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2018 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)最新文献

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Project of Autonomous Power Plant with High-Temperature Superconductive Devices 高温超导装置自主电厂项目
L. Chubraeva, T. Sergey
The project of autonomous power plant rated at 1 MVA comprises devices, based on application of high-temperature superconductors (HTSC): axial-type synchronous generator with a wind turbine, magnetic energy storage system (SMES), peripheral power electronic devices (for both the generator and SMES) and cryogenic system. The plant is intended to provide additional electric power to a developing medical center or to be a source of uninterrupted power supply for responsible consumers of the hospital in case of any fault case. The project is based on the development and experimental investigation of several models, confirming the design of HTSC alternator and SMES.
1 MVA自主电站项目包括:基于高温超导体(HTSC)应用的轴向式风力同步发电机、磁储能系统(SMES)、外围电力电子设备(发电机和SMES)和低温系统。该电站的目的是为发展中的医疗中心提供额外的电力,或在发生故障时为医院负责任的消费者提供不间断的电力供应。本课题是在对几种模型进行开发和实验研究的基础上,确定HTSC交流发电机和SMES的设计。
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引用次数: 2
Least Squares Method for Solving a System of Linear Equations Based on Multilevel Wavelet Decomposition of the Residual 基于残差多水平小波分解求解线性方程组的最小二乘方法
V. Esaulov, R. Sinetsky
The solution of systems of linear equations has a large number of practical applications related to solving ill-conditioned problems. In paper, the technique of solving systems of linear equations based on the least squares method is considered. It is shown that the problem of the least squares method can have an alternative formulation. It consists in formulating the problem for elements of a multilevel wavelet decomposition of the residual vector. The proposed approach is demonstrated by the example of a linear quadratic problem. Experiments have shown that the wavelet decomposition of the residual can significantly improve the accuracy of solving the system of equations, making it comparable to the accuracy obtained by applying projection methods. The number of levels of the wavelet decomposition is determined by the structural parameters of the matrix. The quality of the solution can also depend on the type of wavelet used in the transformation of the residual.
线性方程组的解在求解病态问题方面有大量的实际应用。本文研究了基于最小二乘法求解线性方程组的方法。结果表明,最小二乘法问题可以有另一种形式。它包含了残差向量的多级小波分解的元素的表述问题。通过一个线性二次问题的算例验证了该方法的有效性。实验表明,残差的小波分解能显著提高方程组的解算精度,与投影法的解算精度相当。小波分解的层数由矩阵的结构参数决定。解的质量还取决于残差变换中使用的小波的类型。
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引用次数: 0
Classification of Factors Influencing on Recuperation Braking of Urban Transport and Evaluation of Their Impact 城市交通回收制动影响因素分类及影响评价
E. Spiridonov, M. Yaroslavtsev
The paper presents several approaches to the classification of factors influencing the efficiency of regenerative braking. The method of classification by the criterion of the subsystem in which the factor is manifested is considered. On the basis of simulation modeling, the influence of the mass of the vehicle, the coefficient of the main movement resistance, the type of control system and the auxiliary power was investigated. The change of the specific energy consumption on the bus of traction substations is considered as a criterion for the efficiency of regenerative braking. It is shown that a significant influence on the efficiency of energy recovery is provided by the type of control system of the vehicle and the auxiliary power.
本文介绍了影响再生制动效率因素的几种分类方法。考虑了以表现因子的子系统为标准对因子进行分类的方法。在仿真建模的基础上,研究了车辆质量、主运动阻力系数、控制系统类型和辅助动力等因素的影响。将牵引变电所母线上比能耗的变化作为再生制动效率的判据。结果表明,车辆控制系统的类型和辅助动力对能量回收效率有显著影响。
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引用次数: 0
Interdependence Modeling of the Possible Defects Set 可能缺陷集的相互依赖建模
V. Voronin, O. A. Davydov
The paper suggests original approach to the analysis of the possible defects set elements interdependence in analog technical objects. Each element of possible defects set is put in accordance with its identifier. The content and formal concepts of dependent and independent defects classes are introduced. Within the limits of accepted restrictions, these classes simulate the cause-effect relations on the set of possible defects. Quantitative assessment of many different classes of dependent defects capacity is given. The proposed models of dependent defects classes and the well-known spanning trees theorem are used to construct an algorithm for diagnostic indicators selecting. This algorithm ensures the search depth to the dependent defects class accuracy level with much lower costs. Models of dependent defects classes can also be used in the explanatory subsystem of the expert diagnostic system, which makes it possible to take into account defects multiplicities.
