检索结果-内蒙古大学图书馆

Interaction Quantification of MTDC Systems Connected with Weak AC Grids

CSEE Journal of Power and Energy Systems 2024年第5期10卷 2088-2099页

作者： Wanning Zheng Jiabing Hu Li Chai Bing Liu Zixia Sang Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China College of Control Science and Engineering Zhejiang UniversityHangzhou 310027China State Grid Hubei Economic Research Institute Wuhan 430077China

The small-signal stability of multi-terminal high voltage direct current(HVDC)systems has become one of the vital issues in modern power *** among voltage source converters(VSCs)have a significant impact on the stability of the *** paper proposes an interaction quantification method based on the self-/en-stabilizing coefficients of the general N-terminal HVDC system with a weak AC network ***,we derive the explicit formulae of self-/en-stabilizing coefficients for any N-terminal HVDC system,which can quantify the interactions through different paths *** relation between the self-/en-stabilizing coefficients and the poles of the system can be used to evaluate the impact of the interactions on the system stability ***,we employ the obtained formulae to analyze the parameter sensitivity and explain how a parameter affects the stability of the system through different paths of ***,extensive examples are given to demonstrate the effectiveness of the proposed method.

关键词： Interactions multi-terminal HVDC self-/enstabilizing coefficients small-signal stability

来源：评论

学校读者我要写书评

暂无评论

Modeling Axial Compressor Systems Using Deep Learning Methods

Modeling Axial Compressor Systems Using Deep Learning Method...

引用

2023 Annual Intermountain engineering, Technology and Computing, IETC 2023

作者： Wilson, Kellie Schoen, Marco P. Idaho State University Measurement and Control Engineering Research Center Department of Mechanical Engineering Pocatello United States

ISBN: (纸本)9798350335903

Studying the characteristics of complex nonlinear systems and designing control strategies necessitates the development of computationally efficient methods. In particular, compressor systems will benefit from accurate models that capture the nonlinear dynamics. In this paper, an overview of neural networks is given with a focus on Long-Short Term Memory (LSTM) networks for dynamic systems. A simple test system is presented for verifying the LSTM approach for single input single output (SISO) systems. An axial compressor system is used to simulate its nonlinear dynamics using the Toolbox for the Modeling and Analysis of Thermodynamic Systems (T-MATS). The proposed LSTM approach is demonstrated for the multiple input multiple output (MIMO) axial compressor model. The proposed approach indicates that LSTM based modeling for highly nonlinear MIMO systems can yield accurate model characterizations. © 2023 IEEE.

关键词： Long short-term memory

来源：评论

学校读者我要写书评

暂无评论

Spatial Coordination of Multiple Nonholonomic Agents With Sensory Connectivity Maintenance

引用

IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3425-3435页

作者： Chen, Xi Chen, Meimin Zhu, Lijun Chai, Li Wuhan University of Science and Technology Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan430081 China Shandong Huayu University of Technology School of Electrical Engineering Shandong253034 China School of Artificial Intelligence and Automation Wuhan430074 China Zhejiang University College of Control Science and Engineering Hangzhou310027 China

This article aims to propose a general control strategy for coordination of multiple nonholonomic agents in three dimensional space. For real-world applications, since the field sensor equipped on the mobile agents for local information detection and estimation has some limited detecting range, it is necessary to guarantee that the nearby agents must stay within this range of the onboard sensor. This is called sensory connectivity maintenance. A function termed as coordination function with sensory connectivity maintenance (CFSCM) is defined to describe the performances of the coordination as well as the sensory connectivity status between the agents. Then, a general control strategy is designed based on the proposed CFSCM for spatial coordination of multiple nonholonomic agents with sensory connectivity maintenance. Moreover, the applications of the proposed control strategy for formation with omnidirectional sensors and flocking with directional sensors are shown, respectively. Finally, some numerical examples are conducted to validate the theoretical analysis. © 2013 IEEE.

关键词： Maintenance Robot sensing systems Kinematics Vectors Electronic mail Aerospace electronics Three-dimensional displays System dynamics Robot kinematics Multi-agent systems

来源：评论

学校读者我要写书评

暂无评论

Higher-order properties and extensions for indirect MRAC and APPC of linear systems

引用

Science China(Information Sciences) 2024年第4期67卷 218-238页

作者： Yanjun ZHANG Zhipeng ZHANG Jian SUN Lei WANG Kangkang ZHANG National Key Lab of Autonomous Intelligent Unmanned Systems Beijing Institute of Technology School of Automation Beijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center College of Control Science and Engineering Zhejiang University Department of Electrical and Electronic Engineering Imperial College London KIOS Research and Innovation Center of Excellence University of Cyprus

