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International Conference on Open Source Systems and Technologies (ICOSST)

作者： Muhammad Zia Ur Rahman Muhammad Azeem Akbar Muhammad Usman Muhammad Hurrirah Tahir Shahzaib Muhammad Tanveer Riaz Muhammad Abbas Khan Dept. of Mechanical Mechatronics and Manufacturing Engineering University of Engineering & Technology (UET) Lahore Faisalabad Campus Faisalabad Pakistan Department of Information Technology Lappeenranta University of Technology Lappeenranta Finland Dept. of Mechatronics and Control Engineering University of Engineering & Technology (UET) Lahore Faisalabad Campus Faisalabad Pakistan Department of Electrical Engineering Balochistan university of information technology engineering and management sciences Quetta Pakistan

Sign language is used by the deaf to interact with hearing individuals in the community. Despite the fact that sign language is often used, the general population is unaware of it, and only hearing-impaired people are familiar with its usage. In this article, we have created a system for real-time sign language recognition in order to communicate with folks who are deaf or hard of hearing by using Pakistan Sign Language (PSL) as its sign language. Ten types or indications of PSL are differentiated in this study. Flex sensors in the glove can detect the position of certain fingers. The MPU-6050, a micro-electro-mechanical device is used to capture the unique characteristics of the hand's movement in a 3D space. In this setup, a Raspberry Pi 3B serves as the microcontroller. MPU-6050 and Flex sensors performance are integrated with additional elements including mean, energy, variance, and correlation for classification. In our investigation, we have collected information from over 3,000 movement feature samples from different people. To increase the precision of the proposed methodology, we have incorporated several machine learning classification algorithms.

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DECENTRALIZED DIFFUSION-BASED LEARNING UNDER NON-PARAMETRIC LIMITED PRIOR KNOWLEDGE

arXiv

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arXiv 2023年

作者： Wachel, Pawel Kowalczyk, Krzysztof Rojas, Cristian R. Department of Control Systems and Mechatronics Wroclaw University of Science and Technology Wroclaw Poland School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden

We study the problem of diffusion-based network learning of a nonlinear phenomenon, m, from local agents’ measurements collected in a noisy environment. For a decentralized network and information spreading merely between directly neighboring nodes, we propose a non-parametric learning algorithm, that avoids raw data exchange and requires only mild a priori knowledge about m. Non-asymptotic estimation error bounds are derived for the proposed method. Its potential applications are illustrated through simulation experiments. Copyright © 2023, The Authors. All rights reserved.

关键词： Electronic data interchange

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Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure

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Journal of Magnesium and Alloys 2021年第5期9卷 1818-1827页

作者： M.G.Jiang C.Xu H.Yan T.Nakata Z.W.Chen C.S.Lao R.S.Chen S.Kamado E.H.Han College of Mechatronics and Control Engineering Shenzhen University3688 Nanhai AveShenzhen 518060China The Group of Magnesium Alloys and Their Applications Institute of Metal ResearchChinese Academy of Sciences62 Wencui RoadShenyang 110016China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka 940-2188Japan

The static recrystallization and associated texture evolution were investigated in an extruded Mg-Zn-Gd alloy with bimodal microstructure based on a quasi-in-situ electron back-scatter diffraction(EBSD)*** typical rare earth(RE)texture formed during annealing,evolving from the bimodal microstructure with[1010]basal fiber texture that consisted of fine recrystallized(RXed)grains and coarse unrecrystallized(un RXed)grains elongated along the extrusion *** both RXed and un RXed regions,the RXed nucleation produced randomized orientations without preferred selection and the RXed grains with RE texture orientation had more intensive growth ability than those with basal fiber orientation,thereby leading to the preferred selection of RE texture orientation during grain *** relationships between stored strain energy,solute drag,grain growth and texture evolution are discussed in *** study provided direct evidence of the RE texture evolution in an extruded Mg-RE alloy,which assists in understanding the formation mechanisms for RE texture during extrusion and better developing wrought Mg alloys with improved formability.

