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2016 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)最新文献

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Following the path towards intelligently connected devices for on-line, real-time cardiac arrhythmia detection and classification 遵循智能连接设备的路径,用于在线,实时心律失常检测和分类
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830636
J. Gnecchi, E. R. Archundia, A. del Carmen Téllez Anguiano, A. Patiño, Daniel Lorias Espinoza
Cardiac arrhythmia detection and classification is of outmost importance for early diagnosis to reduce significantly the rates of morbidity and mortality of patients with heart disease. In particular for patients with silent cardiac symptomatology, the advances in wearable sensing technology offer a promising solution for on-line, real-time detection of intermittent tachyarrhythmia events that otherwise may evolve undetected. In this paper the authors examine some of the key issues that outline the path towards integrating various aspects for ECG signal acquisition and analysis with current trends in wearable sensing technology and present recent results towards on-line real-time arrhythmia classification considering the IoMT (Internet of Medical Things) approach.
心律失常的检测和分类对于早期诊断至关重要,可以显著降低心脏病患者的发病率和死亡率。特别是对于无症状的心脏患者,可穿戴传感技术的进步为在线、实时检测间歇性心动过速事件提供了一个有前途的解决方案,否则这些事件可能会演变为未被发现的。在本文中,作者研究了一些关键问题,这些问题概述了将ECG信号采集和分析的各个方面与可穿戴传感技术的当前趋势相结合的路径,并介绍了考虑到IoMT(医疗物联网)方法的在线实时心律失常分类的最新结果。
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引用次数: 4
Fault detection and localization applied in a fixed wing aircraft 固定翼飞机故障检测与定位
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830588
C. Morales-Morales, V. Rodriguez, M. Adam-Medina, L. Valdés
This paper presents the design of a system of faults detection and localization (its acronym FDI) based on a Piecewise Linear Observer implemented in F-16 fixed-wing aircraft under different regimes of flight: stable level wings, level turn, flight constant rising and roll. The scheme FDI based on observers that using to bank of linear observers for residues generation, switched by a switching law, dependent of time and the output of system. This piecewise linear state observer estimate the angular velocities of the aircraft. The dynamic model of the F-16 is considered as a set of linear models, linearized around of an operating point. The validation of the approach FDI is propose in simulation in conditions flight straight and level, which is one of the most important tasks of flying an aircraft while it is flying in the air.
提出了一种基于分段线性观测器的故障检测与定位系统(FDI)的设计方法,并将其应用于F-16固定翼飞机在稳定水平翼、水平转弯、飞行恒升和滚转等不同飞行状态下的故障检测与定位。该方案采用一组线性观测器进行残数生成,根据切换律切换,依赖于时间和系统输出。这个分段线性状态观测器估计飞机的角速度。F-16的动力学模型被认为是一组线性模型,围绕一个操作点线性化。在飞机在空中飞行的重要任务之一——直线飞行和水平飞行条件下,对该方法进行了仿真验证。
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引用次数: 1
Harmonic and transient state assessment in the time-domain 时域谐波与暂态评估
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830622
Ismael Molina-Moreno, A. Medina, R. Cisneros-Magaña, O. Anaya‐Lara
Power quality simulation is required to provide an evaluation of the adverse phenomena such as transients, harmonics, and voltage sags in a power system, among others. This paper details a methodology to assess adverse power quality effects. In this methodology, the power system is modeled in the continuous-time by an ordinary differential equations set. The equations set are solved through a numerical integration procedure. The methodology is applied to the modified New Zealand test power system including linear and nonlinear loads. The results are validated through a direct comparison of the state response against the actual response obtained from the time-domain power system simulation performed using the SimPowerSystems toolbox of Simulink®. The obtained results indicate that the methodology accurately estimates power quality harmonic and transient state, respectively.
