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International Conference on Information Science and Technology (ICIST)

作者： Qingshan Liu Wei Zhang Jiang Xiong Bingrong Xu Long Cheng School of Mathematics Southeast University Nanjing China College of Computer Science and Engineering Chongqing Three Gorges University Chongqing China School of Automation Huazhong University of Science and Technolog< Wuhan China State Key Lab. of Management and Control for Complex Systems University of Chinese Academy of Sciences Beijing China

In this paper, a projection-base algorithm is proposed for solving the constrained L 1 -minimization problem. Furthermore, the algorithm is utilized to sparse signal reconstruction. The L 1 -minimization is first converted into some equations which are described by the projections onto a hyper box set and the nonnegative quadrant. Then a iterative algorithm is proposed for solving the L 1 -minimization problem. Next, the algorithm is applied to sparse signal reconstruction described as an L 1 -minimization problem subject to L ∞ -norm noise constraint, or equivalently bound constraint. Finally, several experiments are presented to show the performance of the proposed algorithm.

关键词： Signal processing algorithms Signal reconstruction Optimization Convergence Electronic mail Recurrent neural networks Lyapunov methods

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A less-conseryative robust H∞ guaranteed cost fault-tolerant control of networked control system

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Kongzhi yu Juece/control and Decision 2011年第12期26卷 1768-1776页

作者： Li, Wei Wang, Yan-Fei College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou 730050 China Gansu Province Key Lab. of Industrial Advanced Process Control Lanzhou University of Technology Lanzhou 730050 China

The problem of robust H∞ guaranteed cost fault-tolerant control for a class of networked control system(NCS) with time-varying delay and packet dropout is investigated. A new model is employed to represent the linear controlled plant in the NCS, a sufficient condition for a robust H∞ guaranteed cost integrity design with failures of actuator or sensor is given in terms of a delay-dependent approach. And the design method of the optimal robust H∞ guaranteed cost fault-tolerant controllers is given with LMIs constraints. Moreover, a less conservative method is obtained due to the lower bound of the time-delay introduced in the model and appropriate free-weighting matrices introduced during the proof. A numerical example shows the effectiveness of the proposed method.

关键词： Networked control systems

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Self-Induced Backaction Optical Pulling Force

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Physical Review Letters 2018年第12期120卷 123901-123901页

作者： Tongtong Zhu Yongyin Cao Lin Wang Zhongquan Nie Tun Cao Fangkui Sun Zehui Jiang Manuel Nieto-Vesperinas Yongmin Liu Cheng-Wei Qiu Weiqiang Ding Department of Physics Harbin Institute of Technology Harbin 150001 China Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore 117583 Singapore Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan 030024 China Department of Biomedical Engineering Dalian University of Technology Dalian 116024 China Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones Científicas Campus de Cantoblanco Madrid 28049 Spain Departments of Mechanical and Industrial Engineering and Electrical and Computer Engineering Northeastern University Boston Massachusetts 02115 USA

We achieve long-range and continuous optical pulling in a periodic photonic crystal background, which supports a unique Bloch mode with the self-collimation effect. Most interestingly, the pulling force reported here is mainly contributed by the intensity gradient force originating from the self-induced backaction of the object to the self-collimation mode. This force is sharply distinguished from the widely held conception of optical tractor beams based on the scattering force. Also, this pulling force is insensitive to the angle of incidence and can pull multiple objects simultaneously.

关键词： Electromagnetism Mechanical effects of light on material media Photonic crystals Optical microcavities Optical tweezers

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Adaptive position tracking control for electro-hydraulic servo system with input saturation

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ICIC Express Letters 2012年第10期6卷 2699-2704页

作者： Shi, Shengli Fang, Yiming Li, Jianxiong Jiao, Zongxia Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China College of Science Yanshan University No. 438 Hebei Ave. Qinhuangdao 066004 China College of Automation Beijing University of Aeronautics and Astronautics No. 37 Xueyuan Road Haidian Dist. Beijing 100191 China

An adaptive controller is proposed for the position tracking of an electrohydraulic servo system with uncertainties and input saturation. Firstly, fuzzy logic is employed to approximate the unknown nonlinear uncertainties. And a nonlinear tracking controller is developed by combining the adaptive backstepping with H∞ control method. In addition, in order to tackle the input constraint, an auxiliary design system based on Lyapunov method is presented. The proposed controller not only can effectively avoid the problem of input saturation, but also can guarantee that the output tracking error satisfies the H-infinity performance. Finally, the simulation results testify the effectiveness of the proposed method. © 2012 ISSN.

关键词： Tracking (position)

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An Architecture Modeling Framework for Distributed Automation Systems Using SysML and Semantic Web Technologies

An Architecture Modeling Framework for Distributed Automatio...

