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2021 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2021

作者： Tu, Wen-Fu Wang, Yi-Shun Chen, Tu-Sheng National Kaohsiung University of Science and Technology Marit Mechatronics Engineering Lab Department of Marine Engineering Kaohsiung Taiwan National Kaohsiung University of Science and Technology Ph.D. Program In Maritime Science and Technology College of Maritime Kaohsiung Taiwan

ISBN: (纸本)9781665419512

Marine diesel engine start-up goes through the following speed stages: dead slow, slow, half, and full. The jacket water should be heated initially to prevent the cylinder from cracking due to excessive temperature difference. In this paper, PID temperature controller and SCADA system are used to heat the jacket water. Experimental tests have been evaluated to improve closed loop response with PID temperature controller and SCADA system. The heating mode calls the appropriate PID controller according to the design temperature to compare the actual temperature at different stages. The experimental results show that the PID controller converges the temperature well between 35and 80, the optimal PID parameter are P=3, I=198, D=495 with the auto tune function and the max. power supply current I=8.8A, voltage V=110V. © 2021 IEEE.

关键词： Three term control systems

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Adaptive Fuzzy Sliding Mode Control With Logarithmic Sliding Surface for Active Suspension Systems

Adaptive Fuzzy Sliding Mode Control With Logarithmic Sliding...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Andika Aji Wijaya Fitri Yakub Winda Astuti Mahmud Iwan Solihin S. Syafiie Department of Mechanical Engineering University of Business and Technology (UBT) Jeddah Saudi Arabia Department of Electronic Systems Engineering University of Technology Malaysia (UTM) Kuala Lumpur Malaysia Department of Computer Engineering BINUS ASO School of Engineering Automotive and Robotics Program Bina Nusantara University (BINUS) Jakarta Indonesia Department of Mechanical and Mechatronics Engineering UCSI University Kuala Lumpur Malaysia Department of Chemical and Materials Engineering Faculty of Engineering-Rabigh King Abdulaziz University Jeddah Saudi Arabia

ISBN: (数字)9788993215380

ISBN: (纸本)9798331517939

This paper introduces a hybrid control strategy that integrates the unique features of natural logarithm sliding mode control (lnSMC) and fuzzy logic systems. The lnSMC control approach ensures that the vibration amplitude remains within a bound, as determined by the parameters of the lnSMC switching function. Furthermore, the fuzzy logic system is employed to approximate the nonlinearities and uncertainties inherent in the suspension system components, such as the spring and damper. The stability of the closed-loop system is analyzed using the Lyapunov stability theorem, guaranteeing convergence within a finite time. To validate the effectiveness of the proposed controller, a simulation study was carried out using a quarter-car suspension model, considering the system’s nonlinearities, parameter uncertainties, and various external disturbances. The results indicate that the proposed controller significantly improves ride comfort while maintaining suspension deflection and road holding within critical safety limits.

关键词： Fuzzy logic Vibrations Uncertain systems Uncertainty Roads Switches Stability analysis Vehicle dynamics Springs Sliding mode control

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Comparative Analysis of Computer Vision Techniques for Traffic Signs Recognition in Autonomous Vehicles

Comparative Analysis of Computer Vision Techniques for Traff...

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International Conference on Computer Theory and Applications (ICCTA)

作者： Yaman Sahu Mahmoud Wael Bibek Gupta Tasneem Tarek Abdelkareem Mohamed A. Wahby Shalaby EU4M Mechatronics Program (MECT) School of Engineering and Applied Sciences Nile University 6th October Egypt Mechatronics Program (MECT) School of Engineering and Applied Sciences Nile University 6th October Egypt Information Technology Dept. Faculty of Computers and Artificial Intelligence Cairo University Giza Egypt Smart Engineering Systems Research Center (SESC) Nile University 6th October Egypt

ISBN: (数字)9798350309584

ISBN: (纸本)9798350309591

The popularity of self-driving vehicles has been steadily increasing due to advancements in technology. These vehicles, often referred to as autonomous vehicles, rely on a combination of sensors, cameras, and artificial intelligence to operate. Cameras have multiple applications in autonomous vehicles, including traffic sign detection and processing. This study aims to compare the performance of three computer vision techniques - SIFT (Scale Invariant Feature Transform), ORB (Oriented FAST and Rotated BRIEF), and CNN (Convolutional Neural Network) - on the same data set using precision, recall and F1-Score as metrics. The experimental results of this study indicate that CNN outperforms SIFT and ORB in terms of all mentioned metrics.

