检索结果-内蒙古大学图书馆

IEEE Conference on Decision and control

作者： Yushan Li Jianping He Cailian Chen Xinping Guan Dept. of Automation Key Laboratory of System Control and Information Processing Ministry of Education of China and Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Shanghai China

ISBN: (数字)9781665467612

ISBN: (纸本)9781665467629

Topology inference for networked dynamical systems (NDSs) has received considerable attention in recent years. The majority of pioneering works have dealt with inferring the topology from abundant observations of NDSs, so as to approximate the real one asymptotically. Leveraging the characteristic that NDSs will react to various disturbances and the disturbance’s influence will consistently spread, this paper focuses on inferring the topology by a few active excitations. The key challenge is to distinguish different influences of system noises and excitations from the exhibited state deviations, where the influences will decay with time and the excitation cannot be arbitrarily large. To practice, we propose a one-shot excitation based inference method to infer h-hop neighbors of a node. The excitation conditions for accurate one-hop neighbor inference are first derived with probability guarantees. Then, we extend the results to h-hop neighbor inference and multiple excitations cases, providing the explicit relationships between the inference accuracy and excitation magnitude. Specifically, the excitation based inference method is not only suitable for scenarios where abundant observations are unavailable, but also can be leveraged as auxiliary means to improve the accuracy of existing methods. Simulations are conducted to verify the analytical results.

关键词： Analytical models Network topology Topology Performance analysis Dynamical systems Testing

来源：评论

学校读者我要写书评

暂无评论

Predictability of Stochastic Dynamical system: A Probabilistic Perspective

Predictability of Stochastic Dynamical System: A Probabilist...

引用

IEEE Conference on Decision and control

作者： Tao Xu Jianping He Dept. of Automation Shanghai Jiao Tong University the Key Laboratory of System Control and Information Processing Ministry of Education of China and Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China

ISBN: (数字)9781665467612

ISBN: (纸本)9781665467629

In this paper, to characterize the predictability of discrete-time continuous-state stochastic dynamical system (SDS) and use predictability to explain the probability of making accurate predictions, we have proposed a new performance metric, i.e., predictability exponent. This metric quantifies the asymptotic exponential decaying rate of the probability that prediction errors never exceed a fixed ϵ. The novelties of this predictability metric lie in that it is proposed from an asymptotic probabilistic perspective, which i) minimizes the exponential decaying rate of prediction probability, ii) holds an approximated expression deeply related with differential entropy within an error of O(ϵ), and iii) possesses a fast converging speed from finite decaying rate of O(e −K ) in the sense of probability. Numerical examples are given to illustrate the efficiency of the obtained results.

关键词： Measurement Stochastic processes Predictive models Probabilistic logic Entropy Dynamical systems

来源：评论

学校读者我要写书评

暂无评论

Fragility-Aware Stealthy Attack Strategy for Multi-Robot systems against Multi-Hop Wireless Networks

Fragility-Aware Stealthy Attack Strategy for Multi-Robot Sys...

引用

IEEE Conference on Decision and control

作者： Yun Gao Kai Luo Chongrong Fang Jianping He Dept. of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China and Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China

ISBN: (数字)9781665467612

ISBN: (纸本)9781665467629

This paper proposes a fragility-aware stealthy attack for multiple mobile robots to secretly learn the accurate model of a multi-hop wireless network (MHWN). The stealthy attack scenario consists of three steps: active detection, node hijacking, and network eavesdropping. Our goal is to design distributed motion control strategies for naive attackers, for obtaining the connectivity information to evaluate the fragility degree of each node in MHWN. We designed a switching control strategy, which includes (i) move-to-fragile-neighbors-barycenter (MFNB) law and (ii) move-to-undetected-region-centroid (MURC) law. This strategy can drive mobile attackers to detect, hijack and eavesdrop on the MHWN’s nodes as quickly as possible. As a result, the fragility degree map of MHWN can be secretly learned to paralyze the whole network. Finally, the simulation results show that the proposed strategy is effective.

关键词： Wireless networks Simulation Spread spectrum communication Switches control systems Stability analysis Multi-robot systems

来源：评论

学校读者我要写书评

暂无评论

Challenges and Solutions for Practical Implementation of Process Bus Based Substation Protection and Automation system

Challenges and Solutions for Practical Implementation of Pro...

