检索结果-内蒙古大学图书馆

China Instrument and control Society (ACCIS), Academic Conference of

作者： Lihua Yuan Jianlong Liu Yishun Jin Key Laboratory of Nondestructive Testing (Ministry of Education) Nanchang Hangkong University Nanchang China Department of Measurement and Control Technology and Instruments School of Testing and Optoelectronic Engineering Nanchang Hangkong University Nanchang China

ISBN: (数字)9798350350326

ISBN: (纸本)9798350350333

The long pulse reflection method was used to detect the internal defects of the impact damage of carbon fiber reinforced plastics. Under the excitation of halogen lamp, the thermal imager synchronized the change of the surface temperature field of the test block and stored in the form of infrared sequence images. In order to improve the imaging quality of infrared images, a variety of infrared sequence image processing algorithms were studied, including polynomial fitting method, robust principal component analysis, independent component analysis and pulse phase method. The performance of each sequence image processing algorithm was quantitatively analyzed by using peak signal-to-noise ratio, root mean square error and entropy. The results show that the image quality evaluation indexes of these four sequence image processing algorithms are better than those of the original image, indicating that these four algorithms are suitable for enhancing the infrared thermal image of impact damage. In particular, the peak signal-to-noise ratio and entropy of the robust principal component analysis enhancement results are optimal among all the processing methods, and the root mean square error is suboptimal.

关键词： PSNR Process control Independent component analysis Fiber reinforced plastics Entropy Polynomials Image sequences Carbon Root mean square Principal component analysis

来源：评论

学校读者我要写书评

暂无评论

Air-Ground Collaborative control for Angle-Specified Heterogeneous Formations

IEEE Transactions on Intelligent Vehicles

引用

IEEE Transactions on Intelligent Vehicles 2024年 1-13页

作者： Chen, Liangming Xiao, Jiaping Teo, Clarence Wei Rui Li, Jianqing Feroskhan, Mir School of System Design and Intelligent Manufacturing and Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen China school of Mechanical and Aerospace Engineering Nanyang Technological University Singapore Singapore College of Communication Engineering Hangzhou Dianzi University Hangzhou China

The need for better search and rescue capabilities has led to the increased demand for collaborative aerial-ground multi-robot deployments. However, most existing solutions require high communication bandwidth or bulky sensor equipment that is not suitable especially for aerial robots. To make the execution of these tasks more efficient, this paper proposes an angle-specified heterogeneous leader-follower formation framework consisting of unmanned aerial vehicles (UAVs) flying in a 3D space and ground robots moving in a 2D plane. The UAVs are controlled to maintain a desired angle-specified formation with the first three UAVs as the leaders forming a triangular shape and the remaining UAVs as the followers. The follower UAVs only need direction measurements to track the leader UAVs. For the ground robots, two leader robots track the UAV group and determine the orientation and scale of the ground formation, while the follower robots track the leader robots using only direction measurements. The proposed heterogeneous formation framework is energy-efficient as most robots only require low-cost and lightweight direction measurements. The stability of the proposed formation control algorithms is proved and validated through various physical application experiments. IEEE

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

Physical layer security verification system based on software defined radio 4

Physical layer security verification system based on softwar...

引用

4th International Conference on Computer Science and communication technology, ICCSCT 2023

作者： Liu, Yonghuang Song, Huanhuan Wen, Hong Yu, Ziyang Li, Wen School of Aeronautics and Astronautics University of Electronic Science and Technology of China Sichuan Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Lab. of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China Intelligent IoT Communication Technology Engineering Research Center of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China

ISBN: (纸本)9781510671232

Compared with traditional encryption technology, physical layer security technology uses channel noise to realize the key with the same length as plaintext. Even if the eavesdropper has strong cracking computing power, it cannot decipher the confidential data without the key, which can truly realize "One-Time-Pad" and ensure the security of wireless communication. In this paper, we propose a physical layer security verification system based on software defined radio. In the system, base stations and legitimate users can obtain channel information efficiently, and eavesdroppers can use the powerful storage and computing resources of the cloud server to decrypt confidential signals without time constraints. Based on the system, this paper designs and verifies the physical layer security scheme with joint precoding and Artificial Noise, which fills the gap of the prototype verification platform of information-theoretic security and provides strong support for verifying the unconditional security features of the physical layer security technology. © 2023 SPIE.

关键词： Verification

来源：评论

学校读者我要写书评

暂无评论

Research on UDE control based on load torque compensation of PMSM 5

Research on UDE control based on load torque compensation of...

