检索结果-内蒙古大学图书馆

1st Joint Symposium on Computer-Aided control system Design, CACSD 2011 and systems with Uncertainty, SU 2011

作者： Soleimanzadeh, Maryam Brand, Arno J. Wisniewski, Rafael Automation and Control Section Electronic System Department Aalborg University Denmark Netherlands

ISBN: (纸本)9781457710667

This paper describes the design procedure of an optimal wind farm controller. The controller optimizes the structural load and power production simultaneously, on the basis of an analytical wind farm model. The farm model delivers maps of wind, loads and energy in the wind farm. Moreover, the model computes the wind speed at the turbines, turbine bending moments and aerodynamic power and torque. The optimal control problem is formulated based on the model for two different wind directions. The controller determines the reference signals for each individual wind turbine controller in two scenarios based on low and high wind speed. In low wind speed, the reference signals for rotor speed are adjusted, taking the trade-off between power maximization and load minimization into account. In high wind speed, the power and pitch angle reference signals are determined while structural loads are minimized. © 2011 IEEE.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Modelling of ultrasonic motor with dead-zone based on Hammerstein model structure

引用

Journal of Zhejiang University-Science A(Applied Physics & engineering) 2008年第1期9卷 58-64页

作者： Xin-liang ZHANG Yong-hong TAN Department of Automation School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200030 China Laboratory of Intelligent Systems and Control Engineering Guilin University of Electronic Technology Guilin 541004 China

The ultrasonic motor (USM) possesses heavy nonlinearities which vary with driving conditions and load-dependent characteristics such as the dead-zone. In this paper, an identification method for the rotary travelling-wave type ultrasonic motor (RTWUSM) with dead-zone is proposed based on a modified Hammerstein model structure. The driving voltage contributing effect on the nonlinearities of the RTWUSM was transformed to the change of dynamic parameters against the driving voltage. The dead-zone of the RTWUSM is identified based upon the above transformation. Experiment results showed good agreement be- tween the output of the proposed model and actual measured output.

关键词： Ultrasonic motor （USM） Hammerstein model Dead-zone Nonlinearity Identification

来源：评论

学校读者我要写书评

暂无评论

Fast Characterization of Lithium-Ion Battery Impedance and Nonlinearity Using Optimized Multisine Perturbation Signal

引用

IEEE Transactions on Industrial electronics 2025年

作者： Fan, Chuanxin Zhang, Kui Peng, Qiao Tian, Jinpeng Liu, Kailong Chung, Chi Yung Nanjing Institute of Technology School of Automation Nanjing211167 China The Hong Kong Polytechnic University Department of Electrical and Electronic Engineering Research Centre for Grid Modernisation Kowloon999077 Hong Kong Queen’s University Belfast Information Technology Analytics & Operations group BelfastBT9 5EE United Kingdom Shandong University School of Control Science and Engineering Jinan250100 China

Battery impedance and nonlinearity yield critical insights into dynamic response and electrochemical behavior, which are advantageous for state estimation and degradation diagnostics. However, the characterization method, which can simultaneously provide these two coupled indicators, has yet to be efficiently implemented. In this study, a novel fast characterization method for capturing battery impedance and nonlinearity, which is based on an odd multisine signal with optimized phase configuration, is proposed. A model-based comparative study across four broadband perturbation signals is undertaken to assess the viability of the proposed multisine signal in battery characterization. Furthermore, experimental investigations are conducted on the three-electrode experimental and commercial cylindrical cells to validate the efficacy and reproducibility of the proposed method. The findings demonstrate that the proposed optimized multisine signal, which features a crest factor reduced by 62.4%, achieves an acceptable impedance measurement comparable to the labor-intensive electrochemical impedance spectroscopy, while efficiently capturing battery nonlinearity within a hundred seconds of testing. The SOC dependency of battery characterization indicates that the proposed method is applicable for onboard state estimation and degradation diagnostics through the usage of impedance and nonlinearity. © 1982-2012 IEEE.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Underwater Perception and Autonomous Operation for Underwater Vehicle-Manipulator systems: Methodology and Experiment