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IEEE International Conference on Mechatronics, Robotics and Automation (ICMRA)

作者： Dan Wang Xiaofeng Li Bin Gu Yue Cao Yusheng Liu Academy of Aerospace Propulsion Technology Innovation Center for Liquid Rocket Engine Digital Research and Development CNSA Xian China Beijing Institute of Control Engineering Beijing China College of Computer Science and Technology Zhejiang University of Technology Hangzhou China State Key Lab. Of CAD&CG Zhejiang University Hangzhou China

ISBN: (数字)9798350307535

ISBN: (纸本)9798350307542

The rising interdisciplinarity and complexity of the Distributed Automation Systems (DASs) require the systems to be modeled in an unambiguous and high-level abstract way for cross-discipline/stage communication and interoperability in the Model-Driven Development (MDD) lifecycle. The concept of the System Architecture Model in systems engineering has been adopted for this challenge. To support the creation and analysis of this model, a modeling framework with a modeling methodology, modeling language, knowledge base, and related toolkit is established based on SysML and Semantic Web Technologies. A modeling methodology which is the core of the framework for modeling the architecture of DASs is formally defined with domain-specificity, comprehensiveness, discipline-neutrality, and platform-independency. Based on it, the SysML-DAS modeling language is extended from SysML, and the System Architecture Ontology is built with the help of the Knowledge Extraction Tool. This ontology works as the knowledge base not only to provide a unified and unambiguous view of the system but also to support the automated accomplishment of tasks in the MDD process. As a typical task, the semantic correctness and integrity of the system architecture model can be assessed by the Knowledge Analysis Tool in this framework.

关键词： Semantic Web Analytical models Automation Mechatronics Knowledge based systems Semantics Systems architecture Ontologies Service-oriented architecture Model-driven development

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Ultrasonic Power Closed-loop control on Wire Bonder

Ultrasonic Power Closed-loop Control on Wire Bonder

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IEEE ELectronics Packaging Technology Conference

作者： He Yunbo Hu Yongshan Chen Xin Gao Jian Yang Zhijun Zhang Kai Chen Yun Zhang Yu Tang Hui Ao Yinhui Guangdong Provincial Key Lab. of Computer Integrated Manufacturing Systems Key Laboratory of Mechanical Equipment Manufacturing and Control Technology of Ministry of Education School of Electromechanical Engineering Guangdong University of Technology

ISBN: (纸本)9781509043705

Ultrasonic is one important factor of ultrasonic wire bonding process, which is widely used in semiconductor packaging industry. control effect of ultrasonic power determines the quality and speed of wire bonding. Based on analysis of ultrasonic frequency characteristics and current response, this paper proposes a closed-loop control method of automatic frequency tracking and output current control, to improve the effectiveness of ultrasonic power, shorten the response time, and enhance the stability of ultrasonic generation. Automatic frequency tracking is based on phase lock method. Phase difference of voltage and current signals works as the feedback of the close-loop control of frequency to realize automatic frequency tracking and ensure that the ultrasonic transducer always works at resonance point. And output current control is working at constant current mode so that the vibration amplitude of ultrasonic can be better controlled by adjusting the ultrasonic current. The experimental results show that with the frequency automatic tracking method, the ultrasonic transducer system can achieve wider frequency bands, with faster phase locking and higher tracking precision. With close loop control, real-time tracking can be realized and less rise time and less overshoot of ultrasonic current can be achieved.

关键词： Ultrasonic Power Closed-loop

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A coal hopper blockage detection based on multi-signal feature fusion

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Diangong Jishu Xuebao/Transactions of China Electrotechnical Society 2015年 30卷 561-564页

作者： Pan, Pan Wu, Hai Li, Haibin Huanghua Port Affairs of China Shenhua Energy Co. Ltd. Cangzhou061000 China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao066004 China

Aiming at the requirements of high real-time and high accuracy for a coal hopper blockage detection in port, the paper proposed a program based on multi-signal feature fusion analysis to detect the coal hopper blockage. First we respectively extracted short-time energy and short-time zero crossing ratio, maximum spectrum of feature vectors of unit box of the vibration sensors and acoustic sensors, then use the Euclidean of neighboring eigenvectors combined with Kalman filter to judge the transient abnormal. Finally, the coal hopper blockage was synthetically judged by anomaly features. The results of the experiments based on lab.iew virtual instrument platform showed that the scheme can quickly achieve funnel signals with high accuracy. ©, 2015, The editorial office of Transaction of China Electrotechnical Society. All right reserved.

关键词： Coal

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Mobile Millimeter Wave Channel Tracking: A Bayesian Beamforming Framework Against DOA Uncertainty

Mobile Millimeter Wave Channel Tracking: A Bayesian Beamform...

