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Frequency-Geometric Identification of Magnetization Characteristics of Switched Reluctance Machine 开关磁阻电机磁化特性的频率几何辨识
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.839
L. Kadi, A. Brouri, A. Ouannou
Accurate modeling of electrical drives for online testing is a relevant problem. Switched Reluctance Machine (SRM) has lately attracted significant attention because it has several advantages compared to conventional engines. It is simple, free of rare-earth and fault-tolerant machine. An analytical model of a SRM has not been reported yet due to the dynamic and strong nonlinearity of SRM. The most SRM control and applications are based on several assumptions and simplifications. Therefore, it is convenient to develop an accurate approach to identify the SRM characteristics. In this paper, an analytical modeling and identification method of magnetization characteristics of Switched Reluctance Machine (SRM) is proposed. Presently, an exact mathematical model of SRM is established. Unlike several previous studies, in this approach the system nonlinearities of SRM are allowed to be hysteresis (i.e. the hysteresis effect is considered) and taking account the inherent magnetic nonlinearity. Indeed, the SRM is considered as highly nonlinear which makes the modeling of these machines difficult to achieve. Then, it is convenient to develop an accuracy model of SRM because it is always operated in the magnetically saturated mode to maximize the energy transfer. The developed model can be used in control, simulation and design development. Furthermore, an identification method, at standstill test, based on frequency technics is developed allowing the identification of SRM nonlinearities (considering the saturation and the hysteresis effects). In this respect, it is shown that the nonlinear behavior of SRM can be exactly described by a block-oriented nonlinear structure. Specifically, the SRM can be described by a Wiener nonlinear model. Compared to the existing methods, the proposed study gives good accuracy of flux-linkage value characteristics and enjoys the simplicity of implementation.
电气传动系统在线测试的准确建模是一个相关问题。开关磁阻电机(SRM)与传统发动机相比具有许多优点,近年来备受关注。它是一种简单、不含稀土、容错的机器。由于SRM的动态性和强非线性,目前还没有关于SRM的解析模型的报道。大多数SRM控制和应用都是基于几个假设和简化。因此,开发一种准确的方法来识别SRM特性是很方便的。提出了一种开关磁阻电机(SRM)磁化特性的解析建模与辨识方法。目前,建立了精确的SRM数学模型。与以往的一些研究不同,该方法允许SRM的系统非线性为迟滞(即考虑迟滞效应),并考虑固有的磁非线性。事实上,SRM被认为是高度非线性的,这使得这些机器的建模很难实现。由于SRM始终工作在磁饱和模式下,以最大限度地实现能量传递,因此便于建立SRM的精度模型。所建立的模型可用于控制、仿真和设计开发。此外,提出了一种基于频率技术的静止状态试验识别方法,可以识别SRM非线性(考虑饱和和迟滞效应)。在这方面,证明了SRM的非线性行为可以用面向块的非线性结构来精确描述。具体来说,SRM可以用维纳非线性模型来描述。与现有方法相比,该方法具有较好的通量链值特征精度,且实现简单。
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引用次数: 5
On Some Global Properties of Multivalued Simple Waves 关于多值简单波的一些全局性质
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.1022
D. V. Tunitsky
The Cauchy problem for one-dimensional quasilinear wave equation is considered. In the case that its solutions are multivalued simple waves, we derive explicit expressions in quadratures by introducing global characteristic coordinates. The main result of the paper is a theorem on some global properties of multivalued simple waves.