电能质量仿真需要提供诸如电力系统中的瞬态、谐波和电压跌落等不良现象的评估。本文详细介绍了一种评估电能质量不利影响的方法。在该方法中,用常微分方程组在连续时间内对电力系统进行建模。通过数值积分法对方程组进行求解。将该方法应用于包括线性和非线性负荷的改进的新西兰试验电力系统。通过将状态响应与使用Simulink®的SimPowerSystems工具箱进行的时域电力系统仿真获得的实际响应进行直接比较,验证了结果。结果表明,该方法能准确地估计出电能质量的谐波和暂态。
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引用次数: 1
Features combination for gender recognition on Twitter users Twitter用户的性别识别功能组合
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830623
Daniel Fernandez, Daniela Moctezuma, O. Siordia
Gender classification in social platforms and social media has become a relevant topic for the industry because of its impact in making decision process. Gender recognition in Twitter is a business intelligence tool focused on twitter data acquisition, analysis, and process, and it can be used in many ways to transform it into valuable business intelligence data. In this paper, a method for gender recognition in Twitter users is proposed. This method employs several features related to user profile picture, screen name and profile description. This method was evaluated in a dataset with 574 users acquired from Twitter API, these users are located in Aguascalientes City at Mexico and they were manually labelled. The experimental results show an accuracy of 89.5%
由于社交平台和社交媒体中的性别分类对决策过程的影响,它已经成为行业的一个相关话题。Twitter中的性别识别是一种专注于Twitter数据获取、分析和处理的商业智能工具,可以通过多种方式将其转化为有价值的商业智能数据。本文提出了一种Twitter用户性别识别方法。该方法采用了与用户头像、屏幕名称和个人资料描述相关的几个特征。该方法在从Twitter API获取的574名用户的数据集中进行了评估,这些用户位于墨西哥阿瓜斯卡连特斯市,并被手动标记。实验结果表明,该方法的准确率为89.5%
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引用次数: 5
Nonlinear optimal control for reducing vibrations in civil structures using magnetorheological dampers 基于磁流变阻尼器的土木结构减振非线性最优控制
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830648
Joaquín Contreras-López, F. Ornelas‐Tellez, E. Espinosa-Juárez, Y. Concha-Sánchez
The frequently excessive vibrations presented in civil structures during seismic events or service conditions may result in users' discomfort, or worst, in structures failure, producing economic and life losses. This work presents the synthesis of a nonlinear optimal control scheme for compensating vibrations in civil structures by means of using magnetorheological dampers (MRD), which are used as semiactive actuator devices for damping the civil structures motion, with the inherent advantage of having a low energy consumption for operating. A three story building is analyzed as a case study, where its movement is investigated by comparing the motion time response with and without control for the MRD (located at the first building floor). Simulation results are presented to validate the effectiveness of the proposed controller for controlling the building damping via a MRD.
土木结构在地震事件或使用条件下经常出现的过度振动,可能会给使用者带来不适,甚至造成结构破坏,造成经济和生命损失。这项工作提出了一种非线性最优控制方案的综合,用于补偿土木结构中的振动,通过使用磁流变阻尼器(MRD),它被用作半主动执行器装置来阻尼土木结构的运动,具有低能耗的固有优势。本文以一栋三层建筑为例,通过比较MRD(位于第一层建筑)在控制和不控制下的运动时间响应来研究其运动。仿真结果验证了该控制器通过MRD控制建筑物阻尼的有效性。
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引用次数: 0
Financial Transmission Rights in electricity markets 电力市场中的金融传输权
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830625
C. J. Gómez-Villalobos, J. Tovar-Hernández, Ieee Member, G. Gutiérrez-Alcaraz, Pml Precio, Marginal Local Kkt, Karush-Kuhn-Tucker
Some electricity markets use Locational Marginal Prices (LMPs) to trade energy, but due to transmission lines congestion there may be volatility, existing differences between LMPs from generation points and LMPs in load points. These markets resort to the implementation of Financial Transmission Rights (FTRs) for hedging market participants against that congestion charges. In this paper, a review of FTRs implementation in electricity markets is presented, considering the nature of the problem, mathematical models for FTR auctions, simultaneous feasibility proof, and the challenge of congestion charge revenues are discussed. Also, a brief description of seven FTR markets is presented enlightening important concerns about them.
