this paper. The controller design is divided in two stages. In the first stage, local distributed controllers for the translational dynamics are designed, forcing the quadrotor to asymptotically track the desired trajectory with the required separation and therefore a specific formation. In the second stage, the rotational dynamics is asymptotically stabilized. The controllers implemented in both stages are based in a combination of block control technique and the super twisting control algorithm which ensures robustness with respect to external disturbances and parameter uncertainties. Moreover, a first order exact differentiator is used to estimate the virtual control inputs, simplifying the control law design. The stability proof of the complete closed-loop system is shown to be asymptotically stable. Finally, numerical simulations are carried out to show that theoretical conclusions are effective.
研究了一组四旋翼机在三维空间中的分布式协同跟踪控制问题。控制器设计分为两个阶段。在第一阶段,为平移动力学设计了局部分布式控制器,迫使四旋翼飞行器以所需的分离渐近跟踪所需的轨迹,从而形成特定的编队。在第二阶段,旋转动力学渐近稳定。在这两个阶段实现的控制器都是基于块控制技术和超扭转控制算法的结合,以确保对外部干扰和参数不确定性的鲁棒性。采用一阶精确微分器估计虚拟控制输入,简化了控制律的设计。给出了完整闭环系统渐近稳定的稳定性证明。最后通过数值模拟验证了理论结论的有效性。
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引用次数: 1
Systems modeling and intelligent control of meat drying process 肉类干燥过程的系统建模与智能控制
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151964
Hong Ma, Wei Zhang, Simon X. Yang
The objective of this research is to develop a system model and an intelligent controller for the meat drying process, which will lead to better control accuracy than the current PID control system used in meat manufacturing. In meat drying rooms, temperature and relative humidity are coupled by nonlinear thermodynamic laws. The coupling results in nonlinear fluctuations in relative humidity. The classical PID control method is not able to effectively control the relative humidity. The models of the systems of temperature and relative humidity for a meat drying room in this paper include the model of the plant, the model of the coupling, the controller, and the complete control system of the meat drying room. The proposed intelligent control uses the methods of a fuzzy PID controller to limit the fluctuations in the meat drying system. Results show that the performance of the proposed fuzzy PID control systems is superior in terms of relative humidity control to the classical PID control method used in the current control systems for the meat drying rooms.
本研究的目的是建立一个肉类干燥过程的系统模型和智能控制器,使其比目前用于肉类制造的PID控制系统具有更好的控制精度。在肉类干燥室内,温度和相对湿度是非线性热力学规律耦合的。这种耦合导致了相对湿度的非线性波动。传统的PID控制方法不能有效地控制相对湿度。本文研究的肉类干燥室温度和相对湿度系统的模型包括装置模型、耦合模型、控制器模型和整个肉类干燥室控制系统。本文提出的智能控制采用模糊PID控制器的方法来限制肉类干燥系统的波动。结果表明,本文提出的模糊PID控制系统在相对湿度控制方面的性能优于目前用于肉类干燥室控制系统的经典PID控制方法。
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引用次数: 6
Simulating SysML models: Overview and challenges 模拟SysML模型:概述和挑战
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151961
M. Nikolaidou, G. Kapos, Anargyros Tsadimas, V. Dalakas, D. Anagnostopoulos
SysML language, proposed by OMG, is a commonly accepted standard to model and study systems-of-systems (SoS). It provides the means to depict SoS components and their behavior in a multi-layer fashion and explore alterative architectures for their design. To validate SysML models in terms of performance criteria, simulation is usually the preferred method employed. To this end, different SysML diagrams are utilized, while numerous simulation methodologies and tools are employed. There are many efforts targeting simulation code generation from SysML models. Model-based system engineering concepts are adopted in most of them to generate simulation models from SysML models. Nevertheless, this process is not standardized, although most of current approaches tend to follow the same steps, even if they employ different tools. The scope of this paper is to provide a comprehensive understanding of the similarities and differences of existing approaches and identify current challenges in fully automating SysML models simulation process.
