检索结果-内蒙古大学图书馆

Chinese Automation Congress (CAC)

作者： Jun Jiang Chengsheng Wang Wei Duan Zhiming Lan Fan Li Qiongtao Yang Automation Research and Design Institute of Metallurgical Industry Beijing China National Key Laboratory of Metallurgical Intelligent Manufacturing System Beijing China Beijing Aritime Intelligent Control CO. LTD. Beijing China

Permanent magnet synchronous motor (PMSM) has the characteristics of high efficiency, large rotational inertia, and fast dynamic response. In recent years, the speed sensorless control technology of PMSM has significant advantages, such as reduced costs, smaller volume, and enhanced system anti-interference. Therefore, it has become a research hotspot. This article relies on a set of 50kw AC-DC-AC SiC inverter, adopts a composite control strategy, and focuses on the optimized control method of PMSM without speed sensors at low, medium and high speeds. With the help of high-performance digital signal processor DSP28335, the switching of two control methods can be achieved and the system experiment in the full speed domain is completed. The experimental results are basically consistent with the measured values of the speed encoder. This verifies the effectiveness and accuracy of the speed sensorless control algorithm which has good theoretical guidance significance for engineering applications.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Road Damage Detection and Classification Based on Multi-Scale Contextual Features

Road Damage Detection and Classification Based on Multi-Scal...

引用

2022 IEEE International Conference on Big Data, Big Data 2022

作者： Yang, Lu He, Hualin Liu, Tao Tianjin University of Technology Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin300384 China Tianjin University of Technology National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin300384 China

ISBN: (纸本)9781665480451

Road damage detection is particularly essential for improving road traffic safety. Existing methods do not perform well due to complex road conditions and sparse features contained in road damage. Therefore, we propose a new road damage detection network - YPLNet, which could obtain more refined multi-scale contextual features. Specifically, the network proposed in this paper is based on YOLOv5, by adding the PSA module to the backbone network, the spatial information of the feature map at multi-scale is obtained to enrich the feature space, and the long-term information dependence between channels is further constructed. In addition, in the feature fusion stage, the LCFI module is utilized to obtain contextual features under the multi-scale receptive fields, and these contextual features include rich low-level and high-level information. Our proposed network achieves a Mean-F1 Score of 0.635 in the competition. The source code and model are publicly available at https://***/hehualin-tut/YPLNet © 2022 IEEE.

关键词： Damage detection

来源：评论

学校读者我要写书评

暂无评论

Network Learning from Best-Response Dynamics in LQ Games

Network Learning from Best-Response Dynamics in LQ Games

引用

American Control Conference (ACC)

作者： Yijun Chen Kemi Ding Guodong Shi Australian Centre for Field Robotics the University of Sydney Sydney Australia School of System Design and Intelligent Manufacturing Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems and the Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and Technology Shenzhen China

In this paper, we focus on network structure inference problem for linear-quadratic (LQ) games from best-response dynamics. An adversary is considered to have no knowledge of the game network structure but have the ability to observe all players’ best-response actions and manipulate some players’ actions. This work presents a comprehensive framework for network learning from best-response dynamics in LQ games. First of all, we establish theoretic results that characterize network structure identifiability and provide numerical examples to demonstrate the usefulness of our theoretic results. Next, in the face of the inherent stability and sparsity constraints for the game network structure, we propose an information-theoretic stable and sparse system identification algorithm for learning the network structure. Finally, the effectiveness of the proposed learning algorithm is tested. The connection between network structure inference problem and classical system identification theory is covered by our work, which advances the literature.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Collaborative Fall Detection and Response Using Wi-Fi Sensing and Mobile Companion Robot

Collaborative Fall Detection and Response Using Wi-Fi Sensin...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Yunwang Chen Yaozhong Kang Ziqi Zhao Yue Hong Lingxiao Meng Max Q.-H. Meng Shenzhen Key Laboratory of Robotics Perception and Intelligence Southern University of Science and Technology Shenzhen China Department of Electrical and Electronic Engineering SUSTech Shenzhen China School of System Design and Intelligent Manufacturing SUSTech Shenzhen China

ISBN: (数字)9798331509644

ISBN: (纸本)9798331509651

This paper presents a collaborative fall detection and response system integrating Wi-Fi sensing with robotic assistance. The proposed system leverages channel state information (CSI) disruptions caused by movements to detect falls in non-line-of-sight (NLOS) scenarios, offering non-intrusive monitoring. Besides, a companion robot is utilized to provide assistance capabilities to navigate and respond to incidents autonomously, improving efficiency in providing assistance in various environments. The experimental results demonstrate the effectiveness of the proposed system in detecting falls and responding effectively.

