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Innovation in Technology (ASIANCON), Asian Conference on

作者： Anagha N. Chikalthankar Amruta S. Deshpande Dayaram.N. Sonawane Ketaki A. Ghodinde Smita S. Patil Dept. of Instrumentation and Control COEP Technological University Pune India Dept. of Electronic and Telecommunication Engineering COEP Technological University Pune India

ISBN: (数字)9798350354218

ISBN: (纸本)9798350354225

Low-flow control applications are critical for shower systems and various industrial applications. These applications are indispensable due to the precise flow and temperature conditions required by many processes, which make them essential for achieving desired results. Present flow control applications vary in complexity, and some require skilled installation and maintenance, which can be expensive and sensitive. Traditional control methods can be limiting, resulting in heavy and bulky structures. This paper presents a novel mathematical modeling and advanced control strategy to control low flow applications. The presented simulation results, which include PID and fuzzy logic controllers, demonstrate that smooth control can be achieved by varying various parameters in combination. These findings offer valuable insights into the development of control strategies for low flow applications.

关键词： Fuzzy logic Temperature sensors Technological innovation Limiting Flow production systems Simulation Mathematical models Temperature control Maintenance Transient analysis

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Decision Method of Operation and Maintenance of CBTC System Based on Knowledge Graph 14

Decision Method of Operation and Maintenance of CBTC System ...

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14th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Chai, Linguo Li, Xiaoyu Wei, ShangGuan Cai, Baigen Cheng, Gaoyun Nie, Min School of Electronic and Information Engineering The State Key Laboratory Rail Traffic Control Beijing Jiaotong University Beijing China School of Electronic and Information Engineering Beijing Jiaotong University Beijing China Traffic Control Technology Co. Ltd. Beijing China Material Supplying Dept. State Grid Beijing Procurement Company Beijing China

ISBN: (纸本)9798350301359

At present, the failure disposal process for the CBTC system relies heavily on the personal experience of practitioners, and the level of intelligence is at a low level. At the same time, the valuable information in the failure log text is not effectively exploited. Aiming at these problems, this paper proposes a decision-making method for CBTC system operation and maintenance(0&M) based on knowledge graph. First, the knowledge graph construction process is built by combining top-down and bottom-up methods, and the schema layer of the whole failure O&M process is designed by combining expert knowledge. Then, the BERT pre-training model is applied to extract failure entities from the labeled dataset, and the experiment is used to prove the good performance of this model. Next, the extracted entities and their relationships are in the form of nodes and edges for failure knowledge graph is populated and visualized using Neo4j. Finally, the CBTC system O&M knowledge graph is applied to give the failure cause tracing and maintenance suggestion generation method, and the usability of the proposed method is verified with examples, which can effectively assist practitioners to make the O&M decision. © 2023 IEEE.

关键词： BERT component: CBTC system failure entity extraction knowledge graph O&M decision

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A Study on the Heating and Efficiency Characteristics of Lithium-ion Battery Modules for the Vessel

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Transactions of the Korean Institute of Electrical Engineers 2023年第12期72卷 1657-1662页

作者： Park, Keun-Seok Kim, Si-Kyung Kang, Yu-Sick Kim, Ki-Chan Dept. of Electrical and Electronic Engineering Hanbat National University Korea Republic of Dept. of Southwestern Branch Research Institute of Medium & Small Shipbuilding Korea Republic of Dept. of Electrical Electronic and Control Engineering Kongju National University Korea Republic of

The commercialization technology of lithium-ion batteries has changed various industrial trends, including e-mobility and shipbuilding industries. In the shipbuilding industry, the ship's electric propulsion system is a system that applies torque and rotational force of an motor to ship's propulsion power, and the capacity of the power system affects ship's operating time and is classified as a major technology. Lithium-ion batteries have many effects in the industry, but they generate heat during the battery charging and discharging process, and the battery temperature is affected by environmental temperature, so a range of controlled temperatures is required. In this paper, the power system of electric propulsion ships is proposed as a module combination, and the maintain temperature range of modules is derived from parallel experiments on temperature and charge and discharge. According to the experimental results, the charging & discharging efficiency and safety of the power supply module can be expected if natural cooling or forced cooling is performed to maintain the temperature of the installation area below 40℃. © The Korean Institute of Electrical Engineers.

