检索结果-内蒙古大学图书馆

7th International Symposium on system and Software Reliability, ISSSR 2021

作者： Qiu, Yueyou Fang, Junchu Zhu, Zhilong Ministry of Education College of Electrical Engineering Anhui Polytechnic University Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Wuhu China

ISBN: (纸本)9781665434317

Anti-lock braking system (ABS) can prevent the situation of front and rear wheels locked. However, the car having only ABS is not enough. For example, the distribution of braking force in the early stage of the car braking, and the car in the wet road starting acceleration. In the situation, the car requires ABS and other control systems of the car work together. In this paper, the electronic braking force distribution device (EBD) is integrated into the ABS to form the ABS/EBD braking system based on CAN bus. It consists of speed sensor, CAN bus, control unit and braking force distribution device. The system is used to improve the directional stability of braking before the ABS system starts. By measuring the slip rate of four wheels, the degree of locking is judged, so that the slip rate of four wheels is close, so that all wheels can be locked at the same time as much as possible. Compared with other braking force distribution systems, the system is characterized by the use of CAN bus as the carrier, which effectively improves the system's response ability and computing ability. It is also convenient to combine with other electronic systems on the car to form the intelligent network of the car. © 2021 IEEE.

关键词： Wheels

来源：评论

学校读者我要写书评

暂无评论

An Optimized Design of an Electric Vehicle Wireless Charging Coupling Coil 4

An Optimized Design of an Electric Vehicle Wireless Charging...

引用

2021 4th International Conference on Mechanical, Electrical and Material Application, MEMA 2021

作者： Xie, Wei Chen, Qi-Gong Lei, Shou-Zhong Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education Anhui Polytechnic University Anhui Province Wuhu241000 China

With the development of electric vehicle wireless charging technology, the transmission power and transmission efficiency of electric vehicle wireless charging system have become the focus of current research. The transmission power and efficiency of wireless charging system largely depend on the energy loss of two resonant coupling coils. The energy loss is mainly related to the structural parameters of the coupling coil and the coupling coefficient of the two coils. On this basis, the structure of the coupling coil is designed and optimized by using the finite element analysis software Maxwell, and a new combined transmitting coil structure is designed. Experiments and verification show that the coil design meets the requirements of transmission efficiency, which can provide a reference for the design of wireless charging coil of electric vehicle in the future. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Vehicle transmissions

来源：评论

学校读者我要写书评

暂无评论

Distributed Neighbor Selection on Matrix-weighted Networks

Distributed Neighbor Selection on Matrix-weighted Networks

引用

Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Haoyu Wei Lulu Pan Haibin Shao Dewei Li Department of Automation and 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

This paper explores distributed neighbor selection in matrix-weighted networks, where a matrix-valued weight captures the interdependencies among agents’ states. We demonstrate the feasibility of preserving and, in certain cases, improving the convergence rate of matrix-weighted networks by having agents exclusively engage with a subset of their neighbors. Leveraging the inherent monotonicity of Laplacian matrix eigenvectors, we introduce a novel neighbor selection criterion that reduces network connections while enhancing convergence rates. Existing neighbor selection strategies often require acquiring information from all nodes before making decisions. In order to propose a distributed neighbor selection strategy for matrix-weighted networks, we establish a numerical relationship between Laplacian eigenvectors and a locally measurable metric. In essence, this paper extends prior findings from scalar-weighted networks to matrix-weighted networks.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Designing Cluster Consensus on Higher-Order Interaction Networks

Designing Cluster Consensus on Higher-Order Interaction Netw...

引用

IEEE Conference on Decision and control

作者： Haoyu Wei Lulu Pan Haibin Shao Dewei Li Wenbin Yu Shibei Xue Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China

This paper examines the cluster consensus design problem on higher-order interaction networks. Specifically, the higher-order interaction mechanism is captured by matrix-weighted networks that allow the interdependency across the dimensions of the agents' states, and the matrix-valued weight matrices $A_{ij}\in \mathbb{R}^{d\times d}$ associated with specific edges are further assumed to share the same nullspace for design purposes. Under mild assumptions on network connectivity, we first examine the case that the nullspace of positive semi-definite edges is spanned by a nonzero vector $\boldsymbol{\xi}\in \mathbb{R}^{d}$ and show that the predictable cluster consensus can be achieved, which is eventually located in the 1-dimensional linear space determined by span $\{\boldsymbol{\xi}\}$ and the average of agents' initial states. Moreover, the transient state of agents in each cluster can also be explicitly characterized. Namely, the derivative of the average state of agents in each cluster is perpendicular to span $\{\boldsymbol{\xi}\}$ . To generalize the above results, we proceed to examine the case that the nullspace of positive semi-definite edges is spanned by more than one linearly independent $d$ -dimensional vector, in which case, analogous results can be obtained, and the explicit geometric interpretation is also provided.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Real-time Grid Impedance Identification for Synchronization Stability control in Grid-following Converter 5

Real-time Grid Impedance Identification for Synchronization ...