引用

Environment and Electrical engineering (EEE-AM), Asia Meeting on

作者： Kevin Soetomo Koichi Hamamatsu Dinh Huu Thuan Nguyen Manh Linh Lai Vu Quang Makoto Okai Engineering Dept. Power Grid System Solutions Toshiba Energy Systems & Solutions Corporation Kawasaki Japan Technical Department Southern Power Corporation (EVNSPC) Ho Chi Minh City Vietnam Engineering Dept. Toshiba Transmission & Distribution Systems (Vietnam) Ltd. Hanoi Vietnam Sales & Engineering Division Toshiba Transmission & Distribution Systems (Vietnam) Ltd. Hanoi Vietnam Protection and Control Dept. Toshiba Energy Systems & Solutions Corporation Fuchu Japan

The protection and control system in substations has undergone significant evolution since the era of hardwired systems. In recent years, the increasing trend of digital transformation (DX) across various fields, including protection and automation systems, has led to the promotion of IEC 61850 process bus-based digital substations. However, recent analysis and evaluation have revealed numerous challenges in various aspects, such as technical issues, system performance, test methods, maintenance, and economic considerations. Moreover, many of these challenges lie outside the scope of international standards like IEC 61850 and IEC 61869. As a result, the worldwide implementation of digital substations has been hindered. This paper aims to describe the issues encountered during the implementation of process bus technology and propose solutions that focus on optimizing system configuration based on our experience in implementing digital substation projects and developing MU and IED. Addressing these issues is crucial to fully unlocking the potential of digital substations. One of the most promising advantages is the availability of digital data collected from substation equipment. By utilizing this data, overall power system operational efficiency can be enhanced, and equipment management can be optimized. Predictive maintenance can be implemented, enabling the early detection of potential equipment failures, minimizing unplanned outages, and reducing the need for emergency repairs, which contribute to unnecessary carbon emissions and equipment downtime. Ultimately, digital substations empower end-users to reduce greenhouse gas emissions, improve energy efficiency, and seamlessly integrate power systems, thereby supporting the carbon-neutral initiative and facilitating the transition towards a sustainable energy future.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Polytopic input constraints in learning-based optimal control using neural networks

arXiv

引用

arXiv 2021年

作者： Markolf, Lukas Stursberg, Olaf Control and System Theory Group Dept. of Electrical Engineering and Computer Science University of Kassel Germany

This work considers artificial feed-forward neural networks as parametric approximators in optimal control of discrete-time systems. Two different approaches are introduced to take polytopic input constraints into account. The first approach determines (sub-)optimal inputs by the application of gradient methods. Closed-form expressions for the gradient of general neural networks with respect to their inputs are derived. The approach allows to consider state-dependent input constraints, as well as to ensure the satisfaction of state constraints by exploiting recursive reachable set computations. The second approach makes use of neural networks with softmax output units to map states into parameters, which determine (sub-)optimal inputs by a convex combination of the vertices of the input constraint set. The application of both approaches in model predictive control is discussed, and results obtained for a numerical example are used for illustration. Copyright © 2021, The Authors. All rights reserved.

关键词： Discrete time control systems

来源：评论

学校读者我要写书评

暂无评论

Application of Polarization and Depolarization Current Measurement for Rotating Machine Insulation analysis 3

Application of Polarization and Depolarization Current Measu...

引用

3rd International Conference on High Voltage engineering and Power systems, ICHVEPS 2021

作者： Pattanadech, N. Nimsanong, P. Worthong, T. King Mongkut's Institute of Technology Ladkrabang Department of Electrical Engineering School of Engineering Bangkok Thailand Metropolitan Electricity Authority Power System Operation and Control Section 2 Power System Control Dept. Bangkok Thailand Global Power Synergy Public Co. Ltd. Maintenance Electrical Section Manager Maintenance Electrical Phase 3-5 Coal Fired Units Rayong Thailand

ISBN: (纸本)9781665443548

Rotating machine is a vital asset of the power plants. For the motors and generators in service, the stator winding insulation is generally operated under thermal, electrical, ambient, and mechanical stresses. The combination of these stresses causes insulation degradation that can lead to early aging or severe damage and, finally, the failure of such machines. The failure of rotating machines may result in immense financial loss and other aspects. Polarization and depolarization current (PDC) measurement has been introduced as one of the time-domain dielectric spectroscopy test techniques applied for insulation condition testing. This paper represents the application of PDC measurement to evaluate the insulation for the stator bars/coil insulation experienced with various kinds of stresses. Moreover, the PDC field test of generators and high voltage motors used in the power plants is introduced. From the experiments, the dielectric parameters obtained from PDC measurements are clearly useful parameters to evaluate the electrical insulation of such rotating machines. © 2021 IEEE.

关键词： Time domain analysis

来源：评论

学校读者我要写书评

暂无评论

Multi-robot Motion Planning under MITL Specifications based on Time Petri Nets

Multi-robot Motion Planning under MITL Specifications based ...

