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2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)最新文献

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24 GHz Dielectric Resonator Antenna for MMW Automotive Radar 毫米波汽车雷达用24ghz介电谐振器天线
Wenzhe Liu, Boyuan Ma, J. Pan
A cylindrical dielectric resonator antenna (CDRA) is proposed for millimeter wave (MMW) automotive radar (AR) systems. The antenna has moderate gain and beamwidth, good cross-polarization (XP) suppression, relative wide bandwidth, and another adjacent potential band. The antenna operates at 24 GHz, leading to very small size. In order to meet the requirements of fixation and alignment, an extra fixture is co-fabricated with the substrate made of the same material. The effect of the fixture on the dielectric resonator antenna is investigated by simulation. It is found that with the fixture, which has much shorter height and lower permittivity, the dielectric resonator stays almost unchanged in terms of resonant mode, resonant frequency, Q factor, and internal field. The antenna has a gain of 6 dB, a XP suppression of more than 40 dB, and a bandwidth of 22.6% at 24 GHz.
提出了一种用于毫米波汽车雷达(AR)系统的圆柱形介质谐振器天线(CDRA)。该天线具有中等增益和波束宽度,良好的交叉极化(XP)抑制,相对宽的带宽和另一个相邻的电位带。天线的工作频率为24ghz,因此尺寸非常小。为了满足固定和对准的要求,用相同材料制成的基材与额外的夹具共同制造。通过仿真研究了夹具对介质谐振器天线的影响。结果表明,采用高度较短、介电常数较低的夹具,介质谐振腔的谐振模式、谐振频率、Q因子和内场基本保持不变。该天线增益为6 dB, XP抑制超过40 dB,在24 GHz时带宽为22.6%。
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引用次数: 0
Analysis and Research on Power Flow Entropy Index of Power System 电力系统潮流熵指标的分析与研究
S. Zhang, Yongxiang Li, Tao Jin, Hua Yu, Gang Yang, Zhixiang Liu
In order to meet the optimization of power distribution throughout the country, China will build an UHV AC/DC hybrid power grid with UHV AC and DC backbone grids and coordinated development of power grids at all levels. This paper is based on the characteristics of the complex system of power system, and the entropy theory is applicable to analyze the nature of the orderliness of complex systems. The entropy index is applied to the evaluation system of power system operation status, and the existing entropy index is summarized and analyzed. The weighted power flow entropy weighted by the regional average load rate corrected by the mean squared coefficient is used as the mathematical representation of the self-organized criticality of the power system. Finally, a comparative analysis of the example results shows that the index can accurately and effectively reflect the degree of order distribution of the system power flow.
为实现全国配电优化,中国将建设特高压交直流主干网和各级电网协调发展的特高压交直流混合电网。本文从电力系统复杂系统的特点出发,运用熵理论分析复杂系统的有序性本质。将熵指标应用于电力系统运行状态评价体系,对现有的熵指标进行了总结和分析。采用区域平均负荷率经均方系数修正后的加权潮流熵作为电力系统自组织临界的数学表示。最后,对算例结果进行了对比分析,结果表明该指标能够准确有效地反映系统潮流的有序分布程度。
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引用次数: 3
Parametric Modeling of Geometric Errors for CNC Machine Tools Based on Chebyshev Polynomial 基于切比雪夫多项式的数控机床几何误差参数化建模
Jianfeng Lin, Yanqiang Zhang, Xuxu Zhang, Weiwei Li, Weiqing Lin
In order to establish the mathematical model of rotary axes geometric error of machine tool quickly and accurately, a parameterized modeling method based on Chebyshev polynomial is proposed in this paper. First, the rotation angle of the rotation axis of the machine tool is converted into a Chebyshev variable, and then the Chebyshev variable is substituted into Chebyshev polynomials of different orders. Second, The corresponding coefficients are obtained by multiple linear regression based on Chebyshev basis function values and Chebyshev variables. Finally, the transformation relationship between the rotation angle of the rotation axis and the Chebyshev variable is substituted into the mathematical model of the basic geometric error term. Compared to other methods, the modeling process is simple and easy to program. This paper takes the two rotary axes of VMC65m as an example to obtain the geometric error distribution of the working space of the machine tool, which provides a theoretical basis for the design and error compensation of the machine tool.
