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检索条件"机构=Faculty of Automation and Computer Science"

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Energy-Saving Practice of Variable Frequency Drive Technology in Data Center HVAC System 5

Energy-Saving Practice of Variable Frequency Drive Technolog...

引用

5th International Conference on Power and Energy Technology, ICPET 2023

作者： Ai, Chuanxian Yang, Jinpeng Chen, Rui Kunming University of Science and Technology Faculty of Information Engineering and Automation Kunming China The National Computer Network Emergency Response Technical Team Coordination Center of China Yunnan Branch Kunming China Guizhou Power Grid Co. Ltd. China Southern Power Grid Co. Ltd Power Dispatch Control Center Guiyang China

ISBN: (纸本)9798350339673

The variable-frequency drive technology (VFD) can modify the motor speed or torque by varying the frequency and voltage of the AC motor input power according to the load demand as a way to save energy. To analyse the energy saving effect of variable-frequency drive technology applied to data centre heating, ventilation, and air conditioning (HVAC) systems, this paper applies VFD technology to data centre fluorine pump-compressor composite air conditioning systems, implements monitoring and analysis of the operational energy efficiency of this system before and after retrofit, and combines the actual application of this technology. The findings indicate that the VFD technology can substantially reduce the number of compressor starts and stops, reduce the compressor start-up inrush current, and improve the power system's stability. Furthermore, utilising this technology, the HVAC system can effectively synchronise with the load and fluctuations in outdoor temperature and humidity, resulting in accurate temperature regulation and optimal utilisation of outdoor cooling resources. This approach can lead to significant energy conservation of up to 42.95% when compared to extreme hot and cold weather conditions. The findings of the study indicate that the utilisation of VFD technology exhibits commendable adaptability and yields favourable outcomes in regions with varying temperature ranges. The minimum PUE value recorded was 1.228. © 2023 IEEE.

关键词： data center energy saving HVAC system variable-frequency drive technology

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Laboratory for Electrical Engineering Using Mixed Reality 2

Laboratory for Electrical Engineering Using Mixed Reality

引用

2nd International Conference on Control Systems, Mathematical Modeling, automation and Energy Efficiency, SUMMA 2020

作者： Yazykova, Liubov Muzyleva, Inna Gorlach, Alina Gorlach, Yakov Lipetsk State Technical University Automation and Computer Science Faculty Lipetsk Russia

ISBN: (纸本)9781728188409

The article discusses an electrical laboratory using mixed reality technologies. The authors have developed a working version of the educational application for a computer or smartphone using mixed reality technology. The capabilities of the application developed by the authors are shown on the example of the discipline "Theoretical Foundations of Electrical Engineering". A fragment of the application structure in the form of mind maps is presented. The main stages of the application are demonstrated. Using the example of electrical engineering, it is shown that the learning process can quickly meet the requirements of the era of industrial revolution 4.0. This is possible with the help of modern technologies, one of which is mixed reality technology. The application developed by the authors allows you to increase the practical orientation of laboratory work. It gives the student the opportunity to explore the actual appearance of electrical components. Device models are demonstrated by pointing the student's smartphone camera at the corresponding markers in a real or virtual laboratory. The application was developed in the software environment of the augmented reality object constructor EV Toolbox, the basic educational version of Standard Edu. 3D models are created in Autodesk Inventor. © 2020 IEEE.

关键词： Simulink

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The System of computer-Aided Design of Organizational Documentation in the Context of Digitalization of the University 2

The System of Computer-Aided Design of Organizational Docume...

引用

2nd International Conference on Control Systems, Mathematical Modeling, automation and Energy Efficiency, SUMMA 2020

作者： Muzyleva, I. Yazykova, L. Martynova, A. Gorlach, A. Gorlach, Y. Lipetsk State Technical University Automation and Computer Science Faculty Lipetsk Russia

ISBN: (纸本)9781728188409

The present can be safely called the era of the revolutionary transformation of the educational system. This is very difficult process. It is accompanied by the creation of a huge number of interrelated documents. Each document has a large number of repetitions of the same information. The result is a structured document, formed taking into account all standards. And its design takes the minimum time from a teacher. Since the organization of this process can be organized as follows. The teacher fills in the input forms and submits them to the member of the project team. He does all the routine work. Thus, an automated system for creating a work program will free the teacher from routine. He will be able to devote more time to improving his skills and creative work with students. © 2020 IEEE.

