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2023 China Automation Congress, CAC 2023

作者： Tang, Hongwei Zhou, Gongbo Tang, Chaoquan Wang, Haoran School of Mechatronics Engineering China University of Mining and Technology Xuzhou China

ISBN: (纸本)9798350303759

The coal mine hoisting system is responsible for the lifting and lowering tasks of underground workers, coal and equipment. As an important part of the hoisting system, the safety performance of rigid guide rail directly affects the safety of coal mine production. In order to solve the problem of low efficiency of manual inspection at present, this paper proposes a new rigid guide rail fault detection robot and detection method. First of all, based on our previous research, a new detection robot prototype is developed. Secondly, a method of detecting rail fault using robot attitude is proposed. Finally, the performance of the robot and the effectiveness of the detection method are verified by field experiments. At present, the robot proposed in this paper is the first robot tested onsite for fault detection of rigid guide rail of coal mine hoisting system. The detection robot system proposed in this paper can improve the intelligent and unmanned level of coal mines, and can also be extended to the detection of railway tracks and elevator guide rails in buildings. © 2023 IEEE.

关键词： Coal mines

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Analysis of Sound Levels and Speech Intelligibility in the Presence of X4 Unmanned Aerial Vehicle in External Environmental Conditions 26

Analysis of Sound Levels and Speech Intelligibility in the P...

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26th IEEE Signal Processing: Algorithms, Architectures, Arrangements, and Applications, SPA 2023

作者： Miesikowska, Marzena Kielce University of Technology Faculty of Mechatronics and Mechanical Engineering Kielce Poland

ISBN: (纸本)9798350304985

The aim of this work was to analyze acoustic parameters and evaluate the possibility of human-drone communication in external environmental conditions. The ability to establish human-drone communication may prove to be a useful option for emergency rescue medical systems, where the detection of voice and speech can identify the presence of a person, vital functions and needs. In this experiment, the drone hovered over the recording equipment at a height of 8m above the ground. To determine the possibility of human-drone communication, the acoustic parameters and classification results obtained from the discriminant function analysis were analyzed. Discriminant analysis was based on parameterized speech commands using Mel-frequency cepstral coefficients. This paper presents the results of the research: the possibilities for human-drone communication. © 2023 Division of Signal Processing and Electronic Systems, Poznan University of technology (DSPES PUT).

关键词： Antennas

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Corrosion Behaviour of Ni–Al Coated T23 Weldments at Elevated Temperatures

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Journal of Bio- and Tribo-Corrosion 2024年第2期10卷 1-17页

作者： Srivastava, Madhulika Murmu, Sagar Kumar Chattopadhyaya, Somnath Dutta, Vibekananda Bhaumik, Shubrajit Department of Mechanical Engineering Amrita School of Engineering Amrita Vishwa Vidyapeetham Tamil Nadu Chennai601103 India Jharkhand Dhanbad826004 India Department of Mechatronics Warsaw University of Technology Warsaw Poland

The study investigates the high-temperature corrosion behaviour of Ni–Al coatings produced by the wire arc spraying technique on ASME SA T23 low alloy ferritic tube weldments prepared by shielded metal arc welding. The oxidation tests were conducted on coated and uncoated base metal and welded specimens at 900 °C. The samples were exposed to three salt mediums: a) 80% Flyash + 10% Na2SO4 + 10% V2O5, b) 80% flyash + 10% Na2SO4 + 10% V2O5 and c) 80% Flyash + 10% KCl + 10% NaCl at 900 °C for 100 h. The performance of the coatings was assessed by recording the weight variations and corrosion rate. The surface morphology of the corroded surface was analysed by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) techniques. The results indicated significant improvement in the high-temperature corrosion resistance of Ni–5Al coated T23 weldment compared to the uncoated counterpart. In the presence of 80% Flyash + 10% Na2SO4 + 10% V2O5 medium, the coated samples exhibited a weight gain of 163%, whilst in the presence of 80%Flyash + 10% Na2SO4 + 10% NaCl, 22.84% weight gain was observed. Similarly, the Ni–5Al coated base metal also exhibited a weight gain of 102% in 80% flyash + 10% Na2SO4 + 10% V2O5 medium and 42% in 80% flyash + 10% Na2SO4 + 10% NaCl. Conversely, 80% Flyash + 10% KCl + 10% NaCl medium showed a weight loss of 105.34% in Ni–5Al coated base metal and 114% in the weld bead. SEM micrographs revealed a severe corrosion rate in uncoated samples due to the non-protective layer's scaling, spalling and deposition. EDS analysis showed the presence of SiO2 and Al2O3 as protective layers in an aggressive molten salt environment in Ni–5Al-coated specimens. This work has applications in fields where corrosion resistance is crucial for maintaining the reliability and safety of machinery exposed to high temperatures, such as coal-fired boilers. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Scanning electron microscopy

