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2018 International Conference on Advanced Materials, Intelligent Manufacturing and automation, AMIMA 2018

作者： Han, Zhonghua Tian, Xutian Ma, Xiaofu Lin, Shuo Faculty of Information and Control Engineering Shenyang Jianzhu University Liaoning110168 China Digital Factory Department Shenyang Institute of Automation CAS Shenyang110016 China Information and Control Engineering Faculty Shenyang Jianzhu University Liaoning110168 China Department of Electrical and Computer Engineering Virginia Tech BlacksburgVA24060 United States

In order to solve the scheduling problems of Re-entrant Hybrid Flowshop (RHFS), this paper investigates the mathematical programming model of RHFS, and proposes the wolf pack based algorithm (WPA) as a global optimization method. Multi-Sticking Crape Masking procedure scheduling problems in painting workshop of a bus manufacturing enterprise are of typical features of RHFS. We regard it as an application objective of the proposed algorithm, applying WPA and multiple evolutionary algorithms to solve the problems. The results show that the algorithm can solve re-entrant scheduling problems of hybrid flowshop more effectively compared with other conventional methods. © Published under licence by IOP Publishing Ltd.

关键词： Global optimization

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Design embedded control system based controller of the quasi time optimization approach for a magnetic levitation system

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IOP Conference Series: Materials Science and engineering 2021年第1期1029卷

作者： C X Nguyen T D Pham A D Lukynov P C Tran Q D Truong Department of Automation and Computing Techniques Le Quy Don Technical University Hanoi Vietnam Department of Technology Equipment and Aerospace Le Quy Don Technical University Hanoi Vietnam Department of Automation of production processes Don State Technical University Rostov-on-Don Russia Department anti-aircraft missiles Faculty of Control Engineering Le Quy Don Technical University Hanoi Vietnam

The magnetic levitation system is a typical system with many successful applications in practice. Due to the inherent instability and strong open-loop nonlinearity of the MLS, a controller is used to control the stability of the magnetic levitation system. With the rapid development of embedded systems, the intelligent digital control has begun to replace conventional analog control technology creating a new approach to the control MLS. This paper proposes a hardware module for the MLS based on a digital signal processor combined with a fast acting controller to ensure system stability even with incomplete mathematical models. The simulation and experimental results are compared with the linearized feedback control law. Finally, experiments are carried out to test the practical feasibility of the proposed control laws in the MLS embedded control system. The system, with the recommended controller, well responds to the tolerances allowing for stable system working. Both simulation and test results are included in this paper to show that the fast acting suboptimal controller has the advantage of being more durable and less complicated to perform in MLS control applications.

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A Robust PID Autotuning Method Applied to the Benchmark PID18

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IFAC-PapersOnLine 2018年第4期51卷 521-526页

作者： Zhao, Shiquan Cajo, Ricardo Ionescu, Clara M. De Keyser, Robin Liu, Sheng Plaza, Douglas Ghent University Faculty of Engineering Architecture Research group on Dynamical Systems Control Technologiepark 914 ZwijnaardeB9052 Belgium Harbin Engineering University College of Automation China Escuela Superior Politecnica del Litoral ESPOL Grupo de Investigación en Automatización y Control Industrial Campus Gustavo Galindo Km 30.5 Vía Perimetral Guayaquil09-01-5863 Ecuador

In this paper a proportional-integral-derivative (PID) autotuning control strategy is presented and applied to the benchmark system presented at the 3rdIFAC Conference on Advances in Proportional-Integral-Derivative control (PID18). The automatic tuning of controller gains is based on a single sine test, with user-defined robustness margins guaranteed. Its performance is compared against a model based designed controller with computer-aided design tool based on frequency response (FRtool) and against the benchmark reference controller. The closed loop control simulations, applied on the benchmark, indicate that the method properly performed. © 2018

关键词： Proportional control systems Benchmarking Computer aided design controllers Frequency response Refrigeration Three term control systems Two term control systems Autotuner Modulus margins Multi output Multiinput Refrigeration system

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Analytical model of tilted driver–pickup coils for eddy current nondestructive evaluation

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Chinese Physics B 2018年第3期27卷 125-131页

作者： Bing-Hua Cao Chao Li Meng-Bao Fan Bo Ye Gui-Yun Tian School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment China University of Mining and TechnologyXuzhou 221116China School of Mechatronic Engineering China University of Mining and TechnologyXuzhou 221116China Faculty of Information Engineering and Automation Kunming University of Sciance and TechnologyKunming 650500China School of Electrical and Electronic Engineering Newcastle UniversityNewcastle upon Tyne NE17RUUK

