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International Journal of mechatronics and Applied Mechanics 2025年第19期2025卷 205-215页

作者： Popescu, Ionela-Mihaela Popescu, Valentin-Serban Vasilescu, Alexandra-Gabriela Constantin, Victor Avram, Mihai National University of Science and Technology Politehnica Bucharest Romania National Institute of Research and Development in Mechatronics and Measurement Technique Bucharest Romania

This paper aims to analyze the evolution of wind turbines in the last decade and place it in the context of environmental changes that have occurred in recent years. The use of artificial intelligence, genetic algorithms, and machine learning in the field of wind energy may increase energy production and ensures predictive maintenance of installations. Implementing AI at the level of wind turbine control systems brings benefits such as: reduced data analysis time;standardized data labeling;increased performance and reduced maintenance costs. Another method for determining the need for repairs is the use of machine learning, which can reduce downtime and extend the life of the turbine. Genetic algorithms can increase the efficiency of blade pitch and durability of vertical axis wind turbines. Analysis of system errors and multiple key parameters facilitates maintenance and reduces operating costs. These advanced control methods for both horizontal axis and vertical axis wind turbines increase efficiency, provide optimized system parameters and control designs as output. The production of wind turbine components and the reduction of carbon dioxide emissions can be achieved through 3D printing technology. Using environmentally friendly materials such as polylactic acid to make parts in the construction of wind turbines reduces the pollution problems generated in the production process. This makes wind turbines a sustainable and environmentally friendly power generation device. The use of advanced materials reduces the mass of turbine components, which makes it much easier to transport and install. In addition to these advantages, transportation costs are also reduced because it no longer requires large transport vehicles and traffic disruption. © 2025 The Author(s).

关键词： Vertical axis wind turbine

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IMPACT OF UV POST PROCESSING ON SIMPLE 3D PRINTED PARTS USING MASKED STEREOLITHOGRAPHY

International Journal of Mechatronics and Applied Mechanics

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International Journal of mechatronics and Applied Mechanics 2024年第18期2024卷 86-92页

作者： Popescu, Valentin-Serban Popescu, Ionela-Mihaela National Institute of Research and Development in Mechatronics and Measurement Technique Bucharest Romania National University of Science and Technology Politehnica Bucharest Romania

The main subject of this paper are the measurements done after the post-processing of 3D printed parts made using masked stereolithography (MSLA) 3D printing technology, after they have been previously detached from the construction platform and cleaned with isopropyl alcohol. This 3D printing technology requires resin, which mainly uses photopolymers, which are a type of plastic containing photoinitiators. This resin is hardened using a UV LED system and lenses to create the 3D part, layer by layer. The type of resin used can greatly influence the dimensional accuracy of the printed parts. Essential to this technology is the LCD screen that works like a mask, blocking the parts of the resin that doesn't need to be cured by UV light. This screen has a fixed resolution, a fixed pixel size, which affects the dimensional accuracy of the layers. Also, the post-processing time with additional UV light can affect the final dimensions of the printed parts and their resistance, too short exposure time having a negative effect, the parts are still soft, and too long exposure time, also having a negative effect, making the parts brittle. © 2024, Cefin Publishing House. All rights reserved.

关键词： Stereolithography

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A Novel Rehabilitative Soft Robotics Knee Brace for ACL deficient patients 6

A Novel Rehabilitative Soft Robotics Knee Brace for ACL defi...