关键词： Curricula

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Selection of Morphological Indicators to Identify Anomalous Areas in Photographic Images of Homogeneous Surfaces 2

Selection of Morphological Indicators to Identify Anomalous ...

引用

2nd International Conference on Control Systems, Mathematical Modeling, automation and Energy Efficiency, SUMMA 2020

作者： Nazarkin, Oleg Vedishchev, Vitalii Zhuravlyova, Marina Alexeev, Vladimir Domashnev, Pavel Faculty of Automation and Computer Science Lipetsk State Technical University Lipetsk Russia

ISBN: (纸本)9781728188409

Methods for selection of morphological indicators necessary for classification of anomalous areas on photographic images of homogeneous surfaces are considered. The use of binarization and posterization procedures has been studied, morphological indicators based on them have been proposed. An original scheme for analyzing influence of median filtering on morphological indicators has been developed. Possibility of using the DCT-coefficient to improve reliability of results obtained is considered, local indicators are proposed. Results of application of described procedures for analysis of images of homogeneous surfaces with anomalous areas are presented. © 2020 IEEE.

关键词： Photography

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A Vision-Based Autonomous AI Tic-Tac-Toe Manipulation System

A Vision-Based Autonomous AI Tic-Tac-Toe Manipulation System

引用

International Electrical Engineering Congress (iEECON)

作者： Panjawee Rakprayoon Akechai Ounsiri Ratchanon Chongyoa Dept. AI Engineering and Data Science Faculty of Engineering Bangkok University Pathum Thani Thailand DNA ROBOTICS and Automation System Company Limited Pathum Thani Thailand Dept. Computer and Robotics Engineering Faculty of Engineering Bangkok University Pathum Thani Thailand

ISBN: (数字)9798350383591

ISBN: (纸本)9798350383607

For an AI tic-tac-toe manipulator application, a real-time vision-based approach is proposed. The technique employs the RealSense camera to capture color and depth images. Combining object detection and image processing techniques to identify X's and O's positions on the game board. However, we recognize that errors can occur during object movement when using only 2D images. To solve this problem, a calibration method between RealSense and the manipulator based on the point-to-plane ICP algorithm is presented. This method provides the 3D object position in the robot coordinate, resulting in increasing the accuracy from 86.25% to 97.25%. Our experiment shows that this technique is highly effective and can accurately identify position objects.

关键词： Three-dimensional displays Robot kinematics Robot vision systems Games Object detection Manipulators Real-time systems

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Energy-based Control of Three-Link Planar Robot with Last Active Link

Energy-based Control of Three-Link Planar Robot with Last Ac...

引用

Chinese automation Congress (CAC)

作者： Yongjia Wang Xin Xin Yannian Liu School of Automation Southeast University Nanjing China Faculty of Computer Science and Systems Engineering Okayama Prefectural University Okayama Japan

This paper studies the energy-based control for a 3-link planar robot with last active link, for which the angle between the last link and the vertical is actuated. The swing-up and stabilizing task around the robot’s upright equilibrium point (UEP) is investigated. An energy-based controller is derived to control both its overall energy and actuated variable. By presenting a property of the robot that holds under arbitrary physical parameters, this paper proves that almost all initial states converge to an invariant set where the last link is upright and the robot’s overall energy equals its value at the UEP, providing certain requirements on control gains are satisfied. This paper provides simulation verification for the obtained theoretical results, in which a local stabilizing controller is utilized to accomplish stabilization at the UEP.

关键词： Analytical models automation Switches Control systems Trajectory Task analysis Robots

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Asymmetric Modulated Predictive Current Control for Dual Three-Phase PMSM With Improved Performance

Asymmetric Modulated Predictive Current Control for Dual Thr...