本文提出了一种分析模拟技术对象中可能存在的缺陷集元素相互依赖的新方法。可能缺陷集的每个元素都按照其标识符放置。介绍了依赖缺陷类和独立缺陷类的内容和形式化概念。在可接受的限制范围内,这些类模拟一组可能缺陷的因果关系。对不同类型的依赖缺陷容量进行了定量评价。利用所提出的依赖缺陷类模型和著名的生成树定理构建了诊断指标选择算法。该算法以较低的成本保证了搜索深度达到依赖缺陷类的精度水平。在专家诊断系统的解释子系统中也可以使用依赖缺陷类的模型,这使得考虑缺陷的多样性成为可能。
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引用次数: 1
Research of Change of Parameters of a Magnetic Flux of the Stator and Rotor of Special Electric Drives 特种电传动定子、转子磁通参数变化研究
V. Karandey, B. Popov, V. Afanasyev
Research, design, simulation and creation of electric actuators of different constructions including special electric actuators, is quite difficult and multidimensional task. One of the main objectives in case of a research and simulation of such electric actuators is determination of electromagnetic parameters which correctness of determination depends on complexity of a mathematical model and accuracy of the used mathematical apparatus. One of required electromagnetic parameters on which the correctness of a research and design of special electric actuators with asynchronous engines depends is the magnetic flux. The complexity of determination of a magnetic flux is that there is the continuous change of both the temporal, and spatial parameters influencing the instantaneous value of the researched value. In article the problem of definition of a magnetic flux from the electromagnetic field created by a stator winding is considered and solved. The formed electromagnetic field creates a magnetic flux from a rotor winding. The total electromagnetic field in a gap of components of special electric drives is as a result formed. For the solution of this problem was the programs of calculation allowing to receive for various angles of rotation of vectors of three-phase system of tension pictures of a real magnetic flux from the stator and a rotor of special electric drives are developed.
不同结构的电动执行器,包括特种电动执行器的研究、设计、仿真和制造是一项非常困难和多维的任务。在这种电动执行器的研究和仿真的情况下,主要目标之一是确定电磁参数,其确定的正确性取决于数学模型的复杂性和所用数学设备的准确性。磁通是异步发动机专用电动执行器研究和设计的正确性所必需的电磁参数之一。磁通量测定的复杂性在于影响研究值瞬时值的时间和空间参数是连续变化的。本文考虑并解决了定子绕组产生的电磁场中磁通量的定义问题。形成的电磁场产生来自转子绕组的磁通量。从而形成了特殊电驱动元件间隙内的总电磁场。为解决这一问题,编写了能够接收三相系统不同旋转角度的张力矢量的计算程序,并给出了特殊电驱动的定子和转子的真实磁通图像。
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引用次数: 6
Adaptive Trailer Backup Control 自适应拖车后备控制
S. Kruglov, S. Kovyrshin
We consider the problem of building a Trailer Backup Assist System that would function in conditions of a priori uncertainty about the parameters of the system itself and the external disturbances. External uncontrolled disturbances can arise from non-horizontal surfaces, the existence of significant road irregularities, variable density of soil, etc. Mathematical model of controlled trailer is justified; from this, adaptive control law is generated for movement according to the steering wheels deflection, to achieve a predetermined hitch angle. The a priori uncertainty is eliminated by means of the current parametric identification of the controlled object mathematical model, while current estimates are used directly for control law synthesis. For the formalization of system requirements, an implicit reference model is used. Justification of adaptive control system operation is built on the simplified adaptability conditions. A model example is given.