为了快速准确地建立机床旋转轴几何误差的数学模型,提出了一种基于切比雪夫多项式的参数化建模方法。首先将机床旋转轴的旋转角度转换为切比雪夫变量,然后将切比雪夫变量代入不同阶次的切比雪夫多项式。其次,根据Chebyshev基函数值和Chebyshev变量,通过多元线性回归得到相应的系数。最后,将旋转轴转角与切比雪夫变量之间的变换关系代入基本几何误差项的数学模型中。与其他方法相比,建模过程简单,易于编程。本文以VMC65m的两个转轴为例,得到机床工作空间的几何误差分布,为机床的设计和误差补偿提供理论依据。
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引用次数: 1
Applying Spoof Surface Plasmons to Non-destructive Testing 欺骗表面等离子体在无损检测中的应用
Zipeng Xie, Liguo Sun, Fang Wu, Yongjie Li, Rui Cao
Void defects in composite materials have negative effects on their strength and reliability. In this paper, based on spoof surface plasmons (SSPs) technology, a new microwave detector with high sensitivity is proposed for non-destructive testing of non-conductive composite materials, which are simplified as dielectrics. Firstly, spoof surface plasmon polaritons (SSPPs) are studied to detect void defects, such as blind holes in dielectrics. According to simulation, the change of defect size, such as radius of blind hole, could affect cutoff frequency of the surface wave. It is also verified that this detecting method is effective but the variation of cutoff frequency is not sensitive enough to measure and qualify. Therefore, for improvement, a new structure using SSPPs to excite spoof localized surface plasmons (spoof- LSPs) is presented to detect void defects in dielectric material. Since the coupling between SSPPs and spoof-LSPs is very strong, the resonant frequency of spoof-LSPs is shifted and the magnitude of the scattering parameter S21 is varied significantly in specific frequency when the size of defect is changed. High sensitivities are validated in both simulation and measurement.
复合材料中的空洞缺陷对复合材料的强度和可靠性有不利影响。本文基于欺骗表面等离子体(ssp)技术,提出了一种新型的高灵敏度微波探测器,用于将非导电复合材料简化为电介质的无损检测。首先,研究了欺骗表面等离子体激元(SSPPs)用于检测介质中的空洞缺陷,如盲孔。仿真结果表明,盲孔半径等缺陷尺寸的变化会影响表面波的截止频率。验证了该检测方法的有效性,但截止频率的变化不够灵敏,无法测量和鉴定。为此,本文提出了一种利用SSPPs激发欺骗局域表面等离子体(spoof- LSPs)来检测介电材料中的空洞缺陷的新结构。由于SSPPs与欺骗- lsps之间的耦合非常强,当缺陷尺寸改变时,欺骗- lsps的谐振频率发生偏移,散射参数S21的幅度在特定频率上发生显著变化。仿真和测量结果验证了该方法的高灵敏度。
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引用次数: 3
Dual-Band Band-Stop Filter Design Based on Single Defected Microstrip Structure 基于单缺陷微带结构的双带带阻滤波器设计
D. La, Jun Xu, Jing-Wei Guo, Bu-Ying Zhang, S. Jia
In this paper, a novel curved line shape defected microstip structure (DMS) is proposed. The resonant frequencies of the proposed curved line shape DMS is simulated by using HFSS and can be adjusted by changing the length a. A miniaturized dual-band band-stop filter is presented by using the cascade structure of the proposed curved line shape DMSs. The total circuit is small. The simulation results of the proposed band-stop filter are obtained through HFSS. There are three reflection zeros located at about 4.08 GHz, 5.26GHz and 6.2 GHz, which can improve the band-stop filter's sharp rejection. The measurement results are consistent with simulation ones.