由OMG提出的SysML语言是一种被普遍接受的用于建模和研究系统的系统(system -of-systems, so)的标准。它提供了以多层方式描述SoS组件及其行为的方法,并探索其设计的替代体系结构。为了根据性能标准验证SysML模型,仿真通常是首选的方法。为此,使用了不同的SysML图,同时使用了许多仿真方法和工具。有许多针对从SysML模型生成仿真代码的工作。它们大多采用基于模型的系统工程概念,从SysML模型生成仿真模型。然而,这个过程并不是标准化的,尽管大多数当前的方法倾向于遵循相同的步骤,即使它们使用不同的工具。本文的范围是提供对现有方法的异同的全面理解,并确定当前在完全自动化SysML模型仿真过程中的挑战。
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引用次数: 18
Smart data-harnessing for financial value in short-term hire electric car schemes 利用智能数据为短期租赁电动汽车计划创造经济价值
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151928
P. Cooper, Tom Crick, T. Tryfonas
In the developed world, two distinct trends are emerging to shake-up the current dominance of privately-owned, combustion motor car transport. The first is the emergence of the electric powertrain for vehicles as an affordable and massmarketed means of transport. This carries with it the potential to address many of the immediate shortcomings of the current paradigm, especially CO2 emissions, air and noise pollution. The second is the rise of new hire models of car ownership - the concept of paying for the use of a car as and when you need it. This carries with it the potential to address many of the existing issues: outlay-induced car use, residential parking and social division. On a similar timescale, we are witnessing the rise of smart technologies and smart cities, concepts that use data about the state of a system or elements of it to create value. There have been relatively few examples of schemes that have combined the electric and hire-model concepts, despite the huge potential for synergy. Indeed, the majority is against them on both counts - cars are predominantly privately-owned and driven by internal combustion engines. Nevertheless, there is significant potential for this to change over the coming years.
在发达国家,两种截然不同的趋势正在出现,将撼动目前私人拥有的内燃机汽车运输的主导地位。首先是汽车电动动力系统的出现,作为一种负担得起的大规模销售的交通工具。这有可能解决当前模式的许多直接缺陷,特别是二氧化碳排放、空气和噪音污染。其次是汽车所有权新租赁模式的兴起,即在需要时付费使用汽车的概念。这有可能解决许多现有的问题:支出导致的汽车使用、住宅停车和社会分化。在类似的时间尺度上,我们正在目睹智能技术和智能城市的兴起,这些概念使用有关系统状态或其元素的数据来创造价值。尽管有巨大的协同潜力,但将电动和租赁模式概念结合起来的方案的例子相对较少。事实上,大多数人在这两方面都反对它们——汽车主要是私人所有的,而且是由内燃机驱动的。然而,在未来几年,这种情况很有可能发生变化。
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引用次数: 2
Noise level classification for EEG using Hidden Markov Models 基于隐马尔可夫模型的脑电信号噪声等级分类
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151974
Sherif Haggag, Shady M. K. Mohamed, A. Bhatti, H. Haggag, S. Nahavandi
EEG signal is one of the most important signals for diagnosing some diseases. EEG is always recorded with an amount of noise, the more noise is recorded the less quality is the EEG signal. The included noise can represent the quality of the recorded EEG signal, this paper proposes a signal quality assessment method for EEG signal. The method generates an automated measure to detect the noise level of the recorded EEG signal. Mel-Frequency Cepstrum Coefficient is used to represent the signals. Hidden Markov Models were used to build a classification model that classifies the EEG signals based on the noise level associated with the signal. This EEG quality assessment measure will help doctors and researchers to focus on the patterns in the signal that have high signal to noise ratio and carry more information. Moreover, our model was applied on an uncontrolled environment and on controlled environment and a result comparison was applied.
脑电图信号是诊断某些疾病的重要信号之一。记录的脑电信号总是带有一定的噪声,记录的噪声越大,脑电信号的质量就越差。所含噪声可以反映记录的脑电信号的质量,本文提出了一种脑电信号质量评价方法。该方法产生一个自动测量来检测所记录的脑电图信号的噪声水平。用Mel-Frequency倒频谱系数表示信号。利用隐马尔可夫模型建立分类模型,根据与脑电信号相关的噪声水平对脑电信号进行分类。这种脑电图质量评价方法有助于医生和研究者关注信号中信噪比高、信息量大的模式。并将模型应用于非受控环境和受控环境,并进行了结果比较。
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引用次数: 1
Omnidirectional rule-based free gait utilizing restrictedness 利用约束的全向规则自由步态
Pub Date : 2015-05-17 DOI: 10.1109/SYSOSE.2015.7151903
Chris Johnson, F. Sahin
Adaptable gaits are pivotal for allowing legged robots to navigate difficult terrain. One of the best gait styles to accomplish this goal is the rule-based free gait. First the forward and inverse kinematic solutions are solved for TigerBug, a circular hexapod. Then a rule based free gait is implemented on the circular hexapod in order to provide a platform for future rough terrain navigation.
适应性步态是让有腿机器人在复杂地形上行走的关键。实现这一目标的最佳步态之一是基于规则的自由步态。首先求解了虎虫六足体的正解和逆解。然后在圆六足机器人上实现了基于规则的自由步态,为未来的崎岖地形导航提供平台。
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引用次数: 2
期刊
2015 10th System of Systems Engineering Conference (SoSE)
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