引用

IEEE/ASME Transactions on Mechatronics 2025年

作者： Jiang, Chaicheng Xiong, Xinyang Xiang, Xianbo Zeng, Zhigang Zhang, Fumin Huazhong University of Science and Technology School of Artificial Intelligence and Automation Wuhan 430074 China Huazhong University of Science and Technology School of Naval Architecture and Ocean Engineering Wuhan 430074 China Huazhong University of Science and Technology School of Naval Architecture and Ocean Engineering School of Artificial Intelligence and Automation State Key Lab of Intelligent Manufacturing Equipment and Technology Wuhan 430074 China Huazhong University of Science and Technology School of Artificial Intelligence and Automation Key Laboratory of Image Processing and Intelligent Control The Education Ministry of China Wuhan 430074 China Hong Kong University of Science and Technology Department of Electronic and Computer Engineering Clear Water Bay Hong Kong Hong Kong

Camera-equipped underwater vehicle-manipulator systems (UVMS) can achieve autonomous underwater operations through visual servoing. However, current methods excessively rely on auxiliary means for target's visual information and do not sufficiently consider the target's pose when designing visual servoing schemes. As a result, UVMS can only perform dynamic positioning or grasp simple-shaped targets like sea urchins. In this article, we are devoted to making the UVMS autonomously complete more complex underwater operations, such as valve switching and pipe handling. First, an underwater target perception system is proposed to address the issue of discontinuous target position estimation caused by various interferences. Second, a deep neural network-based grasping mechanism controller is proposed to enable the manipulator to grasp targets in various initial poses using the target image. Third, a decoupled visual servoing scheme is proposed for the motion control of the UVMS, and in collaboration with a designed task supervisor to ensure that the UVMS can complete the underwater operation autonomously. To validate the effectiveness of the proposed methods, underwater experiments are conducted based on a UVMS prototype. The UVMS succeeds to autonomously switch different types of valves and handle the pipe. Experiments conducted under dynamic currents validated the reliability and robustness of the proposed methods. © 1996-2012 IEEE.

关键词： Autonomous underwater operations deep neural network underwater vehicle-manipulator systems (UVMS) visual perception visual servoing

来源：评论

学校读者我要写书评

暂无评论

Research on a new hysteresis control technology for flexible high-voltage direct current transmission 2

Research on a new hysteresis control technology for flexible...

引用

2nd IEEE International Conference on automation, electronics and Electrical engineering, AUTEEE 2019

作者： Zhang, Dian Qin, Qingliang Wang, Bo College of Automation Electronic Engineering Qingdao University of Science Technology Qingdao China China National Automation Control System Corp Engineering Department Beijing China

ISBN: (纸本)9781728150291

The nearest level approximation control algorithm (nlm) is employed for multi-level multi-module (mmc) in the flexible high-voltage direct current (hdvc) converter. The decimal part of this algorithm needs to input sine digital pulse width modulator (dpwm), however, since the dpwmis too sensitive and less stable, the output digital pulse becomes too narrow and the digital signal frequency changes too fast. In order to solve the multilevel problems of the inverter frequency operation, the hysteretic Schmidt comparison method is proposed to meet the requirement of precision. This method can not only ensure the stability of the output digital signal, but also can adjust the hysteretic Schmidt trigger threshold, obtain more ideal digital pulse width which reduces the digital signal output frequency and make digital output signals stable and the pulse width, the grading sorting algorithm and guarantee the reduction of the output control pulse frequency. The feasibility of the method is verified through simulation and the actual running results of this method in field-programmable gate array (fpga) show that the study of nlm control algorithm can optimize the flexible hvdc control requirements. © 2019 IEEE.

关键词： HVDC power transmission

来源：评论

学校读者我要写书评

暂无评论

Atmospheric Pressure-Aware Seamless 3-D Localization and Navigation for Mobile Internet Devices

引用

Tsinghua Science and Technology 2012年第2期17卷 172-178页

作者： Nengqiang He Jinhai Huo Yuhan Dong Yipeng Li Yang Yu Yong Ren Department of Electronic Engineering Tsinghua UniversityBeijing 100084China China Electronic System Engineering Corporation(CESEC) Beijing 100141China Department of Automation Tsinghua UniversityBeijing 100084China

This paper describes a seamless three-dimensional （3-D） localization and navigation system for smartphones. The smartphone includes an atmospheric pressure sensor to measure the user＇s altitude that is combined with the outdoor Global Positioning system （GPS） and indoor WiFi-APs localization systems in a seamless 3-D localization system. The smartphone software also provides seamless navigation services by updating map information for both indoor and outdoor locations through the mobile Internet. The indoor floor information calculated from the altitude information is used to project localization anchor nodes, e.g., WiFi-AP, on different floors onto the user＇s floor with an indoor 3-D localization algorithm using projection distances based on a Received Signal Strength （RSS） algorithm. Tests show that the 3-D method reduces systematic errors and achieves much higher accuracy than the traditional two-dimensional localization method.

