检索结果-内蒙古大学图书馆

Automatic carrier landing system based on active disturbance rejection control with a novel parameters optimizer

Aerospace Science and Technology 2017年 69卷 149-160页

作者： Yue Yu Honglun Wang Na Li Zikang Su Jianfa Wu School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing 100191 China Unmanned System Research Institute Beihang University Beijing 100191 China

This paper proposes an active disturbance rejection control (ADRC) scheme for automatic carrier landing system (ACLS) in final approach. To track desired touchdown point (DTP) altitude in the presence of carrier air wake turbulence and deck motion, based on the estimation and compensation of internal dynamics and external disturbances by extended state observer (ESO), outer-loop altitude controller and inner-loop attitude controllers are designed via ADRC. Moreover, tracking differentiator-based deck motion compensation (TD-DMC) is designed to eliminate the inherent phase lag in ACLS. In addition, controller parameters are optimized via a novel Levy flight based whale optimization algorithm (LWOA). Finally, comparative simulations demonstrate that the proposed ADRC-based ACLS has better tracking performance and robustness compared to conventional ACLS.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research on model based design method of permanent magnet synchronous motor servo system based on FPGA

引用

Journal of Physics: Conference Series 2018年第1期1074卷

作者： Yu, Shimao Zhang, Hualiang Zeng, Peng Zhang, Tao Chen, Xiyou Key Laboratory of Industrial Control Network and System Shenyang Institute of Automation Chinese Academy of Sciences. Shenyang China. Key Laboratory of Industrial Control Network and System Shenyang Institute of Automation Chinese Academy of Sciences. Shenyang China. School of electrical engineering Dalian University of Technology. Dalian China. School of electrical engineering Dalian University of Technology. Dalian China.

The ac servo system plays an increasingly important role in modern society. The ac servo drive technology based on FPGA becomes important research direction for its advantages of fast processing speed and flexible designing. A permanent magnet synchronous motor servo control system based on FPGA was model-based designed in this paper. It built three-closed-loop servo control model in Simulink which can simulate the performance of the algorithm, and it completed automatic code generation and configuration in Xilinx Zynq–7000. In addition, it built a complete set of permanent magnet synchronous motor servo control hardware platform. This paper proposes an integrated design and simulation method based on FPGA servo control to improve the efficiency of system design.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Assessment of energy storage viability for a PV power plant injecting during peak load time

Assessment of energy storage viability for a PV power plant ...

引用

IEEE International Symposium on Power Electronics for Distributed Generation systems (PEDG)

作者： Reginaldo V. Ferreira Sidelmo M. Silva Danilo I. Brandao Hélio M. A. Antunes Nicolas T. D. Fernandes Dept. of Control and Automation Federal Institute of Minas Gerais UFMG Betim Brazil Graduate Program in Electrical Engineering Federal University of Minas Gerais UFMG Belo Horizonte Brazil

ISBN: (纸本)9781509053407

Photovoltaic (PV) power plants are a form of renewable energy and their importance is increasing all around the world. In Brazil, the PV power plants connected to the grid are regulated through a credit compensation, in which the prosumer pays the difference between consumed and generated energy. Medium voltage consumers pay different prices for the energy consumed in peak load time and off-peak load time. This paper compares the return of investments of a PV plant without and with energy storage systems. This latter injects active power during peak load time. Results show that although the plant without storage presents lowest costs, the solution with batteries can be more profitable depending on the energy tariff and the equipment cost.

关键词： Batteries Inverters Power generation Discharges (electric) Lead compounds Lead

来源：评论

学校读者我要写书评

暂无评论

Preserving data-privacy with added noises: Optimal estimation and privacy analysis

arXiv

引用

arXiv 2017年

作者： He, Jianping Cai, Lin Guan, Xinping Dept. of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai China Dept. of Electrical & Computer Engineering University of Victoria BC Canada

Networked systems often relies on distributed algorithms to achieve a global computation goal with iterative local information exchanges between neighbor nodes. To preserve data privacy, a node may add a random noise to its original data for information exchange at each iteration. Nevertheless, a neighbor node can estimate other’s original data based on the information it received. The estimation accuracy and data privacy can be measured in terms of (ϵ, δ)-data-privacy, defined as the probability of ϵ-accurate estimation (the difference of an estimation and the original data is within ϵ) is no larger than δ (the disclosure probability). How to optimize the estimation and analyze data privacy is a critical and open issue. In this paper, a theoretical framework is developed to investigate how to optimize the estimation of neighbor’s original data using the local information received, named optimal distributed estimation. Then, we study the disclosure probability under the optimal estimation for data privacy analysis. We further apply the developed framework to analyze the data privacy of the privacy-preserving average consensus algorithm and identify the optimal noises for the algorithm. Copyright © 2017, The Authors. All rights reserved.

关键词： Iterative methods

来源：评论

学校读者我要写书评

暂无评论

Integral augmented nonlinear differentiator for noisy signals

Integral augmented nonlinear differentiator for noisy signal...