一些电力市场使用位置边际价格(LMPs)进行能源交易,但由于输电线路拥堵,可能存在波动,发电点的LMPs与负荷点的LMPs之间存在差异。这些市场诉诸于实施金融传输权(ftr)来对冲市场参与者对拥堵费的影响。本文回顾了FTR在电力市场中的实施,考虑到问题的性质,讨论了FTR拍卖的数学模型,同时可行性证明以及拥堵费收入的挑战。此外,对七个FTR市场进行了简要描述,说明了对它们的重要关注。
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引用次数: 0
VHDL code generation as State Machine from a Data Flow Graph 从数据流图生成状态机的VHDL代码
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830518
Darian Reyes Fernández de Bulnes, Y. Maldonado
Operation scheduling is a fundamental problem in mapping an application to electronic devices. In scenarios where these schedules are made on Data Flow Graph (DFG), it is necessary to convert the result to Hardware Description Language (HDL) code. We present a detailed approach for generate VHDL code described in a Data Flow Graph (DFG). We generate VHDL code corresponding to Moore Finite State Machine (FSM), because is similar with the logic of the DFG. We use 20 DFGs from benchmark Mediabench to compute different experiments and we report the occupied area (Slice registers and LUTs) of VHDL codes on a FPGA device. We expose conversions made from DFG scheduling and mapping with As Soon As Possible (ASAP), As Late As Possible (ALAP) and Random scheduling algorithms. All codes are simulated with Xilinx ISE Design Suite to demonstrate its validity.
操作调度是将应用程序映射到电子设备的一个基本问题。在数据流图(DFG)上进行这些调度的场景中,有必要将结果转换为硬件描述语言(HDL)代码。我们提出了一种生成数据流图(DFG)中描述的VHDL代码的详细方法。我们生成了与Moore有限状态机(FSM)对应的VHDL代码,因为它与DFG的逻辑相似。我们使用来自mediabbench基准测试的20个DFGs来计算不同的实验,并报告了FPGA设备上VHDL代码的占用面积(Slice寄存器和lut)。我们公开了使用尽快(ASAP)、尽可能晚(ALAP)和随机调度算法从DFG调度和映射进行的转换。所有代码都在赛灵思ISE设计套件中进行了模拟,以证明其有效性。
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引用次数: 1
Model of thrust/Load-Torque in terms of geometric parameters of the blade for design and simulation of small scale propellers used in miniature UAVs 基于叶片几何参数的小型无人机螺旋桨设计与仿真推力/载荷-扭矩模型
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830585
F. Ruiz-Sánchez
Autonomous flight of miniature UAVs demands high performance actuators satisfying the requirements of modern control algorithms. Specially for quadrotors, where lift and control forces are the result of a synchronized action of the four BLDC/propeller actuators, the form of their propellers are fundamental to attain a fast and reliable dynamic response. In this paper, we present a mathematical model of the thrust and the Load-Torque produced by a small scale propeller used in miniature quadrotors in terms of the geometric properties of the blade assuming an operation in hover mode. This model is intended to provide a useful expression for simulation analysis with design purposes. The model is based on the Blade Element Theory and the Euler equation for fluids, and describes the Lift on a thin and curved airfoil with a known angle of attack, as the normal acceleration between the deflected streamlines of an incompressible fluid. This allows the calculation of the thrust and the Load-Torque of a turning propeller in terms of the geometric parameters of its blades, i.e. radial and cross section length, curvature and angle of attack, but preserving the conventional results relating the thrust to a square function of the rotational speed of the propeller. As a reference, we include the conventional model based on experimental coefficients of Lift and Drag before introducing our approach, and then, we illustrate the advantage of our approach with an example based on a propeller with blades of fixed and constant pitch angle and constant width, and finally, we briefly discuss about the evidence, based on experimental and simulation data obtained in the literature, that validates our approach.