引用

2021 5th International Conference on Electrical, Mechanical and Computer engineering, ICEMCE 2021

作者： Yan, Hongliang Zhai, Weizhi Geng, Yan Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells School of Electric Engineering Xi'an Shiyou University Shaanxi Xi'an710065 China

In order to solve the problem that the traditional uncertainty and disturbance estimator (UDE) control needs to increase the filter order to keep good performance when facing rapid disturbance changes,thus lead to cost increase in implementing the system, a speed control strategy of permanent magnet synchronous motor (PMSM) driver based on reduced order observer compensation is proposed. The designed control strategy is robust to the system with internal parameter variation and external torque disturbance. Through the compensation of load torque, the pressure of UDE controller is relieved, and then the tracking error of high-frequency component in load torque is eliminated, and the control performance of the system is improved more effectively. This paper proves the superiority of the new compound controller through comparison of simulation results. © 2021 Institute of Physics Publishing. All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Stabilization of Port-controlled Hamiltonian systems subject to exogenous disturbances via compensation control approach

Stabilization of Port-Controlled Hamiltonian systems subject...

引用

Data Driven control and Learning Systems (DDCLS)

作者： Baozeng Fu Qingzhi Wang Yongchao Liu Shandong Key Laboratory of Industrial Control Technology School of Automation Qingdao University Qingdao China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing China

The stabilization of Port-controlled Hamiltonian (PCH) systems under exogenous disturbances by designing a compensation control approach is studied in the paper. Firstly, a baseline feedback control is proposed utilizing the damping injection method. To estimate disturbances, then a novel exogenous disturbance observer is constructed, based on which a feedforward compensation control is developed. Next, a composite control law is proposed based on the feedforward compensation and the feedback control. For the Hamiltonian system, an asymptotic stability analysis is followed finally. The feasibility of the compensation control strategy is revealed by a numerical simulation example.

关键词：

来源：评论

学校读者我要写书评

暂无评论

USRP-based real-time experimentation platform for artificial-noise-aided MIMO system 4

USRP-based real-time experimentation platform for artificial...

引用

4th International Conference on Computer Science and communication technology, ICCSCT 2023

作者： Yu, Ziyang Song, Huanhuan Wen, Hong Liu, Yonghuang Li, Wen Hou, Wenjing School of Aeronautics and Astronautics University of Electronic Science and Technology of China Sichuan Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Lab. of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China Intelligent IoT Communication Technology Engineering Research Center of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China

ISBN: (纸本)9781510671232

Artificial noise, as a physical layer security technique, differs from traditional communication security mechanisms based on cryptography as it cannot be easily cracked by rapidly developing computational power. The theoretical research on the security of artificial-noise-assisted MIMO (Multiple-Input Multiple-Output) communication systems is quite comprehensive. However, the practical effectiveness of artificial noise in real-world systems still needs to be further validated through experimentation. This paper proposes a real-time platform for simulating experiments on MIMO communication systems assisted by artificial noise. By analyzing experimental data, it demonstrates that artificial noise has a slight impact on the reliability of legitimate MIMO communication systems while effectively enhancing system security. © 2023 SPIE.

关键词： MIMO systems

来源：评论

学校读者我要写书评

暂无评论

Energy efficient resource allocation and trajectory optimization in UAV-assisted mobile edge computing system 7

Energy efficient resource allocation and trajectory optimiza...

引用

7th International Conference on Big Data Computing and communications, BigCom 2021

作者： Chen, Shuaibing Shi, Lei Ding, Xu Lv, Zengwei Li, Zhehao HeFei University of Technology School of Computer Science and Information Engineering Hefei230009 China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei230009 China

ISBN: (纸本)9781665442527

Mobile edge computing(MEC) has been considered as a promising technology with the ever-increasing computation demands, which offloads computation-intensive tasks to MEC servers to meet the low latency and high bandwidth requirements of the tasks. But considering the dynamic UEs, nonuniform distribution of task requests and the limitation of the dynamic of the fixed deployment of the edge severs, we investigate a Unmanned Aerial Vehicles (UAVs)-assisted edge computing system in this paper, where each UAV is equipped with server to assist local edge servers. Utilizing the mobility of UAVs provides flexible edge computing services. In this model, tasks are executed on the local edge server first. When the computing resources of the local edge server cannot meet the computational requirements of the task, the system will dispatch the UAVs. Task will be offloaded to UAV for execution. Considering that the endurance of UAVs is a tough problem under the current technical level. Our aim is to minimize the energy consumption of UAVs under the premise of satisfying the UEs demands as much as possible to achieve a higher resource utilization rate. We propose Tasks Offloading Policy Algorithm(TOPA) and Online UAVs Dispatching Base on the Shortest Distant Algorithm(ODSH). Simulation results show the effectiveness of the proposed of algorithms. © 2021 IEEE.