引用

Asian control Conference

作者： Zikang Su Honglun Wang Na Li Yue Yu Jianfa Wu SHENYUAN Honors College Beihang University Beijing China School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China Unmanned System Research Institute Beihang University Beijing China

ISBN: (纸本)9781509015740;9781509015733

This paper proposed an arctangent function based integral augmented nonlinear differentiator (IAND) for obtaining of the noise-less derivative signal from a noisy measurement signal. The basic idea of proposed IAND with high noise-attenuation effect is to establish the differentiator by expanding the signal dynamics with extra state variable representing the integrated noisy measurement, then with the integral of measurement as input, the IAND is formulated to achieve better noise suppression ability without appreciable delay. Moreover, the convergence characteristic and anti-noise property in the frequency domain are analyzed via singular perturbation theory and describing function method, respectively. The simulation comparison results with other differentiators show the superiority of IAND in noise suppression.

关键词： Noise measurement Pollution measurement Convergence Frequency-domain analysis Perturbation methods Estimation Acceleration

来源：评论

学校读者我要写书评

暂无评论

Self-Awareness for Autonomous systems

引用

PROCEEDINGS OF THE IEEE 2020年第7期108卷 971-975页

作者： Dutt, Nikil Regazzoni, Carlo S. Rinner, Bernhard Yao, Xin Nikil Dutt (Fellow IEEE) received the Ph.D. degree from the University of Illinois at Urbana–Champaign Champaign IL USA in 1989.""He is currently a Distinguished Professor of computer science (CS) cognitive sciences and electrical engineering and computer sciences (EECS) with the University of California at Irvine Irvine CA USA. He is a coauthor of seven books. His research interests include embedded systems electronic design automation (EDA) computer architecture distributed systems healthcare Internet of Things (IoT) and brain-inspired architectures and computing.""Dr. Dutt is a Fellow of ACM. He was a recipient of the IFIP Silver Core Award. He has received numerous best paper awards. He serves as the Steering Committee Chair of the IEEE/ACM Embedded Systems Week (ESWEEK). He is also on the steering organizing and program committees of several premier EDA and embedded system design conferences and workshops. He has served on the Editorial Boards for the IEEE Transactions on Very Large Scale Integration (VLSI) Systems and the ACM Transactions on Embedded Computing Systems and also previously served as the Editor-in-Chief (EiC) for the ACM Transactions on Design Automation of Electronic Systems. He served on the Advisory Boards of the IEEE Embedded Systems Letters the ACM Special Interest Group on Embedded Systems the ACM Special Interest Group on Design Automationt and the ACM Transactions on Embedded Computing Systems. Carlo S. Regazzoni (Senior Member IEEE) received the M.S. and Ph.D. degrees in electronic and telecommunications engineering from the University of Genoa Genoa Italy in 1987 and 1992 respectively.""He is currently a Full Professor of cognitive telecommunications systems with the Department of Electrical Electronics and Telecommunication Engineering and Naval Architecture (DITEN) University of Genoa and a Co-Ordinator of the Joint Doctorate on Interactive and Cognitive Environments (JDICE) international Ph.D. course started initially as EU Erasmus Mundus Project and

Autonomous systems are able to make decisions and potentially take actions without direct human intervention, which requires some knowledge about the system and its environment as well as goal-oriented reasoning. In computer systems, one can derive such behavior from the concept of a rational agent with autonomy (“control over its own actions”), reactivity (“react to events from the environment”), proactivity (“act on its own initiative”), and sociality (“interact with other agents”) as fundamental properties \n[1]\n. Autonomous systems will undoubtedly pervade into our everyday lives, and we will find them in a variety of domains and applications including robotics, transportation, health care, communications, and entertainment to name a few. \nThe articles in this month’s special issue cover concepts and fundamentals, architectures and techniques, and applications and case studies in the exciting area of self-awareness in autonomous systems.

关键词： Special issues and sections Autonomous systems Self-aware Robot sensing systems Computational modeling

来源：评论

学校读者我要写书评

暂无评论

Modular Fault Diagnosis in Fixed-Block Railway Signaling systems

引用

IFAC-PapersOnLine 2016年第3期49卷 459-464页

作者： Durmus, Mustafa S. Ustoglu, lker Tsarev, Roman Y. Schwarz, Michael Electrical and Electronics Engineering Department Pamukkale University Denizli Turkey Control and Automation Engineering Department Yildiz Technical University Istanbul Turkey Institute of Space and Information Technology Siberian Federal University Krasnoyarsk Russia Computer Architecture and System Programming Kassel University Kassel Germany