关键词： Navigation Biomimetics Collaboration Robot sensing systems sensors Fall detection Wireless fidelity Monitoring Injuries Channel state information

来源：评论

学校读者我要写书评

暂无评论

design, Modeling and Experiment of an Eccentric Mass-driven Spherical Robot

Design, Modeling and Experiment of an Eccentric Mass-driven ...

引用

design Science (ICDS), International Conference on

作者： Han Mao Tongtong Xie Aibin Zhu Di Zhang Xinyu Wu Cheng Li Xin Wang Institute of Robotics & Intelligent Systems Xi’an Jiaotong University Xi’an China Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Xi’an China School of Construction Machinery Chang’an University Xi’an China

ISBN: (数字)9798350376289

ISBN: (纸本)9798350376296

The spherical robot's hermetically sealed spherical housing renders it flexible and capable of functioning continuously in harsh weather conditions and challenging environments. In order to address the issue of insufficient climbing ability of spherical robots, a single eccentric mass-driven spherical robot was designed. The climbing process of a spherical robot was subjected to analysis, with particular attention paid to the mass distribution of the robot's spherical shell and internal structure. A kinematics model and a dynamics model were developed to decompose the robot's motion into linear and steering motions. The mass size and swing amplitude of the eccentric mass are the key factors affecting the motion performance and stability of the spherical robot, and the swinging process of the heavy pendulum with different eccentric masses is analyzed. The experimental results indicate that the robot has a minimum turning radius of 0.5 m and is capable of climbing slopes with a gradient of 12°. The maximum error in the speed control of the spherical robot is 0.3314 rad/s.

关键词： Robot motion Dynamics Velocity control Kinematics Turning Mathematical models Stability analysis Robots Testing Meteorology

来源：评论

学校读者我要写书评

暂无评论

Deep Learning-Enabled ISAC-OTFS Pre-equalization design for Aerial-Terrestrial Networks

arXiv

引用

arXiv 2024年

作者： Wang, Weihao Guo, Jing Wang, Siqiang Wang, Xinyi Yuan, Weijie Fei, Zesong the School of Information and Electronics Beijing Institute of Technology Beijing100081 China the School of System Design and Intelligent Manufacturing The Shenzhen Key Laboratory of Robotics and Computer Vision Southern University of Science and Technology Shenzhen518055 China

Orthogonal time frequency space (OTFS) modulation has been viewed as a promising technique for integrated sensing and communication (ISAC) systems and aerial-terrestrial networks, due to its delay-Doppler domain transmission property and strong Doppler-resistance capability. However, it also suffers from high processing complexity at the receiver. In this work, we propose a novel pre-equalization based ISAC-OTFS transmission framework, where the terrestrial base station (BS) executes pre-equalization based on its estimated channel state information (CSI). In particular, the mean square error of OTFS symbol demodulation and Cramér-Rao lower bound of sensing parameter estimation are derived, and their weighted sum is utilized as the metric for optimizing the pre-equalization matrix. To address the formulated problem while taking the time-varying CSI into consideration, a deep learning enabled channel prediction-based pre-equalization framework is proposed, where a parameter-level channel prediction module is utilized to decouple OTFS channel parameters, and a low-dimensional prediction network is leveraged to correct outdated CSI. A CSI processing module is then used to initialize the input of the pre-equalization module. Finally, a residual-structured deep neural network is cascaded to execute pre-equalization. Simulation results show that under the proposed framework, the demodulation complexity at the receiver as well as the pilot overhead for channel estimation, are significantly reduced, while the symbol detection performance approaches those of conventional minimum mean square error equalization and perfect CSI. Copyright © 2024, The Authors. All rights reserved.

关键词： Channel estimation

来源：评论

学校读者我要写书评

暂无评论

Nonlinear vibration mechanism of elastic beam in large overall rotation with rotor eccentricity effect

Nonlinear vibration mechanism of elastic beam in large overa...