我们考虑建立一个拖车后备辅助系统的问题,该系统将在系统本身参数和外部干扰的先验不确定性条件下运行。外部不受控制的干扰可能来自非水平表面,存在明显的道路不规则性,土壤密度变化等。建立了受控拖车的数学模型;据此,根据方向盘的偏转产生运动自适应控制律,以达到预定的挂角。通过对被控对象数学模型的电流参数辨识来消除先验不确定性,而电流估计直接用于控制律综合。对于系统需求的形式化,使用了隐式参考模型。基于简化的自适应条件,对自适应控制系统的运行进行了论证。给出了一个模型实例。
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引用次数: 5
Calculated and Experimental Investigations of Resonant Step-Down DC-DC Converter Specifications for Electric Vehicles 电动汽车谐振降压DC-DC变换器性能的计算与实验研究
O. V. Kukovinets, B. K. Ospanbekov, K. M. Sidorov
The number of cars increases every year, so the ecology issues of transportation become more relevant from year to year. One of the solutions to the environmental problem is the gradual replacement of cars with internal combustion engines (ICE) by electric vehicles. However, electric transport is radically different in its design features from transport with ICE. One of such peculiarities is the necessity to supply the low-voltage electrical loads from the high voltage traction battery. The main aspects associated with the solution of this problem with the use of a special device - an isolating step-down DC-DC converter have been discussed. This paper complements the existing gaps in the following issues: power consumption by low-voltage equipment of the electric vehicle, the total load current changing, the energy balance of the auxiliary low-voltage battery (AB), the initial data for correct choice of circuit topology of converter. The results of calculated analysis and experimental dependence of the input/output characteristics of the step-down DC-DC converter under the urban traffic conditions are given. The requirements to the resonant step-down converters characteristics and positive energy balance to increase the auxiliary battery service life are formed as a result of the experimental data analysis.
汽车的数量每年都在增加,因此交通运输的生态问题每年都变得越来越重要。解决环境问题的方法之一是逐步用电动汽车取代内燃机汽车。然而,电动运输在设计特征上与内燃机运输截然不同。其中一个特点是需要从高压牵引蓄电池中提供低压电力负载。讨论了采用隔离降压DC-DC变换器这一特殊装置解决这一问题的主要方面。本文补充了电动汽车低压设备功耗、负载总电流变化、辅助低压蓄电池(AB)能量平衡、变流器电路拓扑正确选择的初始数据等方面的不足。给出了在城市交通条件下降压DC-DC变换器输入/输出特性的计算分析结果和实验依赖关系。通过实验数据分析,形成了对谐振降压变换器特性和正能量平衡提高辅助电池使用寿命的要求。
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引用次数: 0
An Approach to Multidimensional Nonlinear Optimization 一种多维非线性优化方法
D. Boldyrev, A. V. Pashkovskiy
The article presents a new approach to improving the efficiency of multidimensional nonlinear optimization. Traditional linear search is replaced by non-linear one, in which the direction of search at each step adapts to the profile of the objective function. This makes it possible to localize the extremum as quickly as possible and to shorten substantially the time of its determination. An interpolation search algorithm is proposed in the found interval of extremum localization. The objective function is modeled by a segment of a cubic spline, constructed on the basis of information about the gradient vector at the boundary points and taking into account the slope of the objective function. This allows to reduce the number of stages of interpolation search. The possibility of simplified nonsmooth interpolation by first-order splines in the area of finding an extremum is considered. Numerical results show that the new method is very efficient for the various test problems.