Recently, a reference derived some new higher-order output tracking properties for direct model reference adaptive control（MRAC） of linear time-invariant（LTI） systems: limt→∞ e（i）（t） = 0, i = 1,..., n*-1, where n*and e（i）（t） denote the relative degree of the system and the i-th derivative of the output tracking error, respectively. However, a naturally arising question involves whether indirect adaptive control（including indirect MRAC and indirect adaptive pole placement control） of LTI systems still has higher-order tracking properties. Such properties have not been reported in the literature. Therefore, this paper provides an affirmative answer to this question. Such higher-order tracking properties are new discoveries since they hold without any additional design conditions and, in particular, without the persistent excitation condition. Given the higher-order properties, a new adaptive control system is developed with stronger tracking features.（1） It can track a reference signal with any order derivatives being unknown.（2） It has higher-order exponential or practical output tracking properties.（3） Finally, it is different from the usual MRAC system, whose reference signal's derivatives up to the n*order are assumed to be known. Finally, two simulation examples are provided to verify the theoretical results obtained in this paper.

关键词： higher-order tracking indirect adaptive control model reference adaptive control adaptive pole placement control

来源：评论

学校读者我要写书评

暂无评论

Analysis of influence of electrical conductivity on shock wave characteristics of spherical electrode 6

Analysis of influence of electrical conductivity on shock wa...

引用

6th International Conference on Intelligent control, measurement and Signal Processing, ICMSP 2024

作者： Zhao, Wenting Shang, Haiyan Song, Chanjing Li, Yuao Xi'an ShiYou University National Engineering Research Center for Oli & Gas Drilling and Completion Technology Downhole Measurement and Control Research Department Xi'an China

ISBN: (纸本)9798331516550

The impulse sound source generated by the "hydro-electric effect"has great development potential in the fields of rock breaking, geosteering, location determination, hydro-electric forming, water treatment and oil and gas stimulation. At present, the research of impulse sound source is mainly based on the principle and application of the breakdown between electrodes when the electrodes are discharged underwater. In this paper, a numerical model of sphere-sphere electrode was established by COMSOL to study the effect of electrical conductivity on the impulsive wave property of sound source. The results show that with the increase of conductivity, the pre-breakdown delay decreases, the first peak of discharge current and the peak of shock wave intensity increase, the channel deposition energy decreases, the leakage energy and shock wave energy both increase, and the conversion efficiency of channel deposition energy to shock wave energy increases. © 2024 IEEE.

关键词： Shock waves

来源：评论

学校读者我要写书评

暂无评论

Study on the effect of fracture on acoustic wave attenuation while drilling 6

Study on the effect of fracture on acoustic wave attenuation...

引用

6th International Conference on Intelligent control, measurement and Signal Processing, ICMSP 2024

作者： Song, Chanjing Shang, Haiyan Luo, Shushu Li, Yuao Xi'an ShiYou University National Engineering Research Center for Oli & Gas Drilling and Completion Technology Downhole Measurement and Control Research Department Xi'an China

ISBN: (纸本)9798331516550

The development of fracture directly affects the storage performance of the reservoir. In order to better evaluate the fracture information, this paper numerically simulates the fractured formation under drilling conditions using COMSOL Multiphysics finite element software, and investigates the influence laws of different fracture widths and fracture zone densities on the attenuation of transverse and stoneley waves. The results show that in the presence of a horizontal fracture next to the well, direct stoneley waves and reflected stoneley waves are observed in the full wave train;The increase of fracture width and fracture zone density will cause the energy attenuation of transverse and stoneley waves;The attenuation coefficients increase with the increase of fracture width in a power function law, and with the increase of fracture zone density in an exponential function law;Stoneley waves are more sensitive to the fracture zone density than transverse waves. © 2024 IEEE.

关键词： Exponential functions

来源：评论

学校读者我要写书评

暂无评论

Voltage Quality Improvement for Hybrid Energy Storage of DC Microgrid 11

Voltage Quality Improvement for Hybrid Energy Storage of DC ...

引用

11th International Conference on Power and Energy Systems engineering, CPESE 2024

作者： Mahmoud, Abdulrahman Babiker, Ahmed Mohamed, Mazen Ahmed, Ijaz Khalid, Muhammad Control and Instrumentation Engineering Department Saudi Arabia Department of Electrical Engineering Islamabad Pakistan Electrical Engineering Department Dhahran31261 Saudi Arabia KFUPM Interdisciplinary Research Center for Sustainable Energy Systems Saudi Arabia

ISBN: (纸本)9798350377439

DC microgrids (MGs) have recently garnered significant interest due to their efficient power conversion and simpler control systems compared to AC MGs. However, managing DC MGs presents specific challenges, especially when dealing with pulsed power loads and constant power loads, as both require rapid dynamic responses from the MG, impacting voltage quality. This paper introduces a novel control methods, including a highpass filter with model predictive control (MPC) for current distribution between the battery and supercapacitor (SC) and a neuro-fuzzy system, to address these issues. These methods adjust the SC's state of charge (SoC) following abrupt load changes and maintain its SoC within a predefined range to ensure continuous operation. Using the proposed feedback neuro-fuzzy technique, the MG can improve voltage quality and transient response, achieving results that are nearly identical to those of the MPC. Simulations conducted in MATLAB/Simulink confirm the effectiveness of this approach. © 2024 IEEE.

