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Comparison of vector control of two-phase induction motor using continuous and discontinuous SVPWM in terms of switching losses investigations 基于开关损耗研究的连续和间断SVPWM矢量控制两相异步电动机的比较
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075765
Rungwicha Chaiyot, V. Kinnares, S. Kittiratsatcha
Vector control of unsymmetrical two-phase induction motor (TPIM) drives is attractive to researchers. Several methods have been proposed for improved TPIM drives such as V/Hz control, scalar control, direct torque control and vector control. However, a switching loss problem is serious in high switching frequency applications. The system efficiency can be improved by reducing switching losses. This paper proposes two types of modulation methods namely time-based continuous space vector PWM and time-based discontinuous space vector PWM for comparing switching losses in vector controlled two-phase induction motor drives. The dynamic performance and total harmonic current distortion are discussed. Simulation results illustrate the satisfied performance of the proposed motor drive system. The control system is implemented on Matlab-Simulink. The simulation results show that the discontinuous time-based space vector PWM gives lower total loss, lower switching loss and lower total harmonic current distortion than the time-based continuous space vector PWM.
非对称两相感应电动机(TPIM)的矢量控制一直是研究人员关注的问题。提出了几种改进TPIM驱动器的方法,如V/Hz控制、标量控制、直接转矩控制和矢量控制。然而,在高开关频率的应用中,开关损耗问题很严重。通过减少开关损耗可以提高系统效率。本文提出了基于时间的连续空间矢量PWM和基于时间的不连续空间矢量PWM两种调制方法来比较矢量控制的两相异步电动机驱动的开关损耗。讨论了其动态性能和总谐波电流畸变。仿真结果表明,所提出的电机驱动系统具有良好的性能。控制系统在Matlab-Simulink上实现。仿真结果表明,与基于时间的连续空间矢量PWM相比,基于时间的间断空间矢量PWM具有更低的总损耗、更低的开关损耗和更小的总谐波电流畸变。
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引用次数: 1
Search algorithm of write voltage optimization in NAND flash memory NAND闪存写入电压优化的搜索算法
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075860
Chatuporn Duangthong, W. Phakphisut, P. Supnithi
In NAND flash memory, the major problem is voltage immigration which is the result of program and erase (PE) cycling number and data retention time. Although previous works study the write voltage optimization for NAND flash memory, the write voltage optimization of multilevel coding (MLC) and bit-interleaved coded modulation (BICM) structure have not been focused, therefore, in this work, we propose the search algorithm of write voltage optimization for MLC and BICM structure. The search algorithm can reduce the number of possible write voltages and provides the optimal write voltage for each PE cycling number. The bit-error rate (BER) performance of optimized write voltage is lower than the fixed write voltage in BICM structure. Moreover, the proposed optimization technique provides the most significant bit (MSB) and least significant bit (LSB) of MLC structure with identical BER performances.
在NAND闪存中,主要的问题是电压迁移,这是程序和擦除(PE)循环次数和数据保留时间的结果。虽然以往的工作研究了NAND闪存的写电压优化,但对多电平编码(MLC)和比特交织编码调制(BICM)结构的写电压优化并没有关注,因此,在本工作中,我们提出了MLC和BICM结构的写电压优化搜索算法。该搜索算法可以减少可能的写电压数,并为每个PE循环数提供最优的写电压。在BICM结构中,优化后的写电压的误码率(BER)性能低于固定的写电压。此外,该优化技术提供了具有相同误码率性能的MLC结构的最高有效位(MSB)和最低有效位(LSB)。
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引用次数: 1
A temperature-insensitive instrumentation amplifier using CCTA-based voltage to current converter 基于ccta的电压电流变换器的温度不敏感仪表放大器
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075908
M. Siripruchyanun, Kangwal Payakkakul
This article describes an instrumentation amplifier (IA), which is temperature-insensitive using principle of voltage to current converter based on current conveyor transconductance amplifier (CCTA). It comprises 2 CCTAs and 3 resistors. The voltage gain can be electronically adjusted via input bias current of the CCTA and/or resistor. Additionally, the presented circuit behavior is ideally temperature-insensitive, suitable to apply in a temperature control/measurement work. The PSpice simulation results insist that the proposed IA offers power consumption of 1.16mW at ±1.5V power supplies. Performances of the proposed circuit are investigated, they are in accordant to theoretical expectations.