引用

5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Cheng, Liang Ye, Hua Wang, Ting Dong, Xin Li, Yanran Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Shandong Electric Power Co. Ltd Jinan China State Grid Jinan Power Supply Company Jinan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

The synchronization instability is one of the serious problems for grid-following converter (GFL). Real-time identification of AC grid impedance enables improves the application of adaptive current injection synchronous stabilization control method in practical power systems. In this paper, a Thevenin equivalent (TE) impedance identification method using Fast Fourier Transform (FFT) analysis is proposed and applied to GFL synchronous stability control. First, according to the analysis of the static and dynamic instability mechanism of phase-locked loop (PLL), the necessity of impedance identification is explained. Then, using FFT analysis, the TE impedance of the AC system is calculated in real-time. Finally, the estimated TE parameters are used to determine the current references of GFL during the fault to ensure that no loss of synchronization (LOS) occurs in the GFL. The simulation results show that the proposed identification method can quickly track the AC grid impedance changes of system after a fault, and can be used in the adaptive current control strategy. © 2022 IEEE.

关键词： Fast Fourier transforms

来源：评论

学校读者我要写书评

暂无评论

Leader-Following Entrapping control of AUVs Using Bearing Measurements in Local Coordinate Frames

引用

Guidance, Navigation and control 2022年第4期2卷 85-121页

作者： Yingbo Fu Ziwen Yang Shanying Zhu Cailian Chen Department of Automation Shanghai Jiao Tong UniversityShanghai 200240P.R.China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240P.R.China Shanghai Engineering Research Center of Intelligent Control and ManagementShanghai 200240P.R.China

In this paper,the entrapping control problem of discrete-time AUVs with local coordinate frames is *** achieve entrapment in arbitrarily shaped orbits and formations,we design a bearingbased leader-following framework fully in the discrete-time domain with four parts:the orientation estimation unit,estimator unit,controller unit and parameters tuning *** bearing measurements and communication information,the orientation estimation unit can estimate orientations of local coordinate frames infinite time,and the estimator unit can achieve local *** on estimation,the controller unit can drive each AUV to track the desired orbit or formation with an arbitrary *** present su±cient conditions under which stability of the overall system is proved using the theorem offinite-time stability and LaSalle's theorem for the discrete-time ***,the parameters tuning unit can calculate optimal parameters to improve overall ***,we extend our schemes to nonholonomic AUVs with unicycle ***,simulation results demonstrate the effectiveness of the proposed scheme.

关键词： Entrapping control discrete-time AUVs bearing measurements local coordinate frames

来源：评论

学校读者我要写书评

暂无评论

Screening of Areas with High Risk of Short-Circuit Current Exceedance in Power systems with Renewable Energy Integration

Screening of Areas with High Risk of Short-Circuit Current E...

引用

IEEE Asia Power and Energy Engineering Conference (APEEC)

作者： Jian Wang Haoran Chen Hang Qi Changgang Li Wei Dong Yi Lu Wen Hua Zhengyang Zhou Longfei Wang Ying Cheng Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Zhejiang Electric Power Co. Ltd. Research Institute Hangzhou China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

The efficient short circuit calculation is the basis of short circuit current control. Commonly, the iterative calculation method of short-circuit current is adopted in power systems containing renewable energy sources. However, the detailed short-circuit current screening for all areas in power systems is time-consuming. To address this problem, this paper proposes an efficient screening method for areas with high risk of short-circuit current exceedance. Firstly, this paper builds the short-circuit models of synchronous generator and renewable energy source. Then, an efficient approximate calculation method of the maximum short-circuit current is proposed. Finally, a screening method for high-risk areas with short-circuit current exceeding limit is proposed, and an index of screening performance is defined. The validity of the proposed method is verified with a modified New England 39-bus power system.

关键词： Electrical engineering Renewable energy sources Power transmission lines Short-circuit currents Asia Synchronous generators Power systems

来源：评论

学校读者我要写书评

暂无评论

Prediction and Preventive control Scheme for Wind and PV Power Ramp Events

Prediction and Preventive Control Scheme for Wind and PV Pow...