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6th International Congress on Human-Computer Interaction, Optimization and Robotic Applications, HORA 2024

作者： Naghibi, Hamid Khambati, Husain Ryolo, Andrea Abayazid, Momen Robotics and Mechatronics group University of Twente Enschede Netherlands VDL Enabling Technology Group Technology and Development Eindhoven Netherlands

ISBN: (纸本)9798350394634

Anterior Cruciate Ligament rupture is one of the most common injuries contributing to osteoarthritis progression due to knee motion alteration. Reconstructive surgery often fails to recover the intact knee stability. Rehabilitative treatments as a non-invasive solution can used to strengthen the Hamstring muscles which contributes to the anterior-posterior stability. These exercises are very time and cost expensive . in order to overcome the non-effective passive knee braces in the market, in the current study A soft robotics knee brace was developed in order to improve anterior-posterior stability by contributing to Hamstring muscles group activation. The soft robotics knee brace can be actuated inside MRI which enables direct evaluation of the effectiveness. In order to validate the effectiveness of the developed knee brace two experiments were performed, seated leg curl and gait analysis. The outcomes confirmed that the soft robotics knee brace could reduce the Hamstring group activation. © 2024 IEEE.

关键词： Muscle

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Fully tunable Fabry-Pérot cavity based on MEMS Sagnac loop reflector with ultra-low static power consumption

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Microsystems & Nanoengineering 2024年第4期10卷 355-365页

作者： Young Jae Park Man Jae Her Youngjae Jeong Dong Ju Choi Dong Uk Kim Min Gi Lim Myung Seok Hong Hyug Su Kwon Kyoungsik Yu Sangyoon Han Department of Robotics and Mechatronics Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Republic of Korea School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Agency for Defense Development DaejeonRepublic of Korea

The Fabry-Pérot interferometer,a fundamental component in optoelectronic systems,offers interesting applications such as sensors,lasers,and *** this work,we show a tunable Fabry-Pérot cavity consisting of tunable Sagnac loop reflectors(SLRs)and phase shifters based on electrostatic microelectromechanical(MEMS)*** fabrication process of the device is compatible with the standard wafer-level silicon photonics fabrication *** electrostatic actuation mechanism provides well-balanced,scalable pathways for efficient tuning *** extinction ratio of the continuously tunable SLRs’reflectivity is larger than 20 *** 2πphase shifting is achieved,and response times of all the components are less than 25μ*** actuators have extremely low static power,measuring under 20 fW and the energy needed for tuning is both below 20 pJ.

关键词： tunable tuning interferometer

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RESEARCH ON THE IMPLEMENTATION OF THE HYDROGEN AND OXYGEN-BASED FUEL CELL RENEWABLE ENERGY SOURCE

International Journal of Mechatronics and Applied Mechanics

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International Journal of mechatronics and Applied Mechanics 2024年第15期2024卷 120-126页

作者： Ion, Dennis Ştefan Zapciu, Aurel National Institute of Research and Development in Mechatronics and Measurement Technique Bucharest Romania National University of Science and Technology Politehnica Bucharest Bucharest Romania SC Cautis JB93 SRL Romania

Renewable energy sources were first utilized around 200 BCE, approximately 2000 years ago. The initial form of renewable energy was the water mill, which operated on friction, harnessing hydro-energy through the rotation of its wheel, converting it into mechanical energy. The second such renewable energy source was the windmill, which transformed wind energy into mechanical energy. From the recent past to the present, an increasing number of methods for creating renewable energy sources have emerged, such as nuclear energy, which converts chemical energy into electrical energy, hydroelectric power plants that convert hydro-energy into electrical energy, geothermal energy that harnesses heat from the earth to produce electricity, and even photovoltaic panels, descendants of solar panels, capable of accumulating energy from any light source, unlike traditional solar panels that only captured energy from sunlight . This paper provides a review of research on these systems in terms of thermodynamic performance, particularly focusing on energy analysis and exergy. © 2024, Cefin Publishing House. All rights reserved.