关键词： Lithium-ion batteries

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Detection of Consumer Electrical Load Profile Anomalies

Detection of Consumer Electrical Load Profile Anomalies

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Eurocon

作者： Michael Farrugia Kenneth Scerri Andrew Sammut Dept. of Systems and Control Engineering University of Malta Msida Malta Dept. of Electronic Systems Engineering University of Malta Msida Malta

Faulty meters, billing inaccuracies and fraudulent activity all contribute to the non-technical losses experienced by power utilities. Apart from the intended advantage of billing efficiency, the advent of smart meters for consumption and load profile logging, has made possible the analysis of subscriber data for load balancing and consumer classification, amongst other uses. This study analyses data from smart meters in Malta and develops a method for anomaly detection aiming to identify costumers contributing to non-technical losses. Consumers are grouped into clusters with similar weekly consumption patterns using hierarchical clustering. For each consumer, two novel coefficients are then computed: the Anomaly Coefficient, which measures the divergence in consumption patterns for a consumer from all other member of the same cluster, and the Cluster Change Coefficient, which quantifies the likelihood of a customer to exhibit patterns associated with other clusters. Together these two measures are joined in a single Anomaly Score, thus identifying consumers with highly irregular consumption patterns.

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Monotonic Tracking of Step References for Linear Switched Systems under Arbitrary Switching Signals

Monotonic Tracking of Step References for Linear Switched Sy...

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European control Conference (ECC)

作者： Maria Christine Honecker Robert Schmid Kai Wulff Johann Reger Control Engineering Group Technische Universität Ilmenau Ilmenau Germany Dept. of Electrical and Electronic Engineering University of Melbourne Victoria Australia

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

We consider the analytical controller design for a class of switched linear systems. Under suitable system assumptions, we propose a method using eigenstructure assignment that guarantees the closed-loop switched system is globally asymptotically stable under arbitrary switching signals, and the outputs achieve monotonic step reference tracking from all initial conditions. Additionally, the output signals from both subsystems can be made identical, so the effects of the system switching are not noticeable from the output. A constructive algorithm is provided that yields suitable feedback matrices, and the method is illustrated with a numerical example.

关键词： Linear systems Switched systems State feedback Asymptotic stability Switching systems Switches control systems

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The Measurement Algorithm of the Center of Pressure Based on the Tactile Sensor

The Measurement Algorithm of the Center of Pressure Based on...

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Intelligent Systems, International Workshop on

作者： Jaehyeon Baik Sejun Park Yunho Choi Kyung-Joong Kim Hosu Lee Dept. of Control and Robot Engineering Gyeongsang National University Jinju Korea School of Integrated Technology Gwangju Institute of Science and Technology Gwangju Korea

ISBN: (数字)9798350353303

ISBN: (纸本)9798350353310

Stroke survivors often experience balance disorders, significantly increasing the risk of falls. Accurate COP (Center of Pressure) measurements are essential for evaluating balance and rehabilitation outcomes. To measure COP, force plates are expensive and not user-friendly. Another system for measuring COP is Insole Pressure Sensors (IPS). However, IPS has limitations in accuracy and usability. In this paper, we suggested a cost-effective COP measurement algorithm based on high-resolution Tactile sensors which has electrodes aligned at right angles on each side of a commercial piezoresistive film, and can capture human footprints in great detail. Furthermore, a static experiment was conducted with weight plates to evaluate the COP measurement capability of the system. In future works, we will focus on validating the system's durability, usability, and integration into rehabilitation programs, as well as comparing dynamic COP measurements with force plate data.

关键词： Weight measurement Force measurement Accuracy Force Dynamics Tactile sensors Pressure measurement IP networks Reliability Usability

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Battery Management System Performance Enhancement using Single Sliding Mode Based Charge Equalization controller 6

Battery Management System Performance Enhancement using Sing...