本文提出了一种提高多维非线性优化效率的新方法。传统的线性搜索被非线性搜索所取代,每一步的搜索方向都与目标函数的轮廓相适应。这使得尽可能快地定位极值成为可能,并大大缩短了确定极值的时间。提出了一种在极值定位发现区间内的插值搜索算法。目标函数由三次样条的一段来建模,该段基于边界点处的梯度向量信息,并考虑目标函数的斜率。这样可以减少插值搜索的阶段数。考虑了在求极值区域用一阶样条简化非光滑插值的可能性。数值结果表明,该方法对各种测试问题都是非常有效的。
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引用次数: 1
Research of the Cuts Effect on Electromagnetic Characteristics in a Conductive Cylindrical Shell as a Structural Element of an Electrical Machine 作为电机结构元件的导电圆柱壳切割对电磁特性影响的研究
E. Danilina, A. Setrakova
A study is made of cuts effect on electromagnetic process in conductive circular cylindrical shells of finite length as a structural elements of an electrical machines. This paper presents an approach to calculation of eddy currents and integral characteristics taking into account cross cuts in different running regimes (pulsed-field, traveling variable magnetic field or shell rotation in direct currents magnetic field of extraneous sources). It is analysed dependencies of eddy currents distribution, Joule's losses, braking (rotation) torque, with variation of shell parameters, frequency supply, and sliding motion based on numerical experiments.
研究了作为电机结构元件的有限长导电圆柱壳切割对电磁过程的影响。本文提出了一种考虑不同运行状态下(脉冲场、移动变磁场或外来源直流磁场中的壳体旋转)的涡流和积分特性的计算方法。在数值实验的基础上,分析了涡流分布、焦耳损耗、制动(转动)转矩与壳体参数变化、频率供应和滑动运动的关系。
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引用次数: 0
Frequency Methods for Synthesizing a Control System for Semiconductor Converters 半导体变换器控制系统的频率合成方法
M. A. Grigorev, A. A. Gryzlov, V. S. Katrichek
The frequency methods for synthesis of regulation of semiconductor converters feeding mechatronic modules are proposed. The stages of synthesis of current control loops and electromagnetic torque are considered. Based on experimental methods, a mathematical model of the torque control loop is proposed, which was used at the synthesis stage of the torque control loop. The proposed generalized methods for the synthesis of current control loops, electromagnetic torques based on the method of experimental frequency characteristics can be used on technological objects where the study of frequency characteristics is allowed without violating the conditions of the technological process. So, the proposed technique was successfully applied at the objects of drilling rigs when adjusting the electric drive of a drilling rig. The proposed technique has made it possible to refine and improve the speed of the EMC regulation loop by about 20%. It is established, that an experimental technique for determining the frequency characteristics of CCL has been proposed and tested, which makes it possible to evaluate the capabilities of CCLs of various electric drives, and also indicates the possibilities for expanding the band of uniform transmission of the frequencies of the CCLs under investigation. On the other hand, the extension of the band of uniform transmission of CCL allows increasing the limiting values of the rotational speed of the motor. This allows you to raise the speed of powerful compressor units without the use of multipliers to 6000 - 9000 rpm.
提出了半导体变换器馈入机电模块调节的频率合成方法。考虑了电流控制回路和电磁转矩的合成阶段。在实验方法的基础上,提出了转矩控制回路的数学模型,并用于转矩控制回路的综合阶段。本文提出的基于实验频率特性方法的电流控制回路、电磁转矩综合的广义方法,可以在不违反工艺过程条件的情况下,应用于允许研究频率特性的工艺对象。因此,在钻机电驱动调整时,该技术成功地应用于钻机对象。所提出的技术使电磁兼容调节回路的速度提高了约20%。已经提出并测试了一种用于确定CCL频率特性的实验技术,这使得评估各种电力驱动CCL的能力成为可能,并且还表明了扩大所研究的CCL频率均匀传输频带的可能性。另一方面,CCL均匀传输频带的延长允许增加电机转速的极限值。这使您可以在不使用乘数器的情况下将强大的压缩机机组的速度提高到6000 - 9000 rpm。
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引用次数: 1
期刊
2018 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)
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