关键词： Energy utilization

来源：评论

学校读者我要写书评

暂无评论

Bearing remaining useful life prediction using spatial-temporal multiscale graph convolutional neural network

引用

measurement Science and technology 2023年第8期34卷 085009-085009页

作者： Yang, Xiaoyu Li, Xinye Zheng, Ying Zhang, Yong Wong, David Shan-Hill The Belt and Road Joint Laboratory on Measurement and Control Technology School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China School of Information Science and Engineering Wuhan University of Science and Technology Wuhan430081 China Department of Chemical Engineering National Tsing-Hua University Hsin-Chu Taiwan

Remaining useful life (RUL) prediction of bearings is important to guarantee their reliability and formulate a maintenance strategy. Recently, deep graph neural networks (GNNs) have been applied to predict the RUL of bearings. However, they usuallylack dynamic features, use manual stage identification, and experience the over-smoothing problem, which will have a negative effect on the prediction accuracy. This paper proposes a new framework for bearing RUL prediction based on spatial-temporal multi-scale graph convolutional neural network (STMSGCN), which can improve the accuracy of prediction by solving the above-mentioned problems. Specifically, different to the most-used static feature of bearings, a dynamic feature that can capture the time-varying change of vibration energy is proposed. A sliding window alarm method is proposed to detect the fault occurrence time (FOT), which can offer an accurate healthy stage rather than human-defined methods. Then, the STMSGCN is proposed to predict the RUL of bearings, which solves the over-smoothing problem of the deep GNN model. The PRONOSTIA platform is adopted to verify the proposed method. The results verify that the sliding window alarm method can detect the FOT faster for slowly degrading bearings, and the proposed STMSGCN structure gives higher prediction accuracy compared to the existing methods. © 2023 IOP Publishing Ltd

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Perceptual Attribute Analysis of Objective Acoustic Parameters of Musical Instrument Timbre

Perceptual Attribute Analysis of Objective Acoustic Paramete...

引用

2021 International Conference on Culture-Oriented Science and technology, ICCST 2021

作者： Liu, Jingyu Chen, Yuqu Ran, Can Huang, Yongzhan Jiang, Wei Ministry of Culture and Tourism Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Beijing China Communication University of China School of Information and Communication Engineering Beijing China

ISBN: (纸本)9781665442541

The timbre attributes are affected by multiple factors such as the time domain, frequency domain, time-frequency domain, and harmonic structure of the sound signal, and there is a certain degree of correlation and redundancy among the objective acoustic parameters. Analyzing the perception of the objective acoustic parameters of the timbre Attributes is of great significance to the study of timbre perception. In order to achieve the above goals, this paper constructs a timbre database of Chinese and Western musical monophonic instruments, and extracts 45 timbre objective acoustic parameters based on this database. through factor analysis of these acoustic parameters, it shows that the Information of 45 timbre objective acoustic parameters can be condensed into 6 factors, and each factor has a clear timbre perception attribute. Based on this result, we use the multi-dimensional scale analysis method to verify the six factors, and the verification results are basically consistent with the factor analysis results. The 6 factors constructed can explain the time-frequency domain distribution, structure and energy distribution of acoustic parameters, and provide a theoretical basis for constructing an interpretable model based on audio objective acoustic parameters. © 2021 IEEE.

关键词： Multivariant analysis

来源：评论

学校读者我要写书评

暂无评论

Design and Implementation of a Scattered Wireless Spectrum Sensor Network System 4

Design and Implementation of a Scattered Wireless Spectrum S...

引用

4th IEEE International Conference on Electronics technology, ICET 2021

作者： Zhang, Ke Fu, Cheng Niu, Yong Yang, Shuangmao Liu, Jieyan University of Electronic Science and Technology of China Science and Technology on Electronic Information Control Laboratory School of Computer Science and Engineering Chengdu China University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu China

ISBN: (纸本)9781728176734

With the increasing shortage of wireless spectrum resources, it is urgent to monitor and utilize the limited wireless spectrum resources rationally. In this paper, a scattered wireless spectrum sensor network system is proposed and applied to electromagnetic spectrum monitoring in a city environment. We design a wireless spectrum sensor node and wireless spectrum sensor network, then develop a city wireless spectrum monitoring software system. We describe the network architecture and software design process in detail and then design several experiments to test the system. The results show that our system can satisfy the electromagnetic spectrum environment monitor requirements. © 2021 IEEE.

关键词： Zigbee

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：