研究一维拟线性波动方程的柯西问题。在其解为多值简单波的情况下,通过引入全局特征坐标,导出了正交的显式表达式。本文的主要结果是关于多值简单波的一些整体性质的一个定理。
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引用次数: 0
Statistical Properties of VANET-based Information Spreading 基于vanet的信息传播统计特性研究
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.895
I. Varga, G. Kocsis
In this work, we present a robust model of vehicular ad hoc networks (VANET) in order to study information spreading on such topologies. Vehicles are moving along the fastest routes between their starting points and their destinations on a map derived from a real urban topology. Vehicles can exchange information through the use of short-range wireless communication devices. The source of information is a roadside unit which provides packets for the nearby vehicles. These agents can carry and forward messages for others. As a result of the data dissemination, the major part of the system becomes informed quite quickly. Presented results include the investigation of information spreading in the system, e.g. the time evolution of the average awareness, the age distribution of information owned by separate vehicles and the statistical properties of time intervals between information exchange events. It has been shown how the effectiveness of this complex system depends on the density of intelligent devices. Scale-free behavior was found by time series analysis. Our computer simulation results can help to design smart-city applications of the future.
在这项工作中,我们提出了一个鲁棒的车辆自组织网络(VANET)模型,以研究信息在这种拓扑结构上的传播。车辆沿着从起点到目的地的最快路线行驶,这是由真实的城市拓扑图绘制的地图。车辆可以通过使用短程无线通信设备交换信息。信息源是一个路边单元,它为附近的车辆提供信息包。这些代理可以为其他代理携带和转发消息。由于数据的传播,系统的主要部分可以相当迅速地获得信息。给出的结果包括调查信息在系统中的传播,例如平均意识的时间演变,独立车辆拥有的信息的年龄分布以及信息交换事件之间时间间隔的统计性质。研究表明,这个复杂系统的有效性取决于智能设备的密度。通过时间序列分析发现无标度行为。我们的计算机模拟结果可以帮助设计未来的智慧城市应用。
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引用次数: 0
An Algorithm to Search for All Minimal Cuts in a Flow Network 流网络中所有最小切口的搜索算法
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.744
M. Forghani-elahabad, N. Mahdavi-Amiri
Reliability evaluation approaches exploit a variety of tools for system modeling and calculation of reliability indices. Most proposed approaches in the literature are in terms of minimal cuts (MCs) or minimal paths. Hence, finding all the MCs in a network is an attractive problem in network flow and reliability theory. Here, investigating some works related to the MC problem, we first point out a number of defects in certain proposed algorithms, and present certain new techniques to rectify the flaws in two algorithms. Moreover, we present some techniques to improve the algorithms. Using our results, we propose an improved algorithm for finding all the MCs in a flow network. A benchmark network example is used to illustrate the performance of the algorithm. The proposed algorithm is shown to be correct. Finally, after establishing the complexity results, we demonstrate the proposed algorithm to be more efficient than some existing algorithms.
可靠性评估方法利用各种工具进行系统建模和可靠性指标的计算。文献中提出的大多数方法都是根据最小切割(MCs)或最小路径。因此,在网络流和可靠性理论中,找到网络中的所有mc是一个很有吸引力的问题。在本文中,我们考察了一些与MC问题相关的工作,首先指出了某些算法中的一些缺陷,并提出了一些新技术来纠正这两种算法中的缺陷。此外,我们还提出了一些改进算法的技术。利用我们的结果,我们提出了一种改进的算法来查找流网络中的所有mc。通过一个网络实例说明了该算法的性能。结果表明,该算法是正确的。最后,在建立复杂度结果后,我们证明了该算法比现有算法更有效。
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引用次数: 2
Determining the Vertical Force When Steering 确定转向时的垂直力
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.870
A. Tuan, Binh Thang
When the vehicles move at high velocity and quickly steer, the vehicles can be rollover. The first sign of this phenomenon is that two wheels on the same side are completely separated from the road surface. The typical value for this sign is the vertical force FZ at each wheel. If this value gradually decreases to zero, the wheel runs the risk of separating from the road surface that may lead to rollover. Therefore, the value of the vertical force Fz in different conditions needs to be determined to detect the imminent limit of the rollover phenomenon. This research established the spatial dynamic model of the vehicle to determine the vertical force FZ based on the simulation method. Besides, the equation describing the relationship between vertical force FZ, velocity v, and acceleration steering e corresponding to the value of steering angle d is also established by the calculation process. From this equation, the value of the vertical force FZ can be simply calculated with relatively high accuracy based on determining conditions. The results of this research are the basis for determining and establishing the vehicle's rollover limit.