引用

European control Conference (ECC)

作者： Sofia Hustiu Dimos V. Dimarogonas Cristian Mahulea Marius Kloetzer Dept. of Automatic Control and Applied Informatics Technical University ”Gheorghe Asachi” of Iasi Romania Division of Decision and Control System KTH Royal Institute of Technology Stockholm Sweden Aragón Institute of Engineering Research (I3A) University of Zaragoza Maria de Luna 1 Zaragoza Spain

This paper proposes a high-level path planning strategy under Time Petri net (TPN) formalism for a multiagent system, which is subject to Metric Interval Temporal Logic (MITL) specifications. The work aims to design a scalable model with respect to the number of agents, as the MITL formula requires multiple agents to ensure similar tasks. The obtained model is denoted Composed Time Petri net and it couples two TPN representations assigned to the motion of the agents, respectively to the MITL specification. The planning approach is based on model-checking methods and the results are evaluated on a case study applied in robotics industry.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Photovoltaic Utilization Benefit Evaluation of Flexible DC Traction Power systems 8

Photovoltaic Utilization Benefit Evaluation of Flexible DC T...

引用

8th IEEE Conference on Energy Internet and Energy system Integration, EI2 2024

作者： Li, Zhanhe Miao, Kaibin Bao, Weihan Lu, Chao Li, Xiaoqian Zhang, Lingyun Tsinghua University State Key Laboratory of Power System Operation and Control Dept. of Electrical Engineering Beijing100084 China Tsinghua University Sichuan Energy Internet Research Institute Sichuan Province Chengdu610299 China China Academy of Railway Science Co. Ltd Beijing100081 China

ISBN: (纸本)9798331523527

With rising demands for environmental protection and energy efficiency, integrating photovoltaic (PV) resources into flexible DC traction power systems (TPSs) has become increasingly important. However, PV integration faces two main challenges: the volatility of PV output and traction load uncertainties, as well as the effect of power flow optimization under coordinated control. Current methods, including dynamic simulation, power balance analysis, and power flow analysis, struggle to comprehensively evaluate these factors. To address this, this study proposes a PV Utilization Benefit (PVUB) evaluation model, which quantifies the operational benefits of PV integration by accounting for both PV and traction load uncertainties and power flow optimization effects. Applied to a real-world case on a Beijing Metro Line, the PVUB model effectively analyzes investment benefits and the impact of key factors, providing essential technical support for PV planning and power flow analysis of PV-integrated flexible DC TPSs. © 2024 IEEE.

关键词： Urban transportation

来源：评论

学校读者我要写书评

暂无评论

Carbon Emission Responsibility Accounting in Renewable Energy-Integrated Dc Traction Power systems

SSRN

引用

SSRN 2023年

作者： Li, Zhanhe Li, Xiaoqian Lu, Chao Ma, Kechun Bao, Weihan State Key Laboratory of Power System Operation and Control Dept. of Electrical Engineering Tsinghua University Beijing100084 China Sichuan Energy Internet Research Institute Tsinghua University Sichuan Chengdu610299 China School of Electrical Engineering Xi'an Jiaotong University Shaanxi Xi’an710049 China

This study presents a practical method to determine the carbon emission responsibility (CER) in DC traction power systems (TPSs) that incorporate renewable energy sources. The increasing importance of carbon peaking and neutrality necessitates novel carbon financing policies, such as carbon taxes and cap-and-trade, for which accurate CER calculation is crucial. This study focuses on CER related to electrical energy consumption, a complex task due to the separation of energy usage and carbon dioxide emissions. To address this, the research adapts the carbon emission flow (CEF) method to suit renewable energy-integrated DC TPSs, considering the unique characteristics of rail vehicles as energy prosumers and challenges in real-time power flow tracking. The proposed rail vehicle CEF model and real-time power flow tracing approach offer practical CER accounting solutions for system planning and real-time operation. A case study based on real engineering data validates the effectiveness of these methods, demonstrating their fairness to rail transit systems and AC utilities. © 2023, The Authors. All rights reserved.

关键词： Renewable energy resources

来源：评论

学校读者我要写书评

暂无评论

Uncertain AoI in Stochastic Optimal control of Networked and Constrained LTI systems

arXiv

引用

arXiv 2021年

作者： Hahn, Jannik Stursberg, Olaf Control and System Theory Dept. of Electrical Engineering and Computer Science University of Kassel Kassel34121 Germany

— This paper addresses finite-time horizon optimal control of single-loop networked control systems with stochastically modeled communication channel and disturbances. To cope with the uncertainties, an optimization-based control scheme is proposed which uses a disturbance feedback and the age of information as central aspects. The disturbance feedback is an extension of the control law used for balanced stochastic optimal control previously proposed for control systems without network. Balanced optimality is understood as a compromise between minimizing of expected deviations from the reference and minimization of the uncertainty of future states. Time-varying state constraints as well as time-invariant input constraints are considered, and the controllers are synthesized by semi-definite programs. © 2021, CC BY.

关键词： Networked control systems

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：