介绍了一种基于电流传送带跨导放大器(CCTA)的电压电流变换器原理的温度不敏感仪表放大器(IA)。它由2个ccta和3个电阻组成。电压增益可以通过CCTA和/或电阻的输入偏置电流进行电子调节。此外,所提出的电路行为是理想的温度不敏感,适用于温度控制/测量工作。PSpice仿真结果表明,所提出的IA在±1.5V电源下的功耗为1.16mW。对所提电路的性能进行了研究,其性能符合理论预期。
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引用次数: 2
A universal microcontroller circuit and firmware design and implementation for IoT-based realtime measurement and control applications 通用微控制器电路和固件设计和实现,用于基于物联网的实时测量和控制应用
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075906
S. Nuratch
This paper presents a design and implementation techniques to construct a universal microcontroller board based on realtime measurement and control applications. It is not only designed for realtime applications, but is also designed for supporting many modern WiFi devices that utilize TCP/IP protocol over internet networks. It means the proposed system fully supports many Internet-of-Things (IoT) applications. Furthermore, it can also be used for computer based monitoring and control applications and many other industrial applications, including Industrial Internet-of-Things (IIoTs) as well. In addition, the universal microcontroller board is designed for flexibility of use, meaning the users can custom the board to reduce and expand their applications. The system is composed of all necessary components including analog and digital input/output ports, WiFi communication based on TCP/IP. The realtime operating system (RTOS) and communication protocol drivers, e.g., UART, I2C, and SPI, are also embedded in the microcontroller firmware. The system is evaluated and examined in web-based realtime monitoring to prove that it can be used in IoT based realtime applications. The experimental results show that the proposed system appropriately exchanges data over internet networks to web-browser with high speed data transfer rate as expected.
本文介绍了一种基于实时测控应用的通用微控制器板的设计和实现技术。它不仅是为实时应用而设计的,而且也是为支持许多现代WiFi设备而设计的,这些设备在互联网网络上利用TCP/IP协议。这意味着拟议的系统完全支持许多物联网(IoT)应用。此外,它还可用于基于计算机的监视和控制应用以及许多其他工业应用,包括工业物联网(iiot)。此外,通用微控制器板的设计灵活使用,这意味着用户可以定制板,以减少和扩大他们的应用。系统由模拟和数字输入/输出端口、基于TCP/IP的WiFi通信等组成。实时操作系统(RTOS)和通信协议驱动程序,如UART, I2C和SPI,也嵌入在微控制器固件中。该系统在基于web的实时监控中进行了评估和测试,以证明它可以用于基于物联网的实时应用。实验结果表明,该系统能够很好地将internet网络上的数据交换到web浏览器上,并具有较高的数据传输速率。
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引用次数: 9
Polarimetric RCS signature of canonical target in dense grass area using GB-SAR environment 基于GB-SAR环境的茂密草丛典型目标偏振RCS特征
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075824
N. Phruksahiran
Applications for radar systems are continuously being developed, particularly in the remote sensing and positioning of searched objects in disaster and forest areas. In this paper, the concept of radar cross section (RCS) measurements for acquiring and identifying the polarimetric backscatter characteristics of canonical targets is presented. This concept is achieved with the principle of using ground-based synthetic aperture radar (GB-SAR) and the change in the relative angle between the radar system and target position in a dense grass environment. Experimental results are presented that demonstrate that the structures of canonical targets react differently to the incident wave, polarization and particularly to the relative angle change such that the measured polarimetric backscatter characteristics can be used to indicate the existence of a specific object in a cluttered area and to predict the geometries and structures of canonical targets. The measurement concept is also shown to be capable of indicating the existence of a specific target structure by using the appropriate polarization state. Furthermore, this concept can be applied in search and rescue applications in cluttered areas.