关键词： Magnesium alloy Rare earth texture Extrusion Annealing Recrystallization

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Aircraft wing vibration parameters measurement system using MEMS IMUs and closed-loop optimal correction

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Aerospace Systems 2022年第3期5卷 473-480页

作者： Maamo, M.S. Afonin, A.A. Sulakov, A.S. Department of Control Systems Informatics and Power Engineering Moscow Aviation Institute (National Research University) Volokolamskoe shosse 4 Moscow 125993 Russian Federation Faculty of Robotics and Mechatronics Moscow University for Industry and Finance «Synergy» Street Meshchanskaya 9/14 Moscow 129090 Russian Federation

Nowadays, there is still a need for the development of a high-precision measurement system for aircraft structural elements vibrations, this is due to the fact that many aviation problems are associated with analyzing vibration characteristics of aircraft mechanical structures during its main modes of operation, including flight, particularly the airplane wing health monitoring. This paper presents preliminary results of research carried out toward building a promising system designed to measure vibration parameters of airplane wing. Comparing it with the existing analogues systems, the proposed system features the use of approaches that are traditional for solving orientation and navigation problems for vibration measurements. The article discusses the principles of building such system based on micromechanical inertial measurements units, displacement sensors, on-board aircraft navigation system and sensor data fusion technology. The paper provides a brief overview of the existing solutions in this field of research, and substantiates the relevance and feasibility of the proposed technical solution. The paper presents the basic hardware components of the proposed system, presents the fundamentals of its operation based on the data collected from many sources, including displacement sensors, inertial units and the optimal Kalman estimation and correction algorithm. Besides, the paper presents the mathematical errors models of the system main components. The main algorithms of the system are shown, including algorithms for inertial measurements, estimation and correction in a closed-loop scheme for including optimal Kalman filter, and indirect calculations of vibration parameters. Finally, the initial simulation results of system operation are shown, demonstrating its operability and expected accuracy characteristics, which confirms the system effectiveness and the prospects of the chosen direction of research. © 2022, Shanghai Jiao Tong University.

关键词： Airplane wing Closed-loop optimal correction MEMS IMU Navigation and orientation Optimal Kalman filter Sensor data fusion Vibration measurement

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Dual-Purpose dc-dc/ac PWM Modular Power Converter as Grid-Forming Unit in a Droop-controlled ac Nanogrid

Dual-Purpose dc-dc/ac PWM Modular Power Converter as Grid-Fo...

引用

Annual Conference of Industrial Electronics Society

作者： Carlos Roncero-Clemente Javier-Gutiérrez Escalona Oleksandr Matiushkin V. Fernão Pires María Isabel Milanés-Montero Enrique Romero-Cadaval Electrical Electronic and Control Engineering Department University of Extremadura Spain Badajoz Spain Department of Electrical Power Engineering and Mechatronics Tallin University of Technology Tallinn Estonia DEE Sustain. RD ESTSetúbal Instituto Politécnico Setúbal INESC-ID Lisboa

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

This paper presents the design and implementation of a grid-forming control for a dual-purpose dc-dc/ac PWM modular power converter tailored for three-phase three-wire ac conversion in nanogrid applications. The study emphasizes the integration of grid-forming and droop control mechanisms to ensure system stability and controlled power sharing. Extensive simulations and analyses demonstrate the effectiveness of the proposed control strategy, yielding swift and precise responses to dynamic power demand changes. The research offers valuable insights into the operation and functionality of this power converter topology within ac nanogrids, contributing to enhanced grid flexibility and reliability in renewable energy systems.

关键词： Renewable energy sources Analytical models Power demand Pulse width modulation Power system stability control systems Stability analysis Topology Reliability Grid forming

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Intelligent On-Line System for Monitoring Technical Condition of High-Voltage Cable Couplings

Intelligent On-Line System for Monitoring Technical Conditio...