引用

IEEE International Conference on Power and Power and Renewable Energy (ICPRE)

作者： Yifei Zhai Zengwei Wang Kunpeng Zhang Huan Ma Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Power Grid Technology Center State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

As the large scale integration of photovoltaic and wind power into the grid increases, renewable energy ramp events have become a potential threat to the secure operation of the power grid. To effectively address renewable energy power ramp events, this paper proposes a prediction and preventive control scheme. First, a rolling warning approach is achieved by the long short-term memory network and fuzzy logic, which provides warning levels and guides decision-making for preventive control. Second, a two-stage optimization scheduling model is proposed, including a day-ahead and an intra-day sub-model. The two-stage scheduling model comprehensively considers power support from interconnectors and preventive control costs. Simulation results demonstrate that the proposed scheme can provide adaptive preventive control strategies for power ramp events with varying risk levels, thereby enhancing the utilization of renewable energy and improving the security of power system.

关键词： Photovoltaic systems Renewable energy sources Adaptation models Costs Simulation Decision making Power system stability Wind power generation Wind forecasting Transient analysis

来源：评论

学校读者我要写书评

暂无评论

A 4-Channel Ultrafast Wavelength-Swept REC-DFB Laser Array for Fiber Bragg Grating Interrogation

A 4-Channel Ultrafast Wavelength-Swept REC-DFB Laser Array f...

引用

2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Meng, Lingxin Dai, Pan Ban, Qilu Xu, Kaichuan Wang, Jiacheng Li, Zhen Wang, Feng Zeng, Jie Li, Shaobo Ma, Xiang Chen, Xiangfei Res. Center of Precision Photonics Integration and System Application of the Ministry of Education College of Engineering and Applied Sciences Nanjing University Key Lab. of Intelligent Optical Sensing and Manipulation of the Ministry of Education Engineering National Laboratory of Solid State Microstructures Nanjing210023 China Nanjing University of Aeronautics and Astronautics State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing210016 China The 54th Research Institute of China Electronics Technology Group Corporation Optical Communication Research and Development Center Shijiazhuang050081 China

ISBN: (纸本)9798350312614

We present a four-channel ultrafast wavelength-swept distributed feedback (DFB) semiconductor laser array based on the reconstruction-equivalent-chirp (REC) technique using instantaneous injection current modulation. With the aid of our designed laser driving circuit system consists of the microcontroller unit (MCU), field-programmable gate array (FPGA) and negative metal-oxide-semiconductor field effect transistors (n-MOSFETs), the precise pulse driving current for the 4-channel wavelength-swept REC-DFB laser array can be generated and a fast tuning of 16.424 nm within 10 μs is achieved. To further investigate the tuning performance of the proposed wavelength-swept laser source, we then applied it to the fiber Bragg grating (FBG) interrogation system and four FBG temperature sensor arrays were successfully demodulated. The development of high-efficient optical sensing systems heavily relies on the significance of the ultrafast wavelength-swept laser source, which has the potential to greatly enhance FBG interrogator performance in the future. © 2023 IEEE.

关键词： DFB laser array fast wavelength-swept fiber Bragg grating interrogation REC technique

来源：评论

学校读者我要写书评

暂无评论

Super-bunching light with giant high-order correlations and extreme multi-photon events

arXiv

引用

arXiv 2024年

作者： Qin, Chengbing Li, Yuanyuan Yan, Yu Li, Jiamin Li, Xiangdong Song, Yunrui Zhang, Xuedong Han, Shuangping Liu, Zihua Guo, Yanqiang Zhang, Guofeng Chen, Ruiyun Hu, Jianyong Yang, Zhichun Liu, Xinhui Xiao, Liantuan Jia, Suotang State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser Spectroscopy Shanxi University Shanxi Taiyuan030006 China Collaborative Innovation Center of Extreme Optics Shanxi University Shanxi Taiyuan030006 China Department of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Shanxi Taiyuan030024 China

Non-classical light sources emitting bundles of N-photons have essential applications ranging from fundamental tests to quantum information processing. However, high-order correlations, g(N)(0) (N≥2), are still limited to hundreds. Herein, we report the realizaiton of a super-bunching laser in a photonic crystal fiber with g(2)(0) reaching 5.86×104 and g(5)(0) reaching 2.72×108. This laser presented extreme photon-number fluctuations and ubiquitous multi-photon events, with the occurrence of 31 photons from a single light pulse at a mean of 1.99×10-4 photons per pulse. The probability of this extreme event has been enhanced 10139 times compared to a coherent laser with a Poissonian distribution. By varying the power of the pumping laser, both the photon number distributions and the corresponding high-order correlations could be substantially tailored from Poissonian to super-bunching distributions. Our study showcases the ability to achieve non-classical laser with giant high-order correlations and extreme photon-number fluctuations, paving the way for high-order correlation imaging, extreme nonlinear optical effects, hyperspectral image and multi-photon physics. © 2024, CC BY.

关键词： Photonic crystal fibers

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：