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IEEE Global Communications Conference

作者： Yan Yang Shuping Dang Miaowen Wen Shahid Mumtaz Mohsen Guizani State Key Lab. of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China Computer Electrical and Mathematical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Kingdom of Saudi Arabia School of Electronic and Information Engineering South China University of Technology Guangzhou China Instituto de Telecomunicações Campus Universitário de Santiago Aveiro Portugal Department of Computer Science University of Idaho Moscow ID USA

ISBN: (数字)9781728109626

ISBN: (纸本)9781728109633

A Bayesian approach for joint beamforming and tracking is presented, which is robust to uncertain direction-of-arrival (DOA) estimation in millimeter wave (mmWave) multiple input multiple output (MIMO) systems. The uncertain or completely unknown DOA is modeled as a discrete random variable with a priori distribution defined over a set of candidate DOAs, which describes the level of uncertainty. The estimation problem of DOA is formulated as a weighted sum of previously observed DOA values, where the weights are chosen according to a posteriori probability density function (pdf) of the DOA. In particular, we present a motion trajectory-based a priori probability approximation method, which implies a high probability to perform a directional estimate within a specific spatial region. We demonstrate that the proposed approach is robust to DOA uncertainty, and the beam tracking problem can be addressed by incorporating the Bayesian approach with an expectation maximization (EM) algorithm. Simulation results validate the theoretical analysis and demonstrate the effectiveness of the proposed solution.

关键词： Direction-of-arrival estimation Radio frequency Bayes methods Array signal processing Uncertainty Estimation OFDM

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Deep Learning based Defect Detection Algorithm for Solar Panels

Deep Learning based Defect Detection Algorithm for Solar Pan...

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WRC Symposium on Advanced Robotics and Automation (WRC SARA)

作者： Jiaqi Li Hongxu Li Yifan Wu Hailiang Zhou Luigi Manfredi Peng Li Hong Zhang Department of Key Lab of Industrial Computer Control Engineering Hebei Province Yanshan University Qinhuangdao China Department of Computing Science University of Alberta Edmonton AB Canada Hebei Baoding Jiasheng Photovoltaic Technology Co. Ltd. Department of Institute for Medical Science and Technology (IMSaT) University of Dundee United Kingdom Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen China

Defect detection of solar panels plays an essential role in guaranteeing product quality within automated production lines. However, traditional manual inspection of solar panel defects suffers from low efficiency. This paper proposes an enhanced YOLOv5 algorithm (EL-YOLOv5) fused with the CBAM hybrid attention module to ensure product quality. The algorithm focuses on detecting five common types of defects that frequently appear on photovoltaic production lines, namely hidden cracks, scratches, broken grids, black spots, and short circuits. This study utilizes publicly availab.e solar panel datasets, as well as datasets collected from actual photovoltaic production lines. These datasets are annotated accordingly and used to train the proposed algorithm. The experimental results demonstrate that the proposed algorithm achieves good performance on both the public and actual solar panel defect datasets. Particularly in actual datasets, where defect features are often less apparent and defects are smaller in size, the proposed algorithm can still detect even minor black spots.

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Blockchain-Based Homomorphic Transaction Framework for Enhanced Consumer Security and Business Scalab.lity

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IEEE Transactions on Consumer Electronics 2024年

作者： Guo, Tao Shang, Fengjun Dai, Xiangguang Liu, Qilie Chongqing University of Posts and Telecommunications School of Computer Science and Technology Chongqing400065 China Key Laboratory of Big Data Intelligent Computing Chongqing400065 China Chongqing Three Gorges University Key Lab. of Intelligent Info. Proc. and Contr. of Chongqing Munic. Institutions of Higher Education Chongqing Engineering Research Center of Internet of Things and Intelligent Control Technology School of Three Gorges Artificial Intelligence Chongqing400044 China Chongqing University of Posts and Telecommunications School of Communications and Information Engineering Chongqing400065 China

Energy trading in distributed microgrids represents an effective means of enhancing the utilization of renewable energy. However, the aggregation of large-scale consumption data may encounter business scalab.lity issues and potential privacy exposure concerns, necessitating the development of novel secure and scalab.e frameworks for integrating consumption demands between prosumer and microgrid entities. we research focuses on providing a user-friendly transaction model for consumers and microgrid operators. Firstly, a privacy aggregation scheme for user resource requests is designed to ensure the security and decentralization of user data. In addition, the model employs a bidirectional heterogeneous resource allocation mechanism to support the optimal allocation of multiple resources, such as renewable energy, power assets, energy storage devices, and carbon credits, among different microgrids. Finally, a microgrid transaction prototype has been constructed on the Truffle development framework. In this context, smart contracts has been designed to ensure that the transactions are carried out automatically. Experimental results indicate that the scheme provides enhanced security for multi-resource trading in a cluster context relative to existing methodologies. The number of transactions increases linearly with the resource overhead, resulting in more efficient utilization of energy trading. Furthermore, the framework's scalab.lity has been demonstrated through both temporal and spatial considerations. © 1975-2011 IEEE.

关键词： Decentralized finance

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