关键词： Oxygen

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Structural design for open gap stamping press

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International Journal of Advanced Manufacturing technology 2024年第1-2期134卷 853-870页

作者： Chang, Chia-Hung Liao, Bing-Jyun Kuo, Chun-Chih Department of Mechatronics Engineering National Kaohsiung University of Science and Technology (First Campus) Metal Product Development Technology R & amp D Center National Kaohsiung University of Science and Technology (First Campus)

The proposed paper uses Taguchi design of experiments and topology optimization to design a low throat angle and lightweight structure of an open gap (C-frame) stamping press. First, finite element analysis was used for discussing the effects of frame structure deformation by various parameters, such as upper round corner (R₁), eccentric distance of upper round corner (L₁), throat depth (K), lower round corner of throat (R₂), and eccentric distance of lower round corner of throat (L₂). With throat angle as the quality objective, we conducted single-objective optimization using Taguchi’s smaller-the-better formula. The optimal values of the quality objectives were as follows: R₁ was 60 mm, L₁ was 30 mm, L₂ was 340 mm, and R₂ was 48 mm, the resulting throat angle of which was 0°1′18.99″. The throat angle resulting from this parameter combination in the static analysis with 44% force area was 0°1′18.50″. The weight of the frame was approximately 5971 kg. We also confirmed the influence of the four process parameters on the quality objectives and their mathematical relationships using analysis of variance (ANOVA) and multiple regression analysis. Next, LSM (level set method) topology optimization was used to create an optimized structure. The analysis of the optimized structure using LSM showed that the deformation with 100% force area increased by 2.6%. However, the throat angle decreased by 0°0′0.78″, and the mass of the machine dropped by 444 kg. The proposed paper shows the process of using a combination of optimization methodologies to create an optimal structure, and the results show that the proposed methodology can improve not only throat angle but also structure weight. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.

关键词： Open gap stamping press Taguchi method Throat angle Topology optimization

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Fast Selective Laser-Induced Etching and Asymmetric 3D Hologram Laser Beam for Narrow Bezel Thin Display

Fast Selective Laser-Induced Etching and Asymmetric 3D Holog...

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International Symposium, Seminar, and Exhibition, Display Week 2024

作者： Kim, Hyungsik Kim, Jeongho Mishchik, Konstantin Jang, Seunghoon Hwang, Seyeon Lee, Kisang Jung, Woohyun You, Junghwa Ryu, Jekil Jeong, Seongho Roh, Cheollae Equipment Core Technology Development Team Mechatronics Technology Center Samsung Display 1 Samsung-ro Gyeonggi-do Giheung-gu Youngin-si17713 Korea Republic of

Here we demonstrate fast selective laser-induced etching (SLE) process with three-dimensional (3D) hologram optics to reduce display bezel thickness with cost effective methods. To apply fast SLE for display manufacturing, one-side etching process should be presumed to protect display active area. We developed one-side selective laser-induced etching with asymmetric 3D hologram laser beam satisfying with commercial mechanical strength. Faster etch process having etch rate 10 μm/min than common SLE, 1~3 μm/min was developed. Furthermore, we achieve that bezel thickness is 100 μm shorter than wheel scribing and CNC grinding. © 2024, John Wiley and Sons Inc. All rights reserved.

关键词： Laser beams

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HYSTERETIC DAMPING CHARACTERISTICS OF ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE USED IN HIP ARTHROPLASTIES

International Journal of Mechatronics and Applied Mechanics

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International Journal of mechatronics and Applied Mechanics 2023年第14期2023卷 7-13页

作者： Stoica, Alina-Maria Chișiu, Georgiana Stoica, Nicolae Alexandru Tudor, Andrei Cănănău, Sorin Mateescu, Geanina-Mihaela Cioboată, Daniela-Doina Ilie, George Faculty of Mechanical Engineering and Mechatronics National University of Science and Technology POLITEHNICA 313 Splaiul Independentei Bucharest060042 Romania National Institute for Research and Development in Mechatronics and Measurement Techniques 6-8 Soseaua Pantelimon Bucharest021631 Romania Transport Faculty National University of Science and Technology POLITEHNICA 313 Splaiul Independentei Bucharest060042 Romania