微型无人机的自主飞行要求高性能的执行器满足现代控制算法的要求。特别是对于四旋翼机,其中升力和控制力是四个BLDC/螺旋桨执行器同步作用的结果,其螺旋桨的形式是实现快速可靠的动态响应的基础。本文根据旋翼在悬停状态下的几何特性,建立了小型四旋翼螺旋桨推力和载荷-扭矩的数学模型。该模型旨在为具有设计目的的仿真分析提供一个有用的表达式。该模型基于叶片单元理论和流体的欧拉方程,描述了具有已知迎角的薄弯曲翼型上的升力,作为不可压缩流体的偏转流线之间的法向加速度。这允许根据叶片的几何参数(即径向和横截面长度、曲率和迎角)计算旋转螺旋桨的推力和负载-扭矩,但保留了将推力与螺旋桨转速的平方函数相关的传统结果。首先介绍了基于升力和阻力实验系数的传统模型作为参考,然后以定、定桨角、定宽桨叶为例说明了该方法的优越性,最后根据文献中的实验和仿真数据简要讨论了该方法的有效性。
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引用次数: 1
Switching based modeling of grid interconnected hysteresis current controlled VSC converters 基于开关的电网互联迟滞电流控制VSC变换器建模
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830589
M. Esparza, J. Segundo-Ramírez
VSC based converters are among the most preferred interfaces to perform the interconnection, especially for integration of distributed energy sources, active filtering, and power supply applications. Hysteresis current control presents very attractive characteristics for these applications such as: robust control, fast dynamical response, built-in over-current protection and simple and reliable implementation. However, its highly nonlinear nature have been represented a challenge for the proposal of mathematical models to perform analysis and design tasks. This paper proposes a novel modeling approach based on the accurate calculation of the switching times for time and frequency analyses for grid interconnected hysteresis current controlled VSC converters. From this proposal, analytic formulations in the time domain and frequency domain of the harmonics generated by the controller are drawn. These can be useful to develop analysis and practical design methodologies based on numerical methods.
基于VSC的转换器是执行互连的最优选接口之一,特别是对于分布式能源,有源滤波和电源应用的集成。迟滞电流控制具有控制鲁棒、动态响应快、内置过流保护、实现简单可靠等特点。然而,它的高度非线性性质对数学模型的提出提出了挑战,以执行分析和设计任务。本文提出了一种基于开关次数精确计算的新型建模方法,用于电网互联迟滞电流控制变频变换器的时频分析。在此基础上,给出了控制器产生的谐波在时域和频域的解析表达式。这些可以用于开发基于数值方法的分析和实际设计方法。
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引用次数: 1
Improved P&O algorithm for distributed MPPT PV configurations 分布式MPPT PV配置的改进P&O算法
Pub Date : 2016-11-01 DOI: 10.1109/ROPEC.2016.7830635
V. M. Tovar-Olvera, A. Loredo-Flores, E. Bárcenas
The photovoltaic (PV) power generation systems have a variable efficiency due to mismatching conditions, such as a partial shading condition. To compensate this situation, the Maximum Power Point Tracking (MPPT) systems are used to search the operating point that results in a maximum power extraction from the PV system. Thus, the present paper proposes and analyses an alternative to the well-known MPPT algorithm Perturb & Observe (P&O), which is based on the bisection numerical method. In this way, the efficiency and tracking speed of the modified P&O can be greatly improved as illustrated in the numerical evaluation presented in this paper.
由于不匹配条件,例如部分遮阳条件,光伏(PV)发电系统具有可变的效率。为了补偿这种情况,使用最大功率点跟踪(MPPT)系统来搜索导致光伏系统最大功率提取的工作点。因此,本文提出并分析了一种替代著名的基于二分法的扰动与观测(P&O)算法。这样可以大大提高改进后的P&O的效率和跟踪速度,如本文给出的数值评价所示。
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引用次数: 5
期刊
2016 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)
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