关键词： Measurement Computer vision Transforms Cameras Convolutional neural networks Artificial intelligence Autonomous vehicles Intelligent sensors

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Reconfigurable Hardware Accelerator of Morphological Image Processor

Reconfigurable Hardware Accelerator of Morphological Image P...

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Electronic Communications, Internet of Things and Big Data (ICEIB), International Conference on

作者： Ming-Yi Lin Sheng-Hsien Hsieh Ching-Han Chen Department of Computer Science and Engineering Yuan Ze University Taoyuan Taiwan Bachelor's Program in Artificial Intelligence and Mechatronics National Pingtung University of Science and Technology Pingtung Taiwan Department of Computer Science and Information Engineering National Central University Taoyuan Taiwan

Researchers emphasize the importance of hardware accelerators for mathematical morphology. If there are any issues, the hardware architecture may need to be redesigned. Thus, we propose a novel, reconfigurable hardware architecture with pipeline techniques for acceleration. With the order control register, there is no need to modify the architecture even if different results are expected. Furthermore, the hardware architecture caters to specific purposes instead of requiring a purpose-built hardware design.

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Energy Production Techniques - An Overview

Energy Production Techniques - An Overview

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IEEE International Conference on Emerging & Sustainable Technologies for Power & ICT in a Developing Society (NIGERCON)

作者： Sunday Adeniran. Afolalu Temitayo Samson. Ogedengbe Moses. Emetere Elewa R. Remilekun Ogunnigbo Charles Olawale Lodewyk Willem Beneke Mechanical and Mechatronics Engineering Department Afe Babalola University Ado-Ekiti Ado-Ekiti Nigeria Department of Mechanical Science University of Johannesburg Johannesburg South Africa Mechanical Engineering Department Nile University of Nigeria Abuja Physics Program. Bowen University Iwo Osun State Nigeria Department of Mechanical Engineering Faculty of Engineering and Built Environment Tshwane University of Technology Pretoria South Africa

ISBN: (数字)9798331542559

ISBN: (纸本)9798331542566

Green Hydrogen (GH) has emerged as a very promising medium for transporting environmentally friendly energy. The integration of H 2 -based energy capacity frameworks and fuel cells with other sustainable energy sources has been facilitated by the use of H 2 as the primary operational medium, making such integration extremely cost-effective. This report presents an outline of the ebb and flow movements inside the field of GH age techniques using water electrolyzers energized by sustainable power sources. This review focuses on solar and hydrogen energy generation. The role of these energy types as well as the challenges with their generation has also been discussed. Hydrogen can be used to produce electricity in a variety of ways, including fuel cells and gas turbines. If made cheaper than its fossil fuel alternatives, this would be an incentive for power-producing companies to go green.

关键词： Hydraulic turbines Humanities Reviews Electricity Green products Fuel cells Production Green hydrogen Fossil fuels Water resources

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Dynamic Numerical Studies of a Rotorcraft Entering and Exiting Rectangular Tunnel

Dynamic Numerical Studies of a Rotorcraft Entering and Exiti...