雷达系统的应用正在不断发展,特别是在灾害和森林地区的遥感和搜索目标定位方面。本文提出了用于获取和识别典型目标偏振后向散射特性的雷达截面测量的概念。这一概念是利用地面合成孔径雷达(GB-SAR)的原理,利用茂密草丛环境中雷达系统与目标位置相对角度的变化来实现的。实验结果表明,典型目标的结构对入射波、偏振,特别是相对角度变化的反应是不同的,因此测量的偏振后向散射特性可以用来指示杂波区域中特定目标的存在,并预测典型目标的几何形状和结构。该测量概念还表明,可以通过使用适当的偏振态来指示特定目标结构的存在。此外,这一概念可以应用于混乱地区的搜索和救援应用。
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引用次数: 0
In vivo estimation of the head tissue conductivities by electrical impedance tomography technique and positivity constraint 用电阻抗断层扫描技术和正性约束在体内估计头部组织电导率
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075867
Taweechai Ouypornkochagorn
Reported head tissue conductivities to date are usually obtained from sample investigation in situ or in vitro. However, there are many issues to concern e.g. sample selection and preparation or the deterioration of physiological property over time. In vivo estimation is recently used to estimate based on certain techniques. Electrical impedance tomography (EIT) is a mentioned technique, however regarding the susceptibility to noise of EIT, the estimation often results unexpected outcome. The estimated conductivity values may be inaccurate and/or be negative. The number of tissues in the estimation is then usually not over two. In this work, positivity constraint was employed to restrain the estimate to be only positive. Simulation result shows that the employment of the constraint can improve estimation accuracy and robustness to noise and also modeling error. Simultaneous estimation for all five main tissues is possible as well, even though the estimation of the cerebrospinal fluid conductivity is still not accurate.
迄今为止报道的头部组织电导率通常是通过原位或体外样本调查获得的。然而,有许多问题需要关注,例如样品的选择和制备或生理特性随时间的恶化。体内估计是近年来基于某些技术进行估计的一种方法。电阻抗层析成像(EIT)是一种被提及的技术,但由于电阻抗层析成像对噪声的敏感性,其估计往往会产生意想不到的结果。估计的电导率值可能不准确和/或为负值。估计中的组织数量通常不超过2个。在这项工作中,采用正约束来约束估计仅为正。仿真结果表明,该约束可以提高估计精度和对噪声的鲁棒性,降低建模误差。同时估计所有五种主要组织也是可能的,即使对脑脊液电导率的估计仍然不准确。
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引用次数: 0
Optimal PID parametric auto-adjustment for BLDC motor control systems based on artificial intelligence 基于人工智能的无刷直流电机控制系统最优PID参数自整定
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075892
Jirapun Pongfai, W. Assawinchaichote
This paper considers the comparison performance and effectiveness of the PID controller auto-tuning for brushless DC motor (BLDC motor) by applying artificial intelligence (AI) algorithm and the classical method of PID parameters tuning. Neural network algorithm (NN) and genetic algorithm (GA) are among the well-known artificial intelligences algorithm existing todays while the classical method is Ziglor-Nichol method (ZN). To compare the performances of the controller, the convergence rate and the transient response analysis is examined by considering a criterial evaluated performance of the overshoot, the steady state error and the rise time. From the BLDC motor simulation results, it is found that the NN has given the better transient response than the GA and the ZN when evaluated in the convergence rate and the transient response analysis.
本文研究了应用人工智能算法与经典PID参数整定方法对无刷直流电动机(BLDC motor)进行PID控制器自整定的性能和有效性比较。神经网络算法(Neural network algorithm, NN)和遗传算法(genetic algorithm, GA)是目前较为知名的人工智能算法,其中经典的方法是Ziglor-Nichol方法(Ziglor-Nichol method, ZN)。为了比较控制器的性能,通过考虑超调量、稳态误差和上升时间的判据来检验控制器的收敛速度和暂态响应分析。从无刷直流电机的仿真结果来看,在收敛速度和暂态响应分析方面,神经网络比遗传算法和遗传算法具有更好的暂态响应。
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引用次数: 9
Impact of sensor mobility on UAV-based smart farm communications 传感器移动性对基于无人机的智能农场通信的影响
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075822
Prusayon Nintanavongsa, Itarun Pitimon
Agricultural productivity has long been a key metric for measuring farming efficiency and it has been proven that agricultural productivity can be increased through smart farming. Recently, Unmanned Aerial Vehicle (UAV) has also been incorporated into smart farming in order to provide additional perspectives, i.e., imagery analysis and agricultural surveillance. These UAVs not only perform their specific tasks but also capable of communicating. We investigate the impact of sensor mobility on network communications in a smart farm platform, comprising of sensor-equipped UAVs. Through a simulation study, we demonstrate how sensor mobility impacts network throughput and delay as well as determine the optimal UAV mobility profile.