引用

2021 International Conference on Mechanical Engineering, intelligent Manufacturing and Automation Technology, MEMAT 2021

作者： Zhao, Lei Yan, Zhao-Fang Zhao, Xin-Hua Li, Bin Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin China Tianjin China School of Mechanic Engineering Tianjin University of Technology Tianjin China

The eccentric effect of rotor has seriously affected on the stability and precision of the mechanism at high speed for light and flexible mechanism in industrial application. The analysis of nonlinear vibration mechanism must be completed to realize precision and stable control of elastic beam in a large overall rotation. Firstly, the slender flexible rod is assumed as Euler-Bernoulli beam. We apply the deformation theory of elastic beam to establish its kinematic constraint relationship. Its dynamic model is built with Galerkin method and Hamilton principle. Then the Lagrange method is used to establish the rotor dynamics model based on the Jeffcott rotor. The coupling part between the motor and the elastic beam is assumed to be rigidly connected, and the dynamic model of the motor-elastic beam system can be obtained. Lastly, we analyze the nonlinear vibration mechanism of the elastic beam with rotor eccentricity effect through applying the fourth-order Runge-Kutta method and the superposition principle of traveling wave. It provides an important theoretical basis for making an effective vibration suppression strategy for elastic beam. © Published under licence by IOP Publishing Ltd.

关键词： Dynamic models

来源：评论

学校读者我要写书评

暂无评论

Reform of experimental teaching by integrating virtual simulation and remote control 23

Reform of experimental teaching by integrating virtual simul...

引用

8th International Conference on Distance Education and Learning, ICDEL 2023

作者： Hu, Wenhua He, Yuncheng Li, Jing Chen, Wei Wu, Ruiqin Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology China Research Center for Wind Engineering and Engineering Vibration Guangzhou University China Smart City College Beijing Union University China

ISBN: (纸本)9798400700422

Remote online experimental system is the inevitable trend of experimental teaching in the future. Compared with the traditional offline experimental mode, the online experimental system has better operability and more intuitive teaching significance. It can carry out experiments anytime and anywhere without many actual environmental restrictions, saving the time of teachers and students. The number of students in an online class is far more than the number of offline experiments, which can improve teachers' teaching efficiency and teaching quality. This paper will start from an experimental example, design the simulation system based on Automation Studio (AS) and build the actual system based on WS290 hydraulic experimental rig, and then design the image recognition remote control program, and let users achieve the purpose of experimental teaching and control through the program. © 2023 ACM.

关键词： Remote control

来源：评论

学校读者我要写书评

暂无评论

design of Planar Inverted-F Antenna (PIFA) for 5G Communication Indoor Micro-base station 13

Design of Planar Inverted-F Antenna (PIFA) for 5G Communicat...

引用

13th International Conference on Microwave and Millimeter Wave Technology, ICMMT 2021

作者： Yang, Zhourui Wu, Bo Kong, Meng Zhang, Liang Li, Xianghui Wu, Xianliang Ministry Of Education Anhui University Key Laboratory Of Intelligent Computing Signal Processing Hefei230039 China Hefei Normal University Anhui Province Key Laboratory Of Simulation And Design For Electronic Information System Hefei230601 China

ISBN: (纸本)9781665434379

In this paper, a planar inverted F antenna is designed for indoor distributed micro-base station of 5G communication. The overall size of the antenna is 16 mm × 15.3 mm × 10 mm, and the antenna works in the 3.5 - 3.6 GHz, which band number named n78. The antenna has the advantages of miniaturization, easy machining and convenient installation. The simulation results of ANSYS HFSS 2020 shows that in the working bandwidth range, when the central frequency of the designed antenna is 3.55 GHz, the S11 is -23.6 dB, and the VSWR is 1.1, which meets the requirements of impedance matching. In terms of directivity, the antenna coverage also meets the requirements of 5G micro-base station. © 2021 IEEE.

关键词： Base stations

来源：评论

学校读者我要写书评

暂无评论

Collaborative Fall Detection and Response using Wi-Fi Sensing and Mobile Companion Robot

arXiv

引用

arXiv 2024年

作者： Chen, Yunwang Kang, Yaozhong Zhao, Ziqi Hong, Yue Meng, Lingxiao Meng, Max Q.-H. The Shenzhen Key Laboratory of Robotics Perception and Intelligence Southern University of Science and Technology Shenzhen518055 China The Department of Electrical and Electronic Engineering SUSTech Shenzhen China The School of System Design and Intelligent Manufacturing SUSTech Shenzhen China

关键词： Fall detection

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：