A driver-pickup probe possesses better sensitivity and flexibility due to individual optimization of a *** is fre-quently observed in an eddy current(EC)array *** this work,a tilted non-coaxial driver-pickup probe above a multilayered conducting plate is analytically modeled with spatial transformation for eddy current nondestructive ***,the core of the formulation is to obtain the projection of magnetic vector potential(MVP)from the driver coil onto the vector along the tilted pickup coil,which is divided into two key *** first step is to make a projection of MVP along the pickup coil onto a horizontal plane,and the second one is to build the relationship between the pr,ojected MVP and the MVP along the driver ***,an analytical model for the case of a layered plate is established with the reflection and transmission theory of electromagnetic *** calculated values from the resulting model indicate good agreement with those from the finite element model(FEM)and experiments,which validates the developed analytical model.

关键词： nondestructive evaluation eddy currents tilted coils analytical model

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3D Deep Learning for 3D Printing of Tooth Model

3D Deep Learning for 3D Printing of Tooth Model

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IEEE International Conference on Service Operations and Logistics, and Informatics, SOLI

作者： Yiwen Liu Xiuqin Shang Zhen Shen Bin Hu Zhihai Wang Gang Xiong Faculty of Information The State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing University of Technology Beijing China The State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Beijing Engineering Research Center of Intelligent Systems and Technology Chinese Academy of Sciences Beijing China Faculty of Information Beijing University of Technology Beijing China

Recently, with the development of both 3D sensors and 3D virtual network that bring the needs of interaction with the real world, many 3D applications burst out. However, it is difficult to understanding these three-dimensional scenes with a fixed program. Then, a data-driven method is required to process these 3D data, which brings a strong demand of 3D Deep Learning in 3D data. Towards this goal, with an end-to-end deep learning, the experiment is based on PointNet++, a well proposed method for feature extraction. The experiment optimizes the network structure and parameters to improve the classification results. Finally, the network is applied to tooth model for classification and identification so that the dental model can be found from different perspectives.

关键词： Three-dimensional displays Deep learning Transforms Cameras Object segmentation Image segmentation Sensors

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Experimental and Numerical Testing of Possibilities and Limits for Applications of Phase Changed Materials in Buildings

Experimental and Numerical Testing of Possibilities and Limi...

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23rd International Conference on Circuits, Systems, Communications and Computers, CSCC 2019

作者： Charvátová, Hana Zálešák, Martin Koláček, Martin Sehnálek, Stanislav Tomas Bata University in Zlín Faculty of Applied Informatics Regional Research Centre CEBIA-Tech nám. T. G. Masaryka 5555 Zlín760 01 Czech Republic Tomas Bata University in Zlín Faculty of Applied Informatics Department of Automation and Control Engineering nám. T. G. Masaryka 5555 Zlín760 01 Czech Republic

The paper is aimed atto a study of a possibility to use PCM (Phase Change Materials) to increase the thermal storage properties of buildings. For this purpose, both the experimental testing and computer modelling were performed. The PCM DuPont Energain panel was used for the study of its thermal technical parameters under laboratory conditions. Laboratory testing of the effect of PCM surface treatment showed a double increase in the heat transfer coefficient, but also a decrease of 17 % in the time constant under given conditions. The computer modelling was used for the study of the influence of walls sheathing on the temperature comfort inside the tested room of the wooden house by its passive cooling in summer. Results of the numerical simulations proved influence of the PCM covering. But in the presented model, the PCM covering caused only a slight improvement in the thermal comfort inside the room. © 2019 The Authors, published by EDP Sciences.

关键词： Phase change materials

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Tiny noise, big mistakes: Adversarial perturbations induce errors in Brain-Computer Interface spellers

arXiv

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arXiv 2020年

作者： Zhang, Xiao Wu, Dongrui Ding, Lieyun Luo, Hanbin Lin, Chin-Teng Jung, Tzyy-Ping Chavarriaga, Ricardo Ministry of Education Key Laboratory of Image Processing and Intelligent Control School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan430074 China Centre of Artificial Intelligence Faculty of Engineering and Information Technology University of Technology Sydney Sydney2007 Australia La Jolla CA92093 United States Center for Advanced Neurological Engineering Institute of Engineering in Medicine UCSD La Jolla CA92093 United States ZHAW DataLab Zürich University of Applied Sciences Winterthur8401 Switzerland

An electroencephalogram (EEG) based brain-computer interface (BCI) speller allows a user to input text to a computer by thought. It is particularly useful to severely disabled individuals, e.g., amyotrophic lateral sclerosis patients, who have no other effective means of communication with another person or a computer. Most studies so far focused on making EEG-based BCI spellers faster and more reliable;however, few have considered their security. This study, for the first time, shows that P300 and steady-state visual evoked potential BCI spellers are very vulnerable, i.e., they can be severely attacked by adversarial perturbations, which are too tiny to be noticed when added to EEG signals, but can mislead the spellers to spell anything the attacker wants. The consequence could range from merely user frustration to severe misdiagnosis in clinical applications. We hope our research can attract more attention to the security of EEG-based BCI spellers, and more broadly, EEG-based BCIs, which has received little attention before. Copyright © 2020, The Authors. All rights reserved.

