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Reverse engineering methodology applied for the design of a light aircraft composite wheel cover. Numerical simulations for aerodynamic and structural analysis

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AIP Conference Proceedings 2024年第1期3094卷

作者： Axel Fournier Malek Guenni Carles Morell-Moratal Nicolae-Emmanuel Raiu Irina-Carmen Andrei Adriana Ştefan Cristina Pelin Gina Florica Stoica Nicoleta Crişan Delia Prisecaru Cristian Stoica Anca Greculescu Corina-Elena Boşcoianu Emil Costea E.N.I.T. - École Nationale d’Ingénieurs de Tarbes Tarbes FRANCE University “POLITEHNICA” of Bucharest Faculty of Engineering in Foreign Languages French Stream Bucharest ROMANIA Universitat Politècnica de València Vilanova i la Geltrú School of Engineering (Universitat Politècnica de Catalunya) Valencia SPAIN University “POLITEHNICA” of Bucharest Faculty of Mechanical Engineering and Mechatronics Bucharest ROMANIA I.N.C.A.S. - National Institute for Aerospace Research “Elie Carafoli” B-dul Iuliu Maniu 220 Sector 6 Bucharest 061126 ROMANIA University “POLITEHNICA” of Bucharest Faculty of Mechanical Engineering and Mechatronics Machine Parts and Tribology Department Splaiul Independenfei 313 Sector 6 060042 Bucharest ROMANIA University “POLITEHNICA” of Bucharest Faculty of Industrial Engineering and Robotics Strength of Materials Department Splaiul Independenfei 313 Sector 6 060042 Bucharest ROMANIA COMOTI – Romanian Research and Development Institute for Gas Turbines B-dul Iuliu Maniu nr. 220D Sector 6 061126 Bucharest ROMANIA

This paper presents the results of the research stage focused on applications of composite materials in aviation, carried on by an international team of European Project Semester students at the National Institute for Aerospace Research "Elie Carafoli" – INCAS, as Research Partner of the University POLTEHNICA of Bucharest, as Organizer and EUROPEAN PROJECT SEMESTER Provider. The study case is a light aircraft wheel cover. The objectives are set to the determination of the body geometry by reverse engineering techniques, modeling and numerical simulations for aerodynamics and structural analysis. A scale reduced demonstrator was obtained through 3D printing.

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Laboratory experiments with application to a light aircraft composite wheel cover

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AIP Conference Proceedings 2024年第1期3094卷

作者： Axel Fournier Malek Guenni Carles Morell-Moratal Nicolae-Emmanuel Raiu Irina-Carmen Andrei Adriana Ştefan Cristina Pelin Gina Florica Stoica Nicoleta Crişan Delia Prisecaru Cristian Stoica Anca Greculescu Corina-Elena Boşbrcoianu Emil Costea E.N.I.T. - École Nationale d’Ingénieurs de Tarbes Tarbes FRANCE University “POLITEHNICA” of Bucharest Faculty of Engineering in Foreign Languages French Stream Bucharest ROMANIA Universitat Politècnica de València Vilanova i la Geltrú School of Engineering (Universitat Politècnica de Catalunya) Valencia SPAIN University “POLITEHNICA” of Bucharest Faculty of Mechanical Engineering and Mechatronics ROMANIA I.N.C.A.S. - National Institute for Aerospace Research “Elie Carafoli” B-dul Iuliu Maniu 220 Sector 6 Bucharest 061126 ROMANIA University “POLITEHNICA” of Bucharest Faculty of Mechanical Engineering and Mechatronics Machine Parts and Tribology Department Splaiul Independenfei 313 Sector 6 Bucharest 060042 ROMANIA University “POLITEHNICA” of Bucharest Faculty of Industrial Engineering and Robotics Strength of Materials Department Splaiul Independenfei 313 Sector 6 Bucharest 060042 ROMANIA COMOTI – Romanian Research and Development Institute for Gas Turbines B-dul Iuliu Maniu nr. 220D Sector 6 Bucharest 061126 ROMANIA

This paper presents the results of the research stage focused on applications of composite materials in aviation, carried on by an international team of European Project Semester students at the National Institute for Aerospace Research "Elie Carafoli" – INCAS, as Research Partner of the University POLTEHNICA of Bucharest, as Organizer and EUROPEAN PROJECT SEMESTER Provider. The study case is a light aircraft wheel cover. The objectives are set to the laboratory experiments in case of a light aircraft composite wheel cover.