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International Russian Smart Industry Conference (SmartIndustryCon)

作者： Vadim R. Gasiyarov Stanislav V. Voronin Andrey A. Radionov Ivan V. Lyubimov Sergey A. Evdokimov Vadim R. Khramshin Department of Automation and Control Moscow Polytechnic University Moscow Russia Department of Mechatronics and Automation South Ural State University Chelyabinsk Russia Power Engineering and Automated Systems Institute Nosov Magnitogorsk State Technical University Magnitogorsk Russia

The article provides the characteristics of the end cable couplings of the closed switchgear 110 kV at the electric steelmaking workshop of the metallurgical plant. The functions of the continuous technical condition monitoring system are substantiated, including continuous temperature monitoring and on-line registration of partial discharges in the insulation. The first function provides monitoring of the operational load, and the second has the maximum sensitivity for diagnosing defect propagation. A functional diagram of the developed intelligent on-line system for monitoring technical condition with digital signal transmission is provided. The choice of sensors and processor unit is justified. The authors consider the temperature control system of high-voltage equipment “WDM-T”, including a wireless sensor and an information receiver. The results of monitoring the thermal regime are provided, the advantages of partial discharge analysis are pointed out. The temperature trends of the end couplings included in the cable line phases are considered. The system is implemented on the closed switchgear 110 kV end couplings, its long-term operation has confirmed the effectiveness of technical condition monitoring. The developed system may be a component of an on-line cyberphysical system for monitoring the condition of high-voltage equipment in the electric steelmaking workshop.

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Recycling of waste titanium slag to functional glass ceramics;the effect of Bi2O3 on physical, structural, optical and radiation shielding properties

引用

Ceramics International 2025年

作者： Otoo, Samuel Leumas Dankwah, James Ransford Baffoe, Estella Efiba Sawadogo, Balkissa Xu, Junguo Kinyanjui, Samuel Mungai College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China College of Mechatronics and Control Engineering Shenzhen University Shenzhen518060 China Department of Minerals Engineering University of Mines and Technology Tarkwa Ghana School of Resources and Environmental Engineering Wuhan University of Technology Wuhan430070 China Shenzhen College of Advanced Technology University of Chinese Academy of Sciences Shenzhen518055 China

The design and development of functional materials from industrial waste materials for environmental sustainability has received critical attention in recent decades. This study successfully developed environmentally clean glass ceramics using titanium slag through the conventional melt quenching technique. The influence of the incorporation of Bi2O3 at 10, 20 and 30 % on density, open porosity, water absorption, phase composition, structure, microstructure, optical properties and radiation shielding properties of the glass ceramic were investigated. The results showed that all sintered glass ceramics contained crystalline phases such as diopside, clinopyroxene or titanian aluminian and rankinite. Incorporating Bi2O3 resulted in the crystallization of calcium bismuth titanate (CBT) which increased the density of the glass ceramics and improved the microstructure leading to reduced open porosity and water absorption. The T6S1B3 sample exhibited 18.13 % lower band gap, 9.80 % higher refractive index and 20.59 % higher dielectric constant. At 0.1 MeV, T6S1B3 recorded a mass attenuation coefficient of 1.6798 cm2g-1 which is 733.5 % higher than T9S1. Similarly, higher HVL and MFP values both at 30.7 % was obtained at 1MeV. Therefore, this presents a pathway to utilize waste titanium slag to develop glass ceramics with characteristics that are effective in remediating hazardous concerns with ionizing radiations and possess good non-linear optical properties. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Glass ceramics

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Fabrication of helical flutes on the micro-drill surface by micro-EDM using composite disc foil electrodes

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International Journal of Advanced Manufacturing Technology 2025年第5期138卷 2357-2367页

作者： Xu, Bin Liu, Weitong Lian, Manqun Lei, Jianguo Wu, Xiaoyu Fu, Lianyu Zhao, Chunyang Zhang, Canbin Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control Engineering Shenzhen University Guangdong Shenzhen518060 China Shenzhen Jinzhou Precision Technology Corp Shenzhen518116 China State Key Laboratory of Ultra-Precision Machining Technology Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong