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IEEE International Conference on e-Business engineering (ICEBE)

作者： Uzu-Kuei Hsu Hong-Bin Chang Yao-Yu Tsai Chang-Hsien Tai Bachelor Program in Artificial Intelligence and Mechatronics National Pingtung University of Science and Technology Kaohsiung City Taiwan SCERDC General Research Service Center National Pingtung University of Science and Technology Kaohsiung City Taiwan Dept. of Vehicle Engineering National Pingtung University of Science and Technology Kaohsiung City Taiwan ROC

In recent years, the utilization of multi-rotor drones has seen a steady rise. Unmanned aerial vehicles (UAV) have found diverse applications, including aerial photography, transportation, military operations, and agriculture. The advent of these compact flying machines offers humanity a range of convenient and versatile choices across various sectors. Although unmanned aerial vehicles hold significant practical value, their stable flight is contingent on favorable weather conditions. Consequently, it becomes crucial to investigate the influence of environmental airflow on aircraft stability. This is particularly important for small machines like rotary-wing aircraft operating in confined spaces, where understanding the aerodynamic effects of the flow field is crucial to avert potential crashes. This study delves into the variations in the flow field during the entry and exit of a single rotor into a tunnel. Utilizing dynamic simulations, it examines how tunnels impact the rotor’s flow field and analyzes thrust curves to understand dynamic rotor behavior. The study also explores the effect of vortex generation on the rotor and employs a simple square tunnel to assess how tunnel size and flight speed influence the rotor’s flow field during flight. The findings hold potential as reference points to enhance flight stability during tunnel flights.

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A Methodology for Obtaining and Validating Parameters for Surface Repairs Using the Pulsed Gmaw Process

SSRN

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SSRN 2023年

作者： Muñoz Chávez, Jairo José de Souza Lira, Margareth Nascimento Bestard, Guillermo Alvarez da Cruz Payão Filho, João Alfaro, Sadek Crisostomo Absi Post-Graduation Program in Mechatronics Engineering Department of Mechanical Engineering University of Brasilia CEP 70.910-900 Brazil Federal University of Rio de Janeiro Department of Metallurgical and Materials Engineering National Laboratory of Welding Technology Rio de Janeiro RJ Ilha do FundãoCEP 21941-972 Brazil

This study aims to develop a methodology for obtaining and validating surface parameters using the pulsed GMAW process, capable of producing a weld with appropriate geometric properties as a response. For this purpose, profiling was used as a capture tool together with stability analysis algorithms and metallic transfer criteria. The Fast Fourier Transform was used to analyze the intensity of electric current and voltage oscillogram for the delimitation of the most efficient pulse, detachment characteristics, and drop frequency in each analyzed parameter. In parallel, mathematical modelling of the overlapping of welding beads and volume filling simulation was carried out to obtain a repair methodology of satisfactory quality. Such strategies defined a working window with a voltage between 22 V and 28 V and an intensity of electric current between 190 A and 220 A. For the analyzed material, the best response values were at the base intensity of electric current of 80 A, base time of 1.47 ms, drop separator intensity of electric current of 110 A, drop separator time of 0.5 ms, the peak intensity of electric current of 375 A and peak time of 2.2 ms, corresponding to a working frequency of 240 Hz. With this work methodology, using signal analysis and profiling filming, it is possible to adapt the choice of process parameters to any material with energy and cost savings. These techniques are highly efficient and low-cost. In addition, the GMAW-P transfer mode allows quality work with the intensity of electric current values lower than conventional GMAW. © 2023, The Authors. All rights reserved.

关键词： Drops

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Development of an Acoustic Flowmeter for Low Flow Rates

SSRN

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SSRN 2022年

作者： de Souza, Nilmar dos Santos Miranda, Igor Dantas Khun, André Romeiro, Lucas de Araujo Wanderley Fontes, Cristiano Hora de Castro Lima, Antonio Cezar Mechatronics Program Federal University of Bahia Brazil Center for Science and Technology in Energy and Sustainability Federal University of the Recôncavo of the Bahia Brazil Center for Exact Sciences and Technology Federal University of the Recôncavo of the Bahia Brazil Industrial Engineering Program Federal University of Bahia Brazil Department of Electrical Engineering Polytechnic School Federal University of Bahia Brazil