提出了一种新型的曲线形状缺陷微针结构(DMS)。利用HFSS对所提出的曲线型DMS谐振频率进行仿真,并通过改变长度a来调整谐振频率。利用所提出的曲线型DMS的级联结构,提出了一种小型化的双带阻滤波器。整个电路很小。通过HFSS仿真得到了该带阻滤波器的仿真结果。在4.08 GHz、5.26GHz和6.2 GHz处设置了三个反射零点,提高了带阻滤波器的锐利抑制能力。测量结果与仿真结果吻合较好。
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引用次数: 3
A Unified Root Algorithm in Bignum Arithmetic Bignum算法中的统一根算法
Yiping Cheng, Guizhi Cheng
In bignum arithmetic, the cube root and higherorder root operations are conventionally treated as elementary functions, meaning that for them, correct rounding is not required, usually even without an error bound. In this paper we provide a unified algorithm RootRem to find the (arbitrary-ordered) root of bignums. This algorithm first finds the reciprocal root by using Newton iteration, and then obtains the root through a reciprocal operation. It has guaranteed correct rounding in all cases. RootRem(2), which is to find the square root, is currently found to be less efficient than the existing algorithm SqrtRem proposed by Brent and Zimmermann. However, RootRem(p) with $pgeq 3$ fill an important theoretical gap and are major improvements over the existing algorithms.
在大位数算术中,立方根和高阶根运算通常被视为初等函数,这意味着对它们来说,不需要正确的舍入,甚至通常没有误差界。本文给出了一种统一的求二进制数(任意序)根的算法RootRem。该算法首先采用牛顿迭代法求倒数根,然后通过倒数运算求根。它保证了在所有情况下的正确舍入。RootRem(2)是求平方根的算法,目前发现其效率低于Brent和Zimmermann提出的现有算法SqrtRem。然而,$pgeq 3$的RootRem(p)填补了一个重要的理论空白,是对现有算法的重大改进。
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引用次数: 0
Wind Turbine Condition Monitoring based on SCADA Data Analysis 基于SCADA数据分析的风力机状态监测
Haolin Yin, Rong Jia, Fuqi Ma, Dameng Wang
There is a correlation between two parameters in the data collected by the SCADA system of wind turbine. In this paper, SCADA parameters were related to each subsystem, and their correlations can be found according to the principle of wind turbine operation. The Polynomial Regression was used to establish normal relations matrix between two parameters in different wind speed. The distance between undetermined SCADA data relationship matrix and normal SCADA data relationship matrix was treated as the evaluation criteria. Based on SCADA data collected before a failure occurs of two wind turbine located in a wind farm of Zhangbei County, MATLAB was used to verify the validity of this method. The result confirmed that this method can reflect faults two months ahead of the SCADA system.
风力机SCADA系统采集的数据中,两个参数之间存在相关性。本文将SCADA参数与各子系统相关联,根据风力机的运行原理找到它们之间的关联关系。采用多项式回归建立了两个参数在不同风速下的正态关系矩阵。以未确定的SCADA数据关系矩阵与正常SCADA数据关系矩阵之间的距离作为评价标准。基于张北县某风电场两台风机故障前采集的SCADA数据,利用MATLAB验证了该方法的有效性。结果表明,该方法可以比SCADA系统提前两个月反映故障。
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引用次数: 6
Design of Testing System for Automotive Power Electronic Unit Based on Energy-Consuming Platform 基于能耗平台的汽车电力电子单元测试系统设计
Xiangwen Fan, M. Fang, Yongyi He, Pengfei Cheng
For qualifying the reliability and enhancing the performance of automotive power electronic unit (PEU), a testing system based on energy-consuming platform is developed, which adopts advanced sensing and automatic control technologies to simulate the real working environment of PEU. The system mainly includes high and low voltage energy supply units, electronic load unit, dummy load units, hydraulic water cooling unit, test console unit, temperature control unit and main control unit, and experiments are implemented on the system for PEU products. Meanwhile, system capability index CGK and GR&R are 1.912 and 2.74% separately calculated by measurement system analysis (MSA) method used data obtained from a large number of tests, which indicates that the accuracy, stability and repeatability of testing system are excellent. All analysis results demonstrate that the system meets the performance indicator requirement of testing, and can provide accurate test data for the development of PEU.