关键词： High pass filters

来源：评论

学校读者我要写书评

暂无评论

An Improved Method for Approximating the Infinite-Horizon Value Function of the Discrete-Time Switched LQR Problem

引用

Journal of Systems Science & Complexity 2024年第1期37卷 22-39页

作者： HOU Tan LI Yuanlong LIN Zongli Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai 200240China Charles L.Brown Department of Electrical and Computer Engineering University of VirginiaCharlottesvilleVA 22904-4743USA

This paper considers the problem of approximating the infinite-horizon value function of the discrete-time switched LQR *** particular,the authors propose a new value iteration method to generate a sequence of monotonically decreasing functions that converges exponentially to the value *** method facilitates us to use coarse approximations resulting from faster but less accurate algorithms for further value iteration,and thus,the proposed approach is capable of achieving a better approximation for a given computation time compared with the existing *** numerical examples are presented in this paper to illustrate the effectiveness of the proposed method.

关键词： Optimal control switched linear systems switched LQR problem.

来源：评论

学校读者我要写书评

暂无评论

SR-STM: Simulation–Reality Spatial–Temporal Model for Early Warning of Power Tilt in Nuclear Power Plants

引用

IEEE Internet of Things Journal 2025年第11期12卷 17854-17868页

作者： Lin, Weiqing Miao, Xiren Chen, Jing Duan, Pengbin Ye, Mingxin Xu, Yong Liu, Xinyu Jiang, Hao Fuzhou University College of Electrical Engineering and Automation Fuzhou350108 China China Nuclear Power Technology Research Institute Company Ltd. Research Department of Reactor Measurement and Control Shenzhen518000 China National Nuclear Power Operation Maintenance Technology Company Ltd. Department of Instrument & Control Equipment Hangzhou311200 China

Balanced in-core power levels in nuclear power plants (NPPs) are critical for safety, whereas power tilt disrupts this balance, reducing safety margins and posing risks. Early warning for power tilt offers an effective way of optimizing monitoring. Due to abnormal-sample scarcity and security concerns, common data-driven models train on the simulated data generated by simulators. However, achieving a satisfactory effect in practices is difficult because simulators imperfectly emulate reality. Thus, we propose a power tilt-oriented early warning method called simulation–reality spatial–temporal model (SR-STM). Motivated by the physical model in NPPs, a knowledge-guided hierarchical graph is designed to characterize spatial correlations among local power levels for SR-STM’s input. The SR-STM uses a lightweight spatial–temporal network (LST-Net) as a feature extractor, balancing precision, and efficiency. To bridge sim-real interdomain discrepancies, SR-STM utilizes node-alignment adversarial learning (NAAL) for fine weight tuning in subdomain, and eigenvalue-based scale alignment (ESA) for sim-real feature proximity. Forecasting local power levels using the SR-STM, dynamic metrics and alarm limits are calculated and compared to perform the early warning task. The online experimental prototype verifies that SR-STM surpasses various state-of-the-art methods in terms of early warning and sim-real cross-domain tasks. © 2014 IEEE.

关键词： Eigenvalues and eigenfunctions

来源：评论

学校读者我要写书评

暂无评论

State of Charge Estimation for Electric Vehicle Battery Using Support Vector Machines Technique 25

State of Charge Estimation for Electric Vehicle Battery Usin...

引用

25th International Middle East Power System Conference, MEPCON 2024

作者： Osman, Ali A. Hamad, Mostafa S. Abdel-Khalik, Ayman Samy Dessouky, Yasser G. Arab Academy for Science and Technology Research and Innovation Center Alamein Egypt Arab Academy for Science and Technology Electrical and Control Department Alexandria Egypt Faculty of Engineering Electrical Engineering Department Alexandria Egypt

ISBN: (纸本)9798350379648

State-of-charge (SOC) estimation is considered as the fundamental challenge for battery management system (BMS). the available SOC estimation methods face difficulty for accurate SOC estimation with different conditions such as (ambient temperature, the speed of wind or the humidity, etc). In this study, the training data and the testing data required in the estimation operation are collected using a real battery pack then followed by normalization. Then, lab experiment with MATLAB simulation applied to validate the results and get a powerful source of data generator. Then, the parameters in the support vector machine for regression model tuned to get the best estimated for SOC. Finally, simulation experiments have been done using python script to train the model and test a new data set. The results show the efficiency of using support vector machine for regression in estimating the battery SOC. © 2024 IEEE.

关键词： State of charge

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：