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Reply to comment on “Ferroelectric composite-based piezoelectric energy harvester for self-powered detection of obstructive sleep” by A. Tkach and O. Okhay

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Journal of Materiomics 2024年第5期10卷 1160-1164页

作者： Swati Panda Hyoju Shin Sugato Hajra Yumi Oh Wonjeong Oh Jeonghyeon Lee P.M.Rajaitha Basanta Kumar Panigrahi Jyoti Shukla Alok Kumar Sahu Perumal Alagarsamy Hoe Joon Kim Department of Robotics and Mechatronics Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988South Korea Department of Electrical Engineering Siksha‘O’Anusandhan UniversityBhubaneswar 751030India Department of Electrical Engineering Poornima College of EngineeringJaipur 303903India Department of Physics Indian Institute of Technology-GuwahatiAssam 781039India Robotics and Mechatronics Research Center Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988South Korea

In this contribution,we reply to comments made by Tkach et *** our publication *** 2023;9:*** main interest of our work is to synthesize a lead-free material,SrTi_(2)O_(5)(STO),and then utilize it in the formation of composites and finally design the piezoelectric nanogenerator(PENG)for self-powered sensor *** authors have observed the presence of piezoelectric voltage and current output from the *** authors humbly indicate that the PENG devices were poled using a DC poling setup as conditions mentioned in *** 2023;9:609(Panda et al.,2023)[1].The doping of STO into the PDMS increased from 2% to 20%(in mass).In this process,the piezoelectric output of the PENG device was observed to be highest for 15%(in mass)STO-PDMS ***,we agree with the comment raised by Tkach et al.,and further we have addressed the issues in a step-by-step response as follows.

关键词： Ferroelectric Lead-free Piezoelectric Polycrystalline

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Effects of Voltage Transients on the dc Droop Control in Residential Nanogrids 17

Effects of Voltage Transients on the dc Droop Control in Res...

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17th IEEE International Conference on Compatibility, Power Electronics and Power engineering, CPE-POWERENG 2023

作者： Roasto, Indrek Blinov, Andrei Vinnikov, Dmitri Jalakas, Tanel Tallinn University of Technology Department of Electrical Power Engineering and Mechatronics Estonia

ISBN: (纸本)9798350300048

The droop control is a well-known method to control distributed sources and loads in a microgrid. In residential buildings the dc droop control is expected to dominate due to a recent trend towards dc distribution. The dc droop control relies fully on the dc-link voltage while providing power sharing and load shedding. However, the dc droop voltage range is relatively limited, and can be easily disturbed and affected by many factors e.g., sudden load transients. Since there are many papers theoretically analyzing dc droop control stability issues, the goal of this paper was to study those problems more from practical point of view. The effect of load transients on the dc bus voltage was experimentally studied with three different types of loads. Six experiments were conducted and analyzed. © 2023 IEEE.