The use of non-intrusive acoustic flow meters for residential applications has been little explored. This work presents the development of a non-intrusive acoustic instrument for low water flow rates measured at a PVC pipe knee. A chest piece of stethoscope with an electret microphone was used, and 10 collection cycles were performed, in a range of 16 to 488 liters/hour (lph). The results show that there is a quadratic relationship between the standard deviation of the acoustic signal and the water flow, and the existence of a transition region is predicted. Furthermore, there was an exponential relationship between the standard deviation of the detail coefficients of the Wavelet Transform and the energy of the approximation coefficients with the fluidic flow. Thus, as far as we know, this is the first time that a correlation between the acoustic noise generated by a low flow of water on a residential scale is presented. This approach represents a potential alternative for monitoring water consumption at specific points in a residence, which, in turn, enables the identification of user patterns and contributes to the management of the distribution of water resources in a given location. © 2022, The Authors. All rights reserved.

关键词： Wavelet transforms

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Georeferencing System for Maneuvering of Autonomous Truck in Mining Environment

Georeferencing System for Maneuvering of Autonomous Truck in...

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International Carpathian Control Conference (ICCC)

作者： Emanuel Francisco Vicentini Carvalho Lucas Silva De Oliveira Murillo Ferreira Dos Santos Paolo Mercorelli Matheus Carvalho Gouveia Master Degree Program in Automation and Systems CEFET-MG Leopoldina Brazil Department of Mechatronics Engineering CEFET-MG Divinópolis MG Brazil Department of Electroelectronics CEFET-MG Leopoldina Brazil Institute for Production Technology and Systems (IPTS) Leuphana University of Lüneburg Lüneburg Germany Electrical Engineering B. Sc UFJF-MG Juiz de Fora MG Brazil

ISBN: (数字)9798350350708

ISBN: (纸本)9798350350715

Mining automation began in the 1960s to increase safety in underground mines. Today, robotic and autonomous systems perform specific mining activities, creating new oppor-tunities and a more efficient and safe industry. This paper proposes a novel solution for instrumentation for autonomous trucks working in open-pit mines, specifically during the parking maneuver to load ore. In this case, new hardware and firmware are developed to compute the future coordinates of the excavator bucket using two Global Positioning Systems (GPS) receivers. In this approach, employing the concept of geometry and information from the GPS receivers, the future coordinates of the excavator bucket are calculated and made available to control the system, parking the autonomous truck in the desired position. The results demonstrate the accurate positioning of the off-highway truck during the ore-loading process, allowing for the correct execution of the truck's autonomous positioning maneuver.

关键词： Automation Receivers Excavation Hardware Real-time systems Safety Vehicle dynamics

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Hydrogen Powered Fuel Cell Systems - A Review

Hydrogen Powered Fuel Cell Systems - A Review

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IEEE International Conference on Emerging & Sustainable Technologies for Power & ICT in a Developing Society (NIGERCON)

作者： Sunday A. Afolalu Temitayo S. Ogedengbe Moses E. Emetere Stella I. Monye Monye N. Snow Dept. of Mechanical and Mechatronics Engineering Department Afe Babalola University Ado-Ekiti Nigeria Dept. of Mechanical Science University Johannesburg South Africa Dept. of Mechanical Engineering Department Nile University of Nigeria Abuja Dept. of Physics Program. Bowen University Iwo Osun State Nigeria Dept. of Information Communication Technology University of Delta Agbor Delta State Nigeria

ISBN: (数字)9798331542559

ISBN: (纸本)9798331542566

The urgent need for sustainable energy sources has fuelled research into alternative power generation technologies. Among these, hydrogen fuel cells have emerged as promising candidates due to their high energy efficiency and zero-emission profile. This study presents a review on hydrogen energy and fuel cell. The design principles for fuel cells, hydrogen production methods, hydrogen storage technologies and the integration of fuel cells into power systems have been discussed. The review concludes with a discussion on technological advances in fuel cell materials and environmental impacts/sustainability of hydrogen fuel cells.

关键词： Renewable energy sources Humanities Hydrogen storage Reviews Hydrogen Fuel cells Production Power systems Sustainable development Power generation

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