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Correction: Dynamic response study of Ti3C2-MXene films to shockwave and impact forces

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RSC advances 2021年第12期11卷 6448页

作者： Shreyas Srivatsa Pavithra Belthangadi Shivakarthik Ekambaram Manu Pai Prosenjit Sen Tadeusz Uhl Saurabh Kumar Krzysztof Grabowski M M Nayak Academic Center for Materials and Nanotechnology (ACMiN) AGH University of Science and Technology (UST) Krakow Poland sshreyas@agh.edu.pl. Centre for Nano Science and Engineering (CeNSE) Indian Institute of Science (IISc) Bangalore India saurabh2203@iisc.ac.in. Atomic Molecular and Optical Physics Division Physical Research Laboratory Ahmedabad India. Instrumentation and Applied Physics Indian Institute of Science (IISc) Bangalore India. Department of Robotics and Mechatronics AGH University of Science and Technology Krakow Poland.

[This corrects the article DOI: 10.1039/D0RA04879H.].

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Development of a methodology and research results for comparing the wear of friction surfaces for disc brakes of passenger cars

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AIP Conference Proceedings 2024年第1期3104卷

作者： Alexander Nazarov Sergey Krivoshapov Nikolay Sergienko Volodymyr Kulay Department of “Technical Operation and Service of Vehicles” named after Professor Govorushchenko N.Ya. Faculty of Automotive Kharkov National Automobile and Highway University 25 Yroslava Mudrogo Str. Kharkov Ukraine Department of “Automobile and tractor construction” named after Professor Govorushchenko N.Ya. Institute of Mechanical Engineering and Transport National Technical University "Kharkov Polytechnic Institute" 2 Kirpychova Str. Kharkov Ukraine Department of "Industrial mechanical engineering and mechatronics" Educational and Scientific Institute of Information Technologies and Robotics by "Poltava Polytechnic named after. Y. Kondratyuk" 24 Pershotravnevy prospect. Poltava Ukraine

It was not sufficient to merely establish the amount of wear on friction surfaces in brake mechanisms for a certain period of time. The principal objective is to determine the intensity of wear on the friction mating surfaces in general, as this will enable us to evaluate the reliability of the braking systems in passenger vehicles under operating conditions. The main purpose of the paper is to substantiate a methodology for assessing the wear intensity in frictional interfaces specifically for disc brakes that are installed in passenger vehicles. The primary objectives of the research work were identified. Conducted, accordingly, is the analysis to determine the extent to which various parameters for braking vehicles influence the wear on friction surfaces in disc brakes. Our substantiation is based on observed patterns of friction surfaces wear for disc brake mechanisms. A mathematical method was developed for estimating the intensity of wear on friction surfaces in disc brake mechanisms. Devised, additionally, was a technique for experimental research involving cyclic emergency braking of a vehicle on a dry horizontal asphalt concrete road. An analytical-graphical method was adopted to simulate the wear process on the friction surfaces of disc brakes for such passenger vehicles as: Daewoo Lanos, Lada Priora, Chevrolet Aveo and Forza. Each braking cycle consists of 30 emergency braking sequences, with initial braking speeds ranging from 10 to 35 m / s. The vehicle used was fully loaded and the aerodynamic force of air resistance was taken into account. The wear intensity of the friction interface during the braking cycle was evaluated by a special criterion. This criterion was calculated as the average sum of the friction interface wear ratios (as the difference between the disc and the friction lining wear) and the corresponding braking distance at which the wear occurred. For clarity, all measurement results were presented in both graphical and tabular formats.

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Study on structure and properties of CuZn40Pb alloy

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IOP Conference Series: Materials Science and engineering 2016年第1期133卷

作者： D C Achiţei M G Minciună P Vizureanu A V Sandu R Cimpoeşu B Istrate Department Technologies and Equipments for Materials Processing Gheorghe Asachi Technical University of Iasi D Mangeron Street no 41A Iasi Center of Excellence Geopolymer & Green Technology (CEGeoGTech) School of Materials Engineering Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia Faculty of Technology Universitas Ubudiyah Indonesia (UUI) JlnAlue Naga DesaTibang Banda Aceh Indonesia Department Materials Science Gheorghe Asachi Technical University of Iaşi D Mangeron Street no 41A Iasi Department of Mechanical Engineering Mechatronics and Robotics Gheorghe Asachi Technical University of Iaşi D Mangeron Street no 41A Iaşi

The paper shows aspects about the behavior of Cu-Zn-Pb alloys a subjected to the temperatures variation and corrosion resistance in saline medium (sea water). The chemical composition was determined by spectral analysis on optical spectrometer, type Foundry Masters. The experiments are completed by a microstructure analysis made on scanning electronic microscope.