Micro-drills are widely used in the micro-hole machining of printed circuit boards. Helical flutes, the core feature of micro-drills, play a crucial role in chip discharge. Precision grinding technology is commonly used for machining the helical flutes in micro-drills. Grinding is a contact machining technology that generates a grinding force during the process. When the diameter of the micro-drill is minimal (Φ ≤ 100 µm), the grinding force is extremely prone to cause deformation or even fracture of the micro-drill, leading to a decreased yield. To overcome the above problem, the paper proposed an approach to fabricate a helical flute structure on the surface of a micro-drill by micro electrical discharge machining (micro-EDM) using a beryllium-copper-tin composite disc foil electrode (CDFE). Micro-EDM, a type of non-contact machining, can effectively avoid the disadvantage of grinding the helical flute of the micro-drill. Through an orthogonal experiment, the effects of the rotation velocity of the CDFE, machining voltage, and pulse duration ratio on the machining quality of the helical flutes were analysed in detail. Finally, with 4000 r/min CDFE rotation velocity, 24 V machining voltage, 1 µs pulse duration and 3 µs pulse interval, a helical flute structure with a surface roughness Ra of 0.381 µm was successfully machined on the surface of a 70 µm diameter micro-drill. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Surface roughness

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Current Challenges and Advancements of Aerial Thermography for Outdoor Structural Health Monitoring: A Review

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IEEE Sensors Journal 2025年第12期25卷 21000-21016页

作者： Ma, Yue Zeng, Zhi Luo, Zipei Tao, Ning Deng, Lei Tian, Yibin Shenzhen University College of Mechatronics and Control Engineering Shenzhen518060 China Chongqing Normal University College of Computer and Information Science Chongqing401331 China Capital Normal University Department of Physics Key Lab of Terahertz Optoelectronics of the Ministry of Education Beijing100048 China

In the rapid development of outdoor structural health monitoring, infrared thermal imaging and unmanned aerial vehicles (UAVs) have emerged as transformative tools, significantly enhancing maintenance efficiency in expansive outdoor structures. This review highlights the advancements in UAV-assisted thermography, focusing on its impact on the monitoring capabilities of outdoor engineering structures. It introduces UAV-assisted thermographic methods tailored for outdoor environments, explorees current challenges influencing their efficacy, and thoroughly examines their integration with machine learning techniques, demonstrating their applications in identifying structural flaws and deformations. Furthermore, the review emphasizes the transformative potential of 3D thermographic modelling to localize and characterize defects effectively. It contributes actionable insights to optimize UAV-assisted thermographic practices. The findings underscore the importance of integrating UAVs and thermography to overcome existing limitations in outdoor structural health monitoring inspections, setting the stage for a paradigm shift in large-scale outdoor structural condition assessments. © 2001-2012 IEEE.

关键词： Thermography (imaging)

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A Biomechatronic Approach to Evaluating the Security of Wearable Devices in the Internet of Medical Things

arXiv

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arXiv 2024年

作者： Vaseghi, Yas Behara, Behnaz Delrobaei, Mehdi Department of Systems and Control Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran Iran Department of Biomedical Engineering Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran Iran Department of Mechatronics Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran Iran

The Internet of Medical Things (IoMT) has the potential to revolutionize healthcare by reducing human error and improving patient health. For instance, wearable smart infusion pumps can accurately administer medication and integrate with electronic health records. These pumps can alert healthcare professionals or remote servers when an operation fails, preventing distressing incidents. However, as the number of connected medical devices increases, so does the risk of cyber threats. Wearable medication devices based on IoT attached to patients' bodies are particularly vulnerable to significant cyber threats. Since they are connected to the internet, these devices can be exposed to potential harm, which can disrupt or degrade device performance and harm patients. Therefore, it is crucial to establish secure data authentication for internet-connected medical devices to ensure patient safety and well-being. It is also important to note that the wearability option of such devices might downgrade the computational resources, making them more susceptible to security risks. We propose implementing a security approach for a wearable infusion pump to mitigate cyber threats. We evaluated the proposed architecture with 20, 50, and 100 users for 10 minutes and repeated the evaluation 10 times with two infusion settings, each repeated five times. The desired volumes and rates for the two settings were 2 ml and 4 ml/hr and 5 ml and 5 ml/hr, respectively. The maximum error in infusion rate was measured to be 2.5%. We discuss the practical challenges of implementing such a security-enabled device and suggest initial solutions. © 2024, CC BY-NC-ND.

关键词： Wearable technology

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