关键词： Electroencephalography

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Adaptive PI-control of Superheat in a Refrigeration System

Adaptive PI-Control of Superheat in a Refrigeration System

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control Technology and Applications (CCTA),

作者： Glenn Andreasen Kirsten M. Nielsen Palle Andersen Tom S. Pedersen Roozbeh Izadi-Zamanabadi Faculty of Electrical Engineering Automation and Control University of Aalborg Aalborg Denmark Danfoss

This paper describes adaptive control of the superheat in a refrigeration system. Traditionally, the superheat is PI controlled using constant gain and integration time, which often will have a conservative tuning. On-line update of the controller parameters in self-tuning scheme by identification in open loop or by using external signals in closed loop is cumbersome. In this work a method using PI controllers with shifting parameters in a bumpless set-up has been used for finding better parameters. Each controller is used in a certain time interval and ISE (Integrated Squared Error) is calculated as a measure for the quality. This is used in a gradient method to increase the performance. The improved PI controller gives the possibility to optimise the superheat reference via an additional control loop. The controllers are designed and tested in a laboratory set-up. The performance of the shifting adaptive controller turns out to have a better performance than a fixed parameter PI controller.

关键词： Valves Temperature measurement PI control Refrigerants Temperature sensors

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Independent Joint control System Design Method for Robot Motion Reconstruction 4th

Independent Joint Control System Design Method for Robot Mot...

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4th International Conference on Advanced engineering Theory and Applications, AETA 2017

作者： Tran, Manh Son Le, Nhat Binh Nguyen, Van Trong Dang, Dac Chi Choi, Eun Ho Kim, Young Bok Department of Mechanical System Engineering Pukyong National University Busan48547 Korea Republic of Department of Automation Control Faculty of Electrical and Air Conditioning Engineering Cao Thang Technical College Ho Chi Minh City Viet Nam

ISBN: (纸本)9783319698137

It is a challenging and hard problem to control the multi-joint robot manipulators due to the nonlinearities which are extremely and strongly coupled in the set of dynamic equations governing the motion dynamics of the robot system. This paper presents a robot control technique for definitely reconstructing motions. The controlled robot is used in small industries such as welding and painting work. The proposed method is a simple one and decentralized linear joint control strategy. Exactly describing, it is an user-oriented method and no need complex computation. In this study, at first, the mathematical model of each joint of the 5 DOF robot arm is derived individually. Secondly, to improve the control performance in transient response, nonlinear controllers such as feedback linearization as well as sliding mode control are exploited to compensate the nonlinearities and uncertainties. Finally, experiments are carried out to verify the effectiveness and feasibility of the presented approach, and the results are compared to those of the tuned PID controller. The results point out that the proposed control scheme is simple, realistic and can be easily employed on robot manipulators in the real world. © Springer International Publishing AG 2018.

关键词： Decentralized control

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IMC based PID control Applied to the Benchmark PID18

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IFAC-PapersOnLine 2018年第4期51卷 728-732页

作者： Cajo, Ricardo Zhao, Shiquan Ionescu, Clara M. De Keyser, Robin Plaza, Douglas Liu, Sheng Ghent University Faculty of Engineering and Architecture Research group on Dynamical Systems Control Technologiepark 914 ZwijnaardeB9052 Belgium Escuela Superior Politecnica del Litoral ESPOL Grupo de Investigación en Automatización y Control Industrial Campus Gustavo Galindo Km 30.5 Vía Perimetral Guayaquil09-01-5863 Ecuador Harbin Engineering University College of Automation China

In this paper an Internal Model control (IMC) based proportional-integral-derivative (PID) control is presented and evaluated on the benchmark system presented at the 3rdIFAC Conference on Advances in Proportional-Integral-Derivative control (PID 18). The controller is designed based on the model of the benchmark system. Its performance is compared with a computer-aided design tool based on frequency response (FRtool) and against the benchmark reference controller. The results show that the proposed method has a better performance due to the fact that IMC based PID parameters depend totally on the model. © 2018

关键词： Proportional control systems Benchmarking Computer aided design controllers Frequency response Model predictive control Multivariable systems Refrigeration Three term control systems Two term control systems Benchmark system Computer aided design tools FRtool Internal model control PID parameters Proportional integral derivative control Refrigeration system

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