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6th International conference on Advanced Technology and Applied Sciences, ICaTAS 2021

作者： Ashraf, Ali Sobaih, Abdul-Azim Nabil, Essam Dept. of Industrial Electronics and Control Engineering Faculty of Electronic Engineering Menoufia University Minuf Egypt

In this paper, the study aims to evolve a precision model of a Battery charge equalization controller (BCEC) that manage each cell of a lithium-ion (Li-ion) battery, monitoring and balancing by charging and discharging a series-connected Li-ion battery with several cells (n) in electric vehicle (E.V.) applications. An intelligent Sliding mode controller is evolved to activate bidirectional cell switches and regulate a chopper circuit 's direct current (DC-DC flyback converter circuit) with PWM generation. To implement a small-scale BCEC, the model consists of individual models of an E.V., cells of Li-ion battery, a fly-back converter, and a single sliding mode controller (SSMC) for charging and discharging are integrated with n series-connected cells of Li-ion-battery. The BCEC output shows that the cells are operated within a safe range, and the difference in the state of charge (SOC) is maintained to be 0.1%. Comparing the developed BCEC with the existing controllers, with the performance, control algorithm, efficiency, power loss, size, and cost. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： controllers

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Mitigating Non-linear DAC Glitches Using Dither in Closed-loop Nano-positioning Applications

Mitigating Non-linear DAC Glitches Using Dither in Closed-lo...

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American control Conference (ACC)

作者： Ahmad Faza John Leth Arnfinn A. Eielsen Dept. of Energy and Petroleum Engineering University of Stavanger Norway Dept. of Electronic Systems Automation & Control Aalborg University Denmark

Digital-to-analog conversion is essential in digital signal processing applications, including closed-loop control schemes. Noise and distortion in digital-to-analog converters result in reduced performance for high-precision mechatronics such as nano-positioning. Glitches are common in practical switched systems such as digital-to-analog converters; observed as an output disturbance. Due to the wide-bandwidth, impulse-like behavior, control law bandwidth is generally too low to provide adequate attenuation; deteriorating open and closed-loop performance. This article demonstrates how large-amplitude high-frequency periodic dither mitigates the effect of glitches in a nano-positioning system under closed-loop control. Simulations are performed using a model that includes significant non-linearities with a response fitted to an off-the-shelf commercial device, as well as using standard linear time-invariant models for other system components fitted to the responses of common, commercially available devices. The results highlight the significance of reconstruction filter design when applying dithering in this setting.

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Criterion for Sufficiently Large Dither Amplitude to Mitigate Non-linear Glitches

Criterion for Sufficiently Large Dither Amplitude to Mitigat...

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control Technology and Applications (CCTA),

作者： Ahmad Faza’ John Leth Arnfinn A. Eielsen Dept. of Energy and Petroleum Engineering University of Stavanger Norway Dept. of Electronic Systems Automation & Control Aalborg University Denmark

A model describing glitch disturbances is introduced and analysed. The model is used to find the response of glitch disturbances when adding a periodic dither to the input and applying low-pass filtering to the output. This averaged response is used to find a criterion to determine a sufficiently large dither amplitude that will make the averaged glitch disturbances appear as a constant on the output of the low-pass filter. An important resulting property is that the averaged response to glitch disturbances is independent of the model input. By fitting the model to the measured response of a common off-the-shelf digital-to-analogue converter, simulations are used to verify the analytical results.

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Enhanced Dual-Stream Point Cloud Feature Extraction Network with Mask Improvement for Human Activity Recognition

Enhanced Dual-Stream Point Cloud Feature Extraction Network ...

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International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Zhiying Lin Chenliang Zhu Peiwei Deng Zhibin Gao Hezhi Lin Lianfen Huang dept. of information and communication engineering school of informatics Xiamen University Xiamen China dept. of information and control engineering institute of navigation Jimei University Xiamen China dept. of information and communication engineering school of electronic science and engineering Xiamen University Xiamen China

ISBN: (数字)9798350386271

ISBN: (纸本)9798350386288

Millimeter-wave (mmWave) radar technology is widely applied in the field of human health monitoring due to its capability to obtain 3D point cloud sequences for human activity recognition (HAR). The current single-stream models, influenced by the sparsity of point clouds, are unable to capture the multi-scale features of human activities. Therefore, this paper proposes a dual-stream point cloud feature extraction network with mask improvement to address the adverse effects on network pooling operations caused by point cloud completion, and introduces a multi-channel hybrid fusion architecture. A dataset involving 10 different actions using mmWave radar has been established. The experimental results demonstrate that the proposed dual-stream network outperforms existing single-stream networks in recognition accuracy on both proprietary and public datasets. The strategy of temporal feature fusion applied to the dual-stream network results in a 1% improvement in the accuracy of recognizing each action.

关键词： Point cloud compression Accuracy Image recognition Three-dimensional displays Millimeter wave radar Feature extraction Information filters

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