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Performance and exergy analysis of an inclined solar still with baffle arrangements

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Heliyon 2023年第4期9卷 e14807页

作者： S Seralathan G Chenna Reddy S Sathish A Muthuram Joshuva Arockia Dhanraj Natrayan Lakshmaiya Karthikeyan Velmurugan Chatchai Sirisamphanwong Rattapon Ngoenmeesri Chattariya Sirisamphanwong School of Aeronautical Sciences Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Centre for Automation & Robotics (ANRO) Department of Mechatronics Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai India. Center for Alternative Energy Research and Development Khon Kaen University Thailand. Mechanical Engineering Division Faculty of Engineering Khon Kaen University Khon Kaen Thailand. Smart Energy System Integration Research Unit Department of Physics Faculty of Science Naresuan University Thailand. Research and Academic Service Faculty of Science Naresuan University Thailand. Department of Physics and General Science Faculty of Science Nakhon Sawan Rajabhat University Thailand.

This study presents the details of performance and exergy investigations on an inclined solar still with baffle arrangements. The shortage of consumable water creates the transformation of accessible brackish water into consumable water an unavoidable one and this can be accomplished utilizing sun-oriented refining. To remove drinkable water from pungent water, sun-oriented still is broadly utilized. To build the contact season of the pungent water with sunlight-based brilliance, perplex course of action is set to expand the opposition in the stream. This prompts more vanishing of brackish water. Therefore, the objective of this study is to improve freshwater yield. The experimental study is performed for two different mass flow rates (m = 0.0833 kg/min and m = 0.166 kg/min). An increase in the mass flow of water directly deteriorates the yield of fresh water. Highest accumulated freshwater yield is achieved as 2.908 kg/m day during the month of May for m = 0.0833 kg/min. The accumulated freshwater yield improved by 4.23% in comparison with inclined solar still designs. Moreover, the yield is better by 3.49%-61.56% in comparison with various solar still designs. Using RSM, a polynomial statistical model is specified to estimate as well as maximize the freshwater yield of ISSB. The exergy analysis for m = 0.0833 kg/min shows a maximum hourly exergy efficiency of 6.82%.

关键词： Baffle arrangements Exergy efficiency Inclined solar still Performance yield

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Non-invasive sensor methods used in monitoring newborn babies after birth, a clinical perspective

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Maternal health, neonatology and perinatology 2022年第1期8卷 9页

作者： Oana Anton Henry Dore Elizabeth Rendon-Morales Rodrigo Aviles-Espinosa Paul Seddon David Wertheim Ramon Fernandez Heike Rabe East Sussex NHS Healthcare Trust Eastbourne UK. oana.anton@***. Brighton and Sussex Medical School Academic Department of Paediatrics Royal Alexandra Children's Hospital Brighton UK. oana.anton@***. Robotics and Mechatronics Systems Research Group School of Engineering and Informatics University of Sussex Brighton UK. Brighton and Sussex Medical School Academic Department of Paediatrics Royal Alexandra Children's Hospital Brighton UK. School of Computer Science and Mathematics Faculty of Science Engineering and Computing Kingston University Kingston upon Thames UK. Department of Neonatology University Hospitals Sussex Brighton UK.

BACKGROUND:Reducing the global new-born mortality is a paramount challenge for humanity. There are approximately 786,323 live births in the UK each year according to the office for National Statistics; around 10% of these newborn infants require assistance during this transition after birth. Each year around, globally around 2.5 million newborns die within their first month. The main causes are complications due to prematurity and during delivery. To act in a timely manner and prevent further damage, health professionals should rely on accurate monitoring of the main vital signs heart rate and respiratory rate. AIMS:To present a clinical perspective on innovative, non-invasive methods to monitor heart rate and respiratory rate in babies highlighting their advantages and limitations in comparison with well-established methods. METHODS:Using the data collected in our recently published systematic review we highlight the barriers and facilitators for the novel sensor devices in obtaining reliable heart rate measurements. Details about difficulties related to the application of sensors and interfaces, time to display, and user feedback are explored. We also provide a unique overview of using a non-invasive respiratory rate monitoring method by extracting RR from the pulse oximetry trace of newborn babies. RESULTS:Novel sensors to monitor heart rate offer the advantages of minimally obtrusive technologies but have limitations due to movement artefact, bad sensor coupling, intermittent measurement, and poor-quality recordings compared to gold standard well established methods. Respiratory rate can be derived accurately from pleth recordings in infants. CONCLUSION:Some limitations have been identified in current methods to monitor heart rate and respiratory rate in newborn babies. Novel minimally invasive sensors have advantages that may help clinical practice. Further research studies are needed to assess whether they are sufficiently accurate, practical, and reliable to

关键词： Heart rate monitoring Newborn Novel sensors

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Use of 3D printed connectors to redesign full face snorkeling masks in the COVID-19 era: A preliminary technical case-study