引用

International Conference on Power Electronics and Motion Control (IPEMC)

作者： Ze Li Xingyu Zheng Jinhui Xia Hangan Liu Xiaonan Gao Jose Rodriguez Liling Wang Zhaoyan Zhang Zhiheng Liu College of Electronic and Information Engineering Hebei University China School of Automation Southeast University China School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Sweden Faculty of Engineering Universidad San Sebastian Chile

ISBN: (数字)9798350351330

ISBN: (纸本)9798350351347

Dual three-phase PMSM (DTP-PMSM) has gained significant attention benefiting from their exceptional reliability and high torque density. However, DTP-PMSM exhibits poor steady-state performance and large calculation amount with the conventional finite-control-set predictive current control. To address these concerns, an asymmetric modulated predictive current control (AM-PCC) for DTP-PMSM is presented. Therein, the three-phase decomposition and deadbeat control scheme are combined to eliminate the weighting factor and optimize the execution efficiency. An asymmetric modulation strategy is presented and integrated into PCC to reduce the current harmonics and switching frequency. Extensive simulation tests are conducted to demonstrate the effectiveness of the proposed AM-PCC scheme.

关键词： Current control Torque Switching frequency Dynamics Modulation Harmonic analysis Power electronics

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Swing-Down Control of a Rings Gymnastic Robot

Swing-Down Control of a Rings Gymnastic Robot

引用

Chinese automation Congress (CAC)

作者： Zhijie Jin Xin Xin Zhiyu Peng Yannian Liu School of Automation Southeast University Nanjing China Faculty of Computer Science and Systems Engineering Okayama Prefectural University Okayama Japan

In this paper, we study the swing-down control of a rings gymnastic robot, which is a 3-link planar robot moving in a vertical plane with only the last joint being actuated. The control objective is to swing the rings gymnastic robot from the DUU (Down–Up–Up) equilibrium point to the DDD (Down–Down– Down) equilibrium point and stabilize it around the latter. We present an SD (sinusoidal-derivative) controller, which is linear feedback of sinusoidal function of the angle of the actuated joint and linear feedback of its angular velocity. We analyze globally the motion of the rings gymnastic robot under the proposed controller, and provide a sufficient condition for achieving the control goal. We study how to find control gains to achieve an exerllent control performance, and verify the effectiveness of the proposed control via simulation.

关键词： Sufficient conditions automation Stability analysis Angular velocity Robots

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Cascade-Frequency Electric Drive: Structure, Control, Energy Saving, Mathematical Modeling 2

Cascade-Frequency Electric Drive: Structure, Control, Energy...

引用

2nd International Conference on Control Systems, Mathematical Modeling, automation and Energy Efficiency, SUMMA 2020

作者： Shishlin, Denis Lipetsk State Technical University Automation and Computer Science Faculty Lipetsk Russia

ISBN: (纸本)9781728188409

The creation of energy-saving AC electric drives is an urgent task for the modern production. Most electric drives of general industrial mechanisms are equipped with asynchronous squirrel-cage motors, which are powered by frequency converters. At the same time, a number of production mechanisms are equipped with asynchronous motors with a phase rotor (cranes, ball mills, some types of conveyors and turbo-mechanisms). The beneficial use of slip energy and its return to the mains supply or to the stator circuit of the engine can increase the efficiency of the electrical installation. This is typical for circuits based on asynchronous valve cascades. As part of the modernization of electric drives, it seems appropriate to develop hybrid circuits based on frequency control circuits and cascade electric drive circuits, their control system. Mathematical modeling of electric drives of this type will allow analyzing the static and dynamic characteristics of the given modes of their operation. © 2020 IEEE.

关键词： Control systems

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Energy-based Swing-up Control with Parameter Optimization for a Rings Gymnastic Robot

Energy-based Swing-up Control with Parameter Optimization fo...

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Chinese automation Congress (CAC)

作者： Jiangyong Hu Xin Xin Yuhang Yan Zhiyu Peng Yannian Liu School of Automation Southeast University Nanjing China Faculty of Computer Science and Systems Engineering Okayama Prefectural University Okayama Japan

In this paper, we study a ring gymnastic robot, which is a planar robot with three links moving in the vertical plane with only the last joint activated. First, we use the energy-based strategy to study the swing-up control task of the rings gymnastic robot, and obtain the sufficient and necessary condition for non-existence of singularities in the energy-based controller. Second, we derive the invariant set approached by the closed-loop system. Third, we propose an optimization algorithm to obtain the parameters of the energy-based controller to swing up the rings gymnastic robot into a close neighbourhood of a desired equilibrium point. Fourth, we check on the feasibility of the devised controller and parameter optimization algorithm through simulation.

关键词： automation Numerical models Closed loop systems Task analysis Robots Optimization

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