This paper presents a theoretical model and experimental results to determine the hysteretic damping coefficient and the energy losses from the indentation process. The characterization of the ultra-high molecular weight polyethylene in terms of hysteretic damping has an important role in the evaluation of the reliability of the hip arthroplasties subject to vibrations and movement. This is done experimentally with the indentation technique. Following the indentation tests, it is observed that for this material creep is present during the unloading stage. In this study two types of ultra-high molecular weight polyethylene (UHMWPE): non-irradiated (conventional) CPE and gamma-irradiated (cross-linked) XPE were analysed. The hysteretic damping coefficient help in the evaluation of energy losses for the visco-elasto-plastic deformations of the material. The hysteretic damping coefficient can be considered an essential material parameter in assessing the state of stress and deformation of the material. This study shows the comparison between the two materials and the effect that irradiation has on its damping properties. © 2023, Cefin Publishing House. All rights reserved.

关键词： Ultrahigh molecular weight polyethylenes

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Vehicle Dynamic Model Based Navigation Algorithm Requirement Analysis for Improving High Precision Inertial Navigation System

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Journal of Institute of Control, Robotics and Systems 2023年第10期29卷 818-825页

作者： Ko, Bo Sung Kim, Yong Hun Lee, Joo Han Park, So Jin Park, Seung Hyo Song, Jin Woo Department of Intelligent Mechatronics Engineering and Convergence Engineering for Intelligent Drone Sejong University Korea Republic of Naval Combat System PMO Marine Technology Research Institute Agency for Defense Development Korea Republic of

We propose an idea of using VDM (Vehicle Dynamic Model) as a constraint of INS (Inertial Navigation System) for improving the long term navigation performance. In order to suppress long term INS error, a constrained Kalman filter is applied. Before developing the high precision INS with various sensors and techniques, M&S (Modeling & Simulation) step is performed to define and validate the necessary requirements of the development, which here in this research, the requirement of VDM quality is analyzed. M&S is constructed using a 6-DOF submarine dynamic model and a guidance-navigation control model. It is assumed that the navigation sensor is consisted with an inertial measurement unit, EM-Log (Electromagnetic Log), and DM (Depth Module). Monte-Carlo simulation results confirm the effectiveness of the VDM employed by the constrained Kalman filter and requirements for VDM error are also analyzed. © ICROS 2023.

关键词： Inertial navigation systems

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A framework for robotic grasping of 3D objects in a tabletop environment

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Multimedia Tools and Applications 2024年 1-30页

作者： Ansary, Sainul Islam Mishra, Atul Deb, Sankha Deb, Alok Kanti Advanced Technology Development Centre IIT Kharagpur721302 India Mechanical Mechatronics Engineering Department LNMIIT Jaipur302031 India Mechanical Engineering Department IIT Kharagpur721302 India Electrical Engineering Department IIT Kharagpur721302 India

Automatic grasping of unknown 3D objects is still a very challenging problem in robotics. Such challenges mainly originate from the limitations of perception systems and implementations of the grasp planning methods for handling arbitrary 3D objects on real robot platforms. This paper presents a complete framework for robotic grasping of unknown 3D objects in a tabletop environment. The framework comprises of a 3D perception system for obtaining the complete point cloud of the objects, followed by a module for finding the best grasp by an object-slicing based grasp planner, a module for trajectory generation for pick and place operations, and finally performing the planned grasps on a real robot platform. The proposed 3D object perception captures the complete geometry information of the target object using two depth cameras placed at different locations. A hole-filling algorithm is also proposed to quickly fill the missing data points in the captured point cloud of target object. The object-slicing based grasp planner is extended to handle the obstacles posed by the neighbouring objects on a tabletop environment. Then, the proposed framework is tested on common household objects by performing pick and place operations on a real robot fitted with an adaptive gripper. Moreover, finding the best feasible grasp in the presence of neighbouring objects is also demonstrated such as avoiding the table-top and surrounding objects. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

关键词： Robot programming

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