长期以来,农业生产率一直是衡量农业效率的关键指标,事实证明,智能农业可以提高农业生产率。最近,无人机(UAV)也被纳入智能农业,以提供额外的视角,即图像分析和农业监控。这些无人机不仅可以执行特定任务,还可以进行通信。我们研究了传感器移动性对智能农场平台中网络通信的影响,该平台由配备传感器的无人机组成。通过仿真研究,我们展示了传感器移动性如何影响网络吞吐量和延迟,以及确定最佳的无人机移动性轮廓。
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引用次数: 11
Scoliosis screening using depth camera 使用深度摄像机进行脊柱侧凸筛查
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075869
Siraprapa Tanee, D. Thanapatay
Scoliosis is a three-dimensional deformity of the spine that occur a deviation from the normal axis. An early detection and treatment are necessary for increasing an efficiency of correction and reducing an effect. There are many primary screening methods such as the body shape measurement. This paper suggests a screening method by using Kinect camera that can collect the point of joints of a human body. Those points are used to calculate for finding values that can define the balance of the body. Those values are shoulder asymmetric, shoulder length difference, shoulder angle difference, waist asymmetric, waist length difference, waist angle difference, the angle between shoulder and reference line, the angle between waist and reference line and the angle between the shoulder and waist line.
脊柱侧凸是脊柱的三维畸形,发生偏离正常轴。早期发现和治疗是提高矫治效率和减少不良影响的必要条件。主要的筛查方法有很多,比如体型测量。本文提出了一种利用Kinect摄像头采集人体关节点的筛选方法。这些点被用来计算找到可以定义身体平衡的值。这些值分别是肩不对称、肩长差、肩角差、腰不对称、腰长差、腰角差、肩与参考线的夹角、腰与参考线的夹角、肩与腰线的夹角。
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引用次数: 3
Automate of capacitor placement in microgrid system under EVs load penetration 电动汽车负载渗透条件下微电网电容器安装自动化
Pub Date : 2017-03-01 DOI: 10.1109/IEECON.2017.8075767
Y. Kongjeen, Krittidet Buayai
This paper presents the automate of capacitor placement in micro grid system under EVs load penetration. The proposed 26 bus micro grid distribution system is selected for simulating the performance of EVs load including charging station. The comparison between RLF and HIMPL method is also proposed in this paper. The simulation results showed that the optimal capacitor placement when varied EVs load penetration level, the RLF method can be found optimal position under incomprehensive for sizing capacitor. Meanwhile, The HIMPL method can be also given the optimal position as the RLF method by using selection of optimal capacitor sizing. The optimal position and optimal sizing of capacitor are bus No.14, capacitor size 7,500 kVar, respectively. Therefore, this study can be verified the selection of capacitor sizing for placement in microgrid system when EVs load and charging station are installed.
本文研究了电动汽车负荷渗透下微网系统中电容器的自动化布置问题。选择所设计的26总线微电网配电系统,模拟包括充电站在内的电动汽车负载的性能。本文还对RLF法和HIMPL法进行了比较。仿真结果表明,当电动汽车负载渗透水平不同时,RLF方法可以在不全面的情况下找到电容器尺寸的最优位置。同时,HIMPL方法也可以像RLF方法一样,通过选择最优电容尺寸来给出最优位置。电容器的最佳位置和最佳尺寸分别为14号母线,电容器尺寸为7500 kVar。因此,本研究可以验证安装电动汽车负载和充电站时微电网系统中电容器尺寸的选择。
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引用次数: 3
期刊
2017 International Electrical Engineering Congress (iEECON)
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