The diagnosis of possible faults in railway signaling systems is an important issue to provide safe travel and transportation in railways. Signaling system designers have to consider the possible faults which may occur in railway field components both on the requirements preparation phase and on the development phase of the signaling system software or namely, the interlocking system. Although the diagnosis of different unobservable faults is relatively hard, especially for large scale railway fields, this complexity can be overcome by using the Discrete Event system (DES) based modular diagnosis approach which is explained in this paper. The main advantage of using such modular approach for fault diagnosis in fixed-block signaling systems is the inspection of the diagnosability of the whole system with respect to its subsystems (railway field components). In this study, the diagnosability of the railway field equipment and the whole system is also explained with a case study. © 2016

关键词： Fault detection Discrete event simulation Failure analysis Railroad signal systems Railroads Signaling Development phase Field components Field equipment Fixed block signaling Interlocking systems Modular approach Railway signaling systems Signaling systems

来源：评论

学校读者我要写书评

暂无评论

Distributed trajectory optimization for multiple solar-powered UAVs target tracking in urban environment by Adaptive Grasshopper Optimization Algorithm

引用

Aerospace Science and Technology 2017年 70卷 497-510页

作者： Jianfa Wu Honglun Wang Na Li Peng Yao Yu Huang Zikang Su Yue Yu School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Shenyuan Honors College of Beihang University Beijing 100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing 100191 China Unmanned System Research Institute Beihang University Beijing 100191 China College of Engineering Ocean University of China Qingdao 266100 China

Aiming at the trajectory optimization of the solar-powered UAVs (SUAVs) cooperative target tracking in urban environment, the distributed model predictive control (DMPC) method based on Adaptive Grasshopper Optimization Algorithm (AGOA) is proposed in this paper. Firstly, the cooperative target tracking problem in urban environment is modeled by formulating the SUAVs kinematic and target models, the urban environment constraints, solar power harvesting and consumption models for SUAV, and sight occlusions by constructions. Especially, the sight occlusions in urban environment for SUAV are taken into consideration for the first time in this paper. A judgment method of sight occlusions for SUAV is proposed to make the calculation of the energy index more precise. Second, based on the precise modeling, the DMPC method is adopted as the framework for trajectory optimization in real time. Third, AGOA, a novel intelligent algorithm to mimic the behaviors of grasshoppers, is proposed to be the DMPC solver. The proposed AGOA has a better searching ability than the traditional GOA and some other intelligent algorithms by introducing some improvement measures e.g. the natural selection strategy, the democratic decision-making mechanism, and the dynamic feedback mechanism based on the 1/5 Principle. Finally, the effectiveness of the proposed method is demonstrated by the simulations.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Repeated Strike Process During Disconnector Operation in Ultra-High Voltage Gas-Insulated Switchgear

引用

Plasma Science and Technology 2016年第3期18卷 247-253页

作者：关永刚蔡元纪陈维江刘卫东李志兵岳功昌张俊民 State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Corporation of China Beijing 100031China China Electric Power Research Institute Beijing 100192China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Very fast transient over-voltage （VFTO）, induced by disconnector operations in gas- insulated switchgears, has become the limiting dielectric stress at ultra-high voltage levels. Much work has been done to investigate single-strike waveforms of VFTO. However, little study has been carried out investigating the repeated strike process, which would influence VFTO significantly. In this paper, we carried out 450 effective experiments in an ultra-high voltage test circuit, and conducted calculations through the Monte Carlo simulation method, to investigate the repeated strike process. Firstly, the mechanism of the repeated strike process is proposed, based on the ex- perimentai results. Afterwards, statistical breakdown characteristics of disconnectors are obtained and analyzed. Finally, simulations of the repeated strike process are conducted, which indicate that the dielectric strength recovery speed and polarity effect factor have a joint effect on VFTO. This study enhances the understanding of the nature of VFTO, and may help to optimize the disconnector designed to minimize VFTO.

关键词： disconnector （DS） repeated strike process discharge statistical breakdowncharacteristics ultra-high voltage （UHV） very fast transient over-voltage （VFTO）

来源：评论

学校读者我要写书评

暂无评论

High Direction-changing Frequency Bidirectional DC-DC Converter for Charging/Discharging Applications

High Direction-changing Frequency Bidirectional DC-DC Conver...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： Ming Fu Tiecai Li Donglai Zhang Yalin Li China Shenzhen Academy of Aerospace Technology Power Electronic and Motion Control Research Center Harbin Institute of Technology Shenzhen Graduate School Shenzhen Shenzhen China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China Electrical System Engineering Department Institute of Telecommunication Satellite China Academy of Space Technology Beijing China

Based on the battery charging and discharging regulator (BCDR) in spacecraft power conditioning unit application, a bidirectional DC-DC converter BCDR with high direction-changing frequency is proposed in this paper, including the Weinberg-buck bidirectional DC-DC topology and the corresponding bidirectional control. Additionally, the test on the BCDR prototype shows that BCDR parallel modules could achieve the quick switching between charging and discharging with the direction-changing frequency meeting the requirement of 1 kHz, the regulated power bus of small voltage ripple, and high charging and discharging efficiency, in agreement with the expected design.

关键词： Integrated circuits Partial discharges Switches Batteries Power conditioning DC-DC power converters Regulators

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：