关键词： Power quality

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Development of eco-friendly brake pads using industrial and agro-waste materials

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Journal of engineering and Applied Science 2024年第1期71卷 1-42页

作者： Dirisu, Joseph O. Okokpujie, Imhade P. Apiafi, Pepple B. Oyedepo, Sunday O. Tartibu, Lagouge K. Omotosho, Olugbenga A. Ogunkolati, Emmanuel O. Oyeyemi, Enoch O. Uwaishe, John O. Department of Mechanical Engineering Covenant University Ota Nigeria Department of Mechanical and Industrial Engineering Technology University of Johannesburg Johannesburg2028 South Africa Department of Mechanical and Mechatronics Engineering Afe Babalola University Ado Ekiti Nigeria

There has been an increase in research over the past decades into the use of environmentally friendly materials in brake pads, such as natural fibres. This is due to the possibility that natural fibbers could serve as an alternative to the noxious asbestos materials in tribological applications like brake pads. As a result, utilizing the compacting mould technique, an asbestos-free friction material was developed using agricultural waste (coconut shell and oil bean stalk) as a filler element, alongside aluminium dross, metal chip industrial wastes and carbon black. The filler material considered had particles as small as 300 μm, with epoxy resin serving as the binding agent. Using these waste materials can help reduce environmental pollution and the risk to animal and plant life (Preeti et al., Pharma Innov J 7:94–102, 2018;Sajib, A Study on the effects of environmental pollution on human life in the riverbank area of Barishal City Corporation (Kirtankhola River), 2021). This research aimed to replace asbestos in brake pads due to its carcinogenic nature, reducing the health risks associated with manufacturing and using these brake pads. The brake pad materials were cast and produced using square wooden moulds. Four samples were created, comprising the same mixing ratio but varying in reinforcement fibre and particle size, with epoxy resin used as the matrix. Various tests were conducted on these samples, including a water absorption test, specific gravity test, compressive strength test, hardness test, thermal conductivity, SEM and EDX. The developed brake pads underwent microscopic characterization and structural examination using a scanning electron microscope (SEM) fitted with energy-dispersive X-ray spectroscopy (EDX) for elemental characterization. Thermal conductivity was obtained using automated Lee’s Disc apparatus. Comprehensive strength analysis was conducted using a universal testing machine (UTM). The specific gravity tests yielded values for the develo

关键词： Compressive strength

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Human-Centered Design and Development of an Elderly Care Robot 6

Human-Centered Design and Development of an Elderly Care Rob...

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6th International Conference on Robotics and Automation in Industry, ICRAI 2024

作者： Sajid, Ali Sultan, Muhammad Noor Ishfaq, Muhammad Muaviz Raza, Ali University of Engineering and Technology Lahore Human Centered Robotics Lab of NCRA Department of Mechatronics and Control Engineering Lahore Pakistan

ISBN: (纸本)9798350355703

Constituting to the demographic age shift in many regions of the world, technological advancement in the care sector, to deliver quality services to the elders, is now in more demand than ever. One such advancement is the evolution of socially assistive and care robots that promise sustainable, reliable, and safe human-robot interaction to meet geriatric needs. This paper presents the design and development of Silver Companion: a geriatric care robot for the elderly. The target audience chosen for the research phase is the socially isolated elderly community of East Asia and Central Europe which make up about 45% of their total elderly population. Considering the human-centered design paradigm, the technical and psychological aspects of the robot have been devised. The form and functions of the robot have been based on the product design principles. The whole development journey has been subjected to the identified elderly needs and the robot has been tested under multiple use-case scenarios, ideated for possibly fulfilling those needs. The robot has been equipped with assistive and interactive features like voice interaction, complementing micro-gestures and robot expressions, seamless navigation, and robot perception enhanced by a tilt-pan mechanism, all contributing towards making the robot capable of uplifting the well-being and quality of life of seniors. © 2024 IEEE.