当车辆高速行驶和快速转向时,车辆会发生侧翻。这种现象的第一个迹象是同一侧的两个车轮完全与路面分离。这个符号的典型值是每个轮子上的垂直力FZ。如果该值逐渐降至零,则车轮有可能与路面分离,从而导致侧翻。因此,需要确定不同条件下的垂直力Fz的值,以检测侧翻现象的即将极限。本研究基于仿真方法建立了车辆的空间动力学模型,以确定垂直力FZ。此外,通过计算还建立了垂直力FZ、速度v与转向角d值对应的转向加速度e之间的关系式。由该式可以根据确定条件,简单地计算出垂直力FZ的值,精度较高。研究结果为确定和确定车辆侧翻限值提供了依据。
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引用次数: 9
Computational Models of Trajectory Investigation of Marine Geophysical Fields and Its Implementation for Solving Problems of Map-Aided Navigation 海洋地球物理场轨迹调查计算模型及其在地图辅助导航中的实现
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.972
L. Kiselev, V. Kostousov, A. Medvedev, A. E. Tarkhanov, K. V. Dunaevskaya
Comprehensive investigations of geophysical fields (GPF) of the ocean are among the top priority problems in underwater robotics. Problems reside in developing automated systems capable of real-time operation for gathering, accumulating, and processing diverse geophysical information. The data’s total volume is applied for long-term or real-time monitoring of marine areas, environment or objects surveillance, mapping certain regions, or anomalies in geographical coordinates. One of the main elements of such systems is the computational models sensitive to properties of geophysical fields, features of search routes of underwater vehicles, and particular aspects of missions performed during trajectory measurements and features of navigational support tasks. The work considers computational models of comprehensive interpretation of the results of trajectory measurements of geophysical fields using an autonomous underwater vehicle (AUV), and estimation of accuracy of map-aided navigation on the reconstructed map of geophysical fields. Algorithms and software consider distinctive features of representation of bathymetry, magnetometry, and gravimetry data visualized in 2D and 3D. Algorithm of map-aided navigation by the reconstructed fields is discussed. The final assessments of the considered models’ accuracy consider averaged errors of measurements, mapping, and inertial navigation. Obtained assessments are based on theoretical investigations, results of model experiments, and experimental trials of AUV’s systems under actual operating conditions.
海洋地球物理场的综合探测是水下机器人研究的首要问题之一。问题在于开发能够实时操作的自动化系统来收集、积累和处理各种地球物理信息。数据总量用于海洋区域的长期或实时监测、环境或物体监测、特定区域的测绘或地理坐标的异常。这种系统的一个主要要素是计算模型对地球物理场的特性、水下航行器搜索路线的特征、在轨迹测量期间执行的任务的特定方面和导航支持任务的特征敏感。该工作考虑了使用自主水下航行器(AUV)对地球物理场轨迹测量结果进行综合解释的计算模型,以及在地球物理场重建地图上估计地图辅助导航的精度。算法和软件考虑了在2D和3D中可视化的测深、磁测和重力数据的独特特征。讨论了利用重构场进行地图辅助导航的算法。对所考虑的模型精度的最终评估考虑了测量、测绘和惯性导航的平均误差。获得的评估是基于理论研究、模型实验结果和AUV系统在实际操作条件下的实验试验。
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引用次数: 5
Automation of Cluster Large-Scale Production Systems 集群大规模生产系统的自动化
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.1005
V. Chadeev, N. Aristova
The paper covers the рroduction of capital goods of various types of industrial robots in the context of industrial clusters. It uses a model of production, invariant with the types of technological operations (TOs). The paper examines algorithms for three automation options: full рroduction of capital goods, partial рroduction of capital goods, use of robots purchased outside the cluster.