关键词： 3-D localization and navigation atmospheric pressure mobile smartphone mobile Internet

来源：评论

学校读者我要写书评

暂无评论

View-invariant Gait Authentication Based on Silhouette Contours Analysis and View Estimation

引用

IEEE/CAA Journal of Automatica Sinica 2015年第2期2卷 226-232页

作者： Songmin Jia Lijia Wang Xiuzhi Li College of Electronic Information&Control Engineering Beijing University of Technology Department of Information Engineering and Automation Hebei College of Industry and Technology

In this paper, we propose a novel view-invariant gait authentication method based on silhouette contours analysis and view estimation. The approach extracts Lucas-Kanade based gait flow image and head and shoulder mean shape (LKGFI-HSMS) of a human by using the Lucas-Kanade0s method and procrustes shape analysis (PSA). LKGFI-HSMS can preserve the dynamic and static features of a gait sequence. The view between a person and a camera is identified for selecting the target's gait feature to overcome view variations. The similarity scores of LKGFI and HSMS are calculated. The product rule combines the two similarity scores to further improve the discrimination power of extracted features. Experimental results demonstrate that the proposed approach is robust to view variations and has a high authentication rate. © 2014 Chinese Association of automation.

关键词： Authentication Gait analysis Image analysis Rapid thermal annealing

来源：评论

学校读者我要写书评

暂无评论

AN IMPROVED RAZUMIKHIN-TYPE THEOREM AND ITS APPLICATIONS

引用

IEEE TRANSACTIONS ON AUTOMATIC control 1994年第4期39卷 839-841页

作者： XU, BG LIU, YQ Power System Group Department of Electronic and Electrical Engineering University of Strathclyde Glasgow UK Department of Automation South China University of Technology Guangzhou China

An improved Razumikhin-type theorem is established, and the advantage of the established theorem for reducing conservatism is discussed. For a class of time-delay systems, a simple asymptotic stability condition is deduced as an application of the established theorem. Two illustrative examples are given to show the superiority of our results to those in the literature.

关键词： Asymptotic stability Delay effects Time varying systems automation Lyapunov method Stability analysis Nonlinear systems Linear systems Delay systems Vectors

来源：评论

学校读者我要写书评

暂无评论

Tracking the carbon footprint of global generative artificial intelligence

引用

Innovation 2025年第5期6卷 100866页

作者： Ding, Zhaohao Wang, Jianxiao Song, Yiyang Zheng, Xiaokang He, Guannan Chen, Xiupeng Zhang, Tiance Lee, Wei-Jen Song, Jie State Key Lab of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China National Engineering Laboratory for Big Data Analysis and Applications Peking University Beijing100871 China Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong999077 China Department of Industrial Engineering and Management College of Engineering Peking University Beijing100871 China Jan C. Willems Center for Systems and Control University of Groningen Groningen9700AB Netherlands Energy Systems Research Center University of Texas at Arlington ArlingtonTX76019 United States

来源：评论

学校读者我要写书评

暂无评论

A Comprehensive Study of Algebraic Fault Analysis on PRINCE

引用

China Communications 2015年第7期12卷 127-141页

作者： ZHANG Fan ZHAO Xinjie GUO Shize SHEN Jizhong HUANG Jing HU Zijie College of Information Science and Electrical Engineering Zhejiang University The Institute of North Electronic Equipment System Control Department of No.61541 Unit

PRINCE is a 64-bit lightweight block cipher with a 128-bit key published at ASIACRYPT 2012. Assuming one nibble fault is injected, previous different fault analysis(DFA) on PRINCE adopted the technique from DFA on AES and current results are different. This paper aims to make a comprehensive study of algebraic fault analysis(AFA) on PRINCE. How to build the equations for PRINCE and faults are explained. Extensive experiments are conducted. Under nibble-based fault model, AFA with three or four fault injections can succeed within 300 seconds with a very high probability. Under other fault models such as byte-based, half word-based, word-based fault models, the faults become overlapped in the last round and previous DFAs are difficult to work. Our results show that AFA can still succeed to recover the full master key. To evaluate security of PRINCE against fault attacks, we utilize AFA to calculate the reduced entropy of the secret key for given amount of fault injections. The results can interpret and compare the efficiency of previous work. Under nibble-based fault model, the master key of PRINCE can be reduced to 29.69 and 236.10 with 3 and 2 fault injections on average, respectively.

关键词： algebraic fault analysis PRINCE Crypto Mini SAT

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：