为了验证汽车动力电子单元(PEU)的可靠性,提高其性能,采用先进的传感和自动控制技术,开发了一种基于能耗平台的测试系统,模拟了汽车动力电子单元的真实工作环境。该系统主要包括高低压供电单元、电子负载单元、虚拟负载单元、液压水冷却单元、试验台单元、温控单元和主控单元,并对PEU产品进行了系统实验。同时,利用大量试验数据,采用测量系统分析(MSA)方法计算得到的系统能力指标CGK和GR&R分别为1.912和2.74%,表明测试系统具有良好的准确性、稳定性和重复性。分析结果表明,该系统满足测试的性能指标要求,可为PEU的研制提供准确的测试数据。
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引用次数: 0
Short-term Forecasting of PV Power Based on the Fuzzy Clustering Algorithm and Support Vector Machine in Smart Distribution Planning 智能配电规划中基于模糊聚类和支持向量机的光伏发电短期预测
Li Shan, Xin Pei-zhe, Z. Guohui
This paper presents a photovoltaic (PV) short-term power prediction method based on fuzzy clustering and support vector machines. Using the meteorological information to establish a fuzzy similarity matrix, a set of historical day sample sets most similar to the forecast day is obtained through classification recognition, and the meteorological factors of the prediction date are used as input samples of the prediction model. Thus, the PV power generation prediction model was established. According to the actual measure data, the proposed model is verified. The results show that the method has high prediction accuracy and has better reference value for PV power generation prediction.
提出了一种基于模糊聚类和支持向量机的光伏发电短期功率预测方法。利用气象信息建立模糊相似矩阵,通过分类识别得到一组与预报日最相似的历史日样本集,并将预报日的气象因子作为预测模型的输入样本。据此,建立了光伏发电预测模型。根据实际测量数据,对所提模型进行了验证。结果表明,该方法具有较高的预测精度,对光伏发电预测具有较好的参考价值。
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引用次数: 0
Space Information Support Warfare Model Based on Metcalf-Lanchester‘s Equation 基于Metcalf-Lanchester方程的空间信息保障战模型
Xiangyu Liu, Haiyang Jiang, H. Zhao, Hai-tao Yang
In order to effectively estimate the influence of space information support to operation progress, improve the Lanchester combat equation and establish Metcalf-Lanchester combat model under the space information support. Through the improvement of space information support equipment, developping different support plan, then carry out simulation and analyze the impact of different equipment on operation results. The result of simulation illustrate that the model can reflect the influence of space information support.
为了有效评估空间信息保障对作战进度的影响,改进了兰彻斯特作战方程,建立了空间信息保障下的梅特卡夫-兰彻斯特作战模型。通过对空间信息保障装备的改进,制定不同的保障方案,然后进行仿真分析不同装备对作战结果的影响。仿真结果表明,该模型能较好地反映空间信息支持的影响。
{"title":"Space Information Support Warfare Model Based on Metcalf-Lanchester‘s Equation","authors":"Xiangyu Liu, Haiyang Jiang, H. Zhao, Hai-tao Yang","doi":"10.1109/IAEAC.2018.8577258","DOIUrl":"https://doi.org/10.1109/IAEAC.2018.8577258","url":null,"abstract":"In order to effectively estimate the influence of space information support to operation progress, improve the Lanchester combat equation and establish Metcalf-Lanchester combat model under the space information support. Through the improvement of space information support equipment, developping different support plan, then carry out simulation and analyze the impact of different equipment on operation results. The result of simulation illustrate that the model can reflect the influence of space information support.","PeriodicalId":6573,"journal":{"name":"2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)","volume":"31 1","pages":"2339-2344"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77966317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)
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