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Annals of 3D Printed Medicine 2021年 3卷 100023-100023页

作者： Profili, Jacopo Brunet, Rafael Dubois, Émilie L Groenhuis, Vincent Hof, Lucas A Laboratoire d'Ingénierie de Surface Centre de Recherche sur les Matériaux Avancés Département de génie des mines de la métallurgie et des matériaux Université Laval 1045 avenue de la Médecine G1V 0A6 Québec Canada Centre de recherche du CHU de Québec-Université Laval Hôpital St-François d'Assise 10 rue de l'Espinay G1L 3L5 Québec Canada Department of Mechanical Engineering École de technologie supérieure 1100 rue Notre-Dame Ouest Montréal H3C 1K3 QC Canada Agence IMPAKT Scientifik 481 Rue Saint-Joseph E suite 2 Quebec Quebec City G1K 3B6 Robotics and Mechatronics University of Twente Enschede Netherlands

The COVID-19 pandemic resulted in severe shortages of personal protection equipment and non-invasive ventilation devices. As traditional supply chains could not meet up with the demand, makeshift solutions were developed and locally manufactured by rapid prototyping networks. Among the different global initiatives, retrofitting of full-face snorkeling masks for Non-Invasive-Ventilation (NIV) applications seems the most challenging. This article provides a systematic overview of rapid prototyped - 3D printed - designs that enable attachment of medical equipment to snorkeling masks, highlighting potential and challenges in additive manufacturing. The different NIV connector designs are compared on low-cost 3D fabrication time and costs, which allows a rapid assessment of developed connectors for health care workers in urgent need of retrofitting snorkeling masks for NIV purposes. Challenges and safety issues of the rapid prototyping approach for healthcare applications during the pandemic are discussed as well. When critical parameters such as the final product cost, geographical availability of the feedstock and the 3D printers and the medical efficiency of the rapid prototyped products are well considered before deploying decentralized 3D printing as manufacturing method, this rapid prototyping strategy contributed to reduce personal protective equipment and NIV shortages during the first wave of the COVID-19 pandemic. It is also concluded that it is crucial to carefully optimize material and printer parameter settings to realize best fitting and airtight connector-mask connections, which is heavily depending on the chosen feedstock and type of printer. © 2021 The Author(s)

关键词： 3D printed adapters COVID-19 pandemic Full-face snorkeling masks Fused deposition modelling Non-invasive ventilation systems Rapid prototyping

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Target localization intervention and prognosis evaluation for an individual with mild cognitive impairment

Brain‐X

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Brain‐X 2023年第3期1卷

作者： Weiping Wang Haiyan Zhao Chang He Yuanbo Cui Zhen Wang Alexander Hramov Ping Luan Xiong Luo Jipeng Ouyang Kurths Jürgen School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Shunde Graduate School University of Science and Technology Beijing Foshan Guangdong China Beijing Key Laboratory of Knowledge Engineering for Materials Science Beijing China Contribution: Writing - review & editing Department of Neurology Peking University Third Hospital Beijing China Contribution: Resources Zhen Wang The Center for Optical Imagery Analysis and Learning and School of Mechanical Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 China. Contribution: Writing - original draft The 6th Research Institute of China Electronics Corporation Beijing China The Center for Optical Imagery Analysis and Learning and School of Mechanical Engineering Northwestern Polytechnical University Xi'an Shaanxi China Chang He School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 China. Contribution: Investigation Center for Technologies in Robotics and Mechatronics Components Innopolis University Innopolis Russia Saratov State Medical University Saratov Russia Contribution: Data curation Guangdong Second Provincial General Hospital & Health Science Center Shenzhen Guangdong China Department of Neurology Shunde Hospital Southern Medical University Foshan Guangdong China Institute of Physics Humboldt-University Berlin Germany Potsdam Institute for Climate Impact Research Potsdam Germany

Currently, no specific treatments are available for Alzheimer's disease (AD). Mild cognitive impairment (MCI), the preclinical stage of AD, has a high possibility of reversing symptoms through neural regulation. A state dynamics model for single brain regions was developed to simulate blood oxygen level-dependent signals in a patient with early mild cognitive impairment. Subsequently, the analysis of functional connections was used to comprehensively consider multiple complex network centralities to locate the intervention targets, and a multiple brain region collaborative control scheme was designed. Finally, the reliability and effectiveness of the intervention were verified at the brain region and subnetwork levels. This technique provides a basis for future clinical diagnosis and treatment of AD and MCI.

关键词： adaptive pinning control Alzheimer's disease BOLD signals computational modeling Sub_network

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TRACKING CONTROL IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of Control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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