关键词： Care Robots Geriatric Care Human Centered Design Human-Robot Interaction Micro Gestures Navigation Robot Expressions Robot Field of View Socially Assistive Robots Voice Interaction

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Multi-Parameter Influence Analysis of Interaction Between Internal Solitary Wave and Fixed Submerged Body

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China Ocean engineering 2023年第6期37卷 934-947页

作者： LIU Shuang HE Guang-hua ZHANG Zhi-gang HU Chang-hong ZHANG Cheng WANG Zheng-ke XIE Hong-fei School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China Shandong Institute of Shipbuilding Technology Weihai 264209China School of Ocean Engineering Harbin Institute of TechnologyWeihaiWeihai 264209China Research Institute for Applied Mechanics Kyushu UniversityFukuoka 816-0811Japan

To obtain the interaction characteristics between Internal solitary waves(ISWs)and submerged bodies,a three-dimensional numerical model for simulating ISWs was established in the present study based on the RANS *** velocity entrance method was adopted to generate the ***,the reliability of this numerical model was validated by comparing it with theoretical and literature ***,the influence of environmental and navigation parameters on interactions between ISWs and a fixed SUBOFF-submerged body was *** to research,the hydrodynamic performance of the submerged body has been significantly impacted by the ISWs when the body is nearing the central region of the ***,the pitching moment(y')will predominate when the body encounters the ISWs at a certain angle between 0°and 180°,and the lateral force is larger than the horizontal ***,the magnitude of the force acting on the body is mostly affected by the wave *** variation of the vertical force is the main way that ISWs affect the hydrodynamic performance of the *** investigations and findings discussed above can serve as a guide to forecast how ISWs will interact with submerged bodies.

关键词： CFD internal solitary waves submerged body multi-parameters influence hydrodynamics

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Design and Implementation of Novel Buffer-less NoC Router 4

Design and Implementation of Novel Buffer-less NoC Router

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4th International Conference on Soft Computing for Security Applications, ICSCSA 2024

作者： Parepalli, Ramanamma Sharma, Sanjeev Kumar Naik, Mohan New Horizon College of Engineering Electronics and Communication Engineering Bengaluru India Mangalore Institute of Technology and Engineering Department of Mechatronics Mangalore India

ISBN: (纸本)9798331515720

In large tiled chip multiprocessors (TCMP), the connectivity between different processors is through Network on Chip (NoC). In NoC, NoC router plays a very important role. The two different types of routers are Buffered and Bufferless NoC routers. A bufferless NoC router is a viable solution due to its modest router architecture, hardware effectiveness and energy. Because several subnetworks are linked by an additional link amid two related routers, DeC allows a challenging flit in one subnetwork to be transmitted to other subnetwork rather than being deflected. NoC is defined by performance metrics such as latency, deflection rate, throughput, and power, all of which are dependent on the underlying network architecture. In this paper, a novel method such as Deflection Containment Path Distance Analyzer (DeC-PDA) Bufferless NoC router is proposed to solve the problem of extreme deflection during flit transmission. The results show that the area consumption is less compared to buffered routers. © 2024 IEEE.

关键词： Network-on-chip

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Ferrochrome and Graphite Transfer in Mild Steel Welds with E6013SS Electrode 21st

Ferrochrome and Graphite Transfer in Mild Steel Welds with E...

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21st ISME International conference on Advances in Mechanical engineering, ISME 2023

作者： Pandey, Sunil Kumar, Manoj Mittal, Madhav Department of Mechanical-Mechatronics Engineering LNM Institute of Information Technology Rajasthan Jaipur302031 India

ISBN: (纸本)9789819736539

Surface modification through welding is used to enhance the service life of a variety of engineering components. These components, due to the prolonged service, undergo wear and hence need a replacement or an attempt can be made to salvage them. Rebuilding of these components to the required size by welding can considerably reduce the cost. Weld surfacing is a cost effective and proven technique for depositing protective coatings. An attempt has been made to add ferrochrome LC and graphite to mild steel weld metal using E6013SS covered electrodes. The required surface was coated with a paste of ferrochrome LC and graphite in potassium silicate. The powders were mixed in a calculated proportions, and uniform thickness was maintained by using a fabricated height gauge. Substrate with a coated paste was preheated at 90 °C for 30 min and further heated to 110 °C for another 30 min. Weld runs were deposited over the preheated coating using E6013SS covered electrodes. Welds were made with nine different paste formulations. Effect of welding parameters on element transfer behavior was analyzed with Taguchi design of experiment using L9 orthogonal array. Four parameters with three levels were selected for these experiments. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Graphite

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