本文研究了产业集群背景下各类工业机器人的资本品生产。它使用生产模型,与技术操作(TOs)的类型保持不变。本文研究了三种自动化选项的算法:全部生产资本品、部分生产资本品、使用集群外购买的机器人。
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引用次数: 0
Multi-Criteria Estimation of Input Parameters in Natural Gas Quality Analysis 天然气质量分析中输入参数的多准则估计
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.984
I. Brokarev, S. Vaskovskii
In this paper, we present a method for assessing input parameters in a statistical model used for the quality analysis of the natural gas. The analysis is done by measuring physical quantities of natural gas through the hierarchy analysis, compromise programming, correlation analysis and assessing the practical possibility of measuring selected input physical quantities by available means. The problems arising when selecting input parameters are also considered. The results are compared with the previously obtained results of the model input parameters correlation analysis in order to improve the developed system for natural gas quality analysis. The proposed method is applied to assess input parameters for certain samples of natural gas based mixtures. Based on the results of the multicriteria assessment, the speed of sound, thermal conductivity and concentration of carbon dioxide were selected as input parameters for the developed natural gas quality analysis system.
在本文中,我们提出了一种评估用于天然气质量分析的统计模型中的输入参数的方法。通过层次分析、折衷规划、关联分析和评估可用手段测量选定输入物理量的实际可能性,对天然气物理量进行测量,从而完成分析。同时考虑了输入参数选择时出现的问题。将所得结果与已有的模型输入参数相关分析结果进行比较,以改进所开发的天然气质量分析系统。所提出的方法被用于评估某些天然气基混合物样品的输入参数。根据多指标评价结果,选择声速、导热系数和二氧化碳浓度作为开发的天然气质量分析系统的输入参数。
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引用次数: 1
Development of Unified Approaches to Building Neural Network and Mathematical Models Based on Digital Data 基于数字数据建立神经网络和数学模型的统一方法的发展
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.4.1017
N. Gabdrakhmanova, M. Pilgun
The paper considers the problem of developing approaches to building mathematical models based on digital data of real objects. The data are in text format and contains information about the behavior of the dynamic system. The information selected from the text data enables building of neural network and mathematical models of the dynamic system. The adequacy of the models is evaluated by analytical and numerical methods. The results are meaningfully interpreted. As a result of the study, it was confirmed that the algorithms and approaches for building mathematical models to solve the considered range of problems using digital data can be unified. The analysis of the obtained solutions showed that the con-clusions drawn on the basis of the built mathematical models and the conclusions drawn with the se-mantic neural network analysis of texts are consistent with each other. Therefore, one can talk about the positive results of the models developed. The models developed can be used in solving managerial tasks, planning and situation prediction.
本文研究了基于实物数字数据建立数学模型的方法问题。数据采用文本格式,包含有关动态系统行为的信息。从文本数据中选择的信息可以建立动态系统的神经网络和数学模型。通过分析方法和数值方法对模型的充分性进行了评价。对结果进行了有意义的解释。研究结果表明,利用数字数据建立数学模型来解决所考虑的一系列问题的算法和方法是可以统一的。对解的分析表明,建立的数学模型得出的结论与文本语义神经网络分析得出的结论是一致的。因此,人们可以谈论所开发的模型的积极结果。所开发的模型可用于解决管理任务、计划和情况预测。
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引用次数: 0
Numerical Methods for Constructing Solutions of Functional Differential Equations of Pointwise Type 点型泛函微分方程解的数值构造方法
Q3 Engineering Pub Date : 2020-01-01 DOI: 10.25728/ASSA.2020.20.2.878
Beklaryan Armen
The article discusses construction of traveling wave type solutions for the FrenkelKontorova model on the propagation of longitudinal waves. For the first time, based on the existence and uniqueness theorem of traveling wave type solutions, as well as the approximation theorem, a complete family of traveling wave type solutions is constructed in the form of subfamilies of bounded solutions (horizontals) and unbounded solutions (verticals).
本文讨论了纵波传播的FrenkelKontorova模型行波型解的构造。首次基于行波型解的存在唯一性定理和近似定理,以有界解(水平)和无界解(垂直)的子族形式构造了一个完整的行波型解族。
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引用次数: 2
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Advances in Systems Science and Applications
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