检索结果-内蒙古大学图书馆

Failure surfaces morphology for specimens with stress concentrators using scanning electron microscopy

IOP Conference Series: Materials Science and engineering 2018年第6期444卷

作者： A David A M Comanici B Istrate C Munteanu P D Barsanescu 'Gheorghe Asachi' Technical University of Iaşi Department of Mechanical Engineering Mechatronics and Robotics Bvd Prof. Dr. doc. Dimitrie Mangeron 67 Iasi Romania

Materials develop different type of behaviours based on environmental conditions, loading conditions and different processing methods. Following up a previous work, the authors noticed that a mainly ductile material had features of brittle failure when the material was used for specimens with stress concentrators. Three types of specimens with stress concentrators were chosen and tests were carried out in order to develop a triaxial state of stress using a universal testing machine. After the failure, new specimens of the failure surface were debited and they were studied using SEM analysis. Elements of both brittle and ductile failures were identified and the study went further to verify the chemical composition of the material and the presence of impurities, if any. The authors concluded that the processing methods, the chemical composition and contamination of the material greatly influences the behaviour and type of failure of the specimens.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Some considerations on vibrations and noise of automotive HVAC system

引用

IOP Conference Series: Materials Science and engineering 2020年第1期997卷

作者： A M Vranău C Bujoreanu A Sachelarie V Caunii Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania S.C. Xtreme Chip S.R.L. Iasi Romania

The heating, ventilating and air conditioning system (HVAC) is one of the basic components of modern cars. At the same time, the system is a high energy consumer. The comfort of the passengers depends on its performance, and a malfunction influences the performance of the car. In the case of closed spaces (cars) factors such as humidity, air flow, noise and vibration influence the feeling of comfort. The purpose of this work is to analyse the vibrations and noise that occur when the air conditioning system works, because they are influencing the comfort of the passengers. Literature review is useful in designing more efficient system reducing noise and vibration in the passenger compartment.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Cover Image, Volume 10, Issue 2

引用

WIREs Cognitive Science 2019年第2期10卷

作者： Philipp Beckerle Claudio Castellini Bigna Lenggenhager Elastic Lightweight Robotics Group Robotics Research Institute Technische Universität Dortmund Dortmund Germany Institute for Mechatronic Systems in Mechanical Engineering Technische Universität Darmstadt Darmstadt Germany Institut of Robotics and Mechatronics DLR German Aerospace Center Oberpfaffenhofen Germany Cognitive Neuropsychology Department of Psychology University of Zurich Zurich Switzerland

The cover image is based on the Focus Article Robotic interfaces for cognitive psychology and embodiment research: a research roadmap , by Philipp Beckerle, Claudio Castellini, and Bigna Lenggenhager, https://***/10.1...

关键词：

来源：评论

学校读者我要写书评

暂无评论

Effect of dielectric barrier discharge on ceramic surface properties

引用

Journal of Physics: Conference Series 2020年第1期1520卷

作者： Furong Yao Mingqiang Pan Zongjian Zhu Jizhu Liu Yangjun Wang Haibo Huang Liguo Chen College of Mechatronics Engineering &Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou Jiangsu China Jiangsu Key Laboratory for Advanced Robotics Technology Soochow University Jiangsu China Robotics and Microsystems Center Soochow University Suzhou Jiangsu China

Ceramics, as a commonly used insulating and thermally conductive material, has a wide range of applications in the field of micro-nano manufacturing. In recent years, research on ceramic bonding has also increased. However, ceramic bonding has some problems such as bonding failure and low bonding quality. Learning from other commonly used bonding materials, the important factor for the success of bonding is the surface properties of the material. Therefore, in this study, the surface of ceramic was treated by dielectric barrier discharge (DBD) to improve surface properties. The effects of dielectric barrier discharge on the surface properties of ceramic is investigated from the three aspects: hydrophilic angle, surface energy and surface morphology. In the dielectric barrier discharge experiment, blind via glass is used as the blocking medium for the upper electrode. The lower electrode is covered by ceramic, and the ceramic is also the material to be treated. The influence of processing time, discharge voltage and discharge frequency on the treatment effect is investigated in the experiment. The hydrophilic angle and surface energy of the treated ceramics are measured and calculated by contact angle measuring instrument, and the surface morphology was observed by scanning electron microscopy. The results show that the longer the discharge treatment time is, the larger the discharge output voltage is, the smaller the discharge gap is, the faster the hydrophilicity of the surface of the ceramic sheet is, and the higher the activation energy is. The damage of the ceramic surface after treatment is small, and the impurities on the surface are destroyed. In general, the surface properties of ceramics after dielectric barrier discharge treatment are better than before.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Issues to be considered on obtaining plant models for formal verification purposes

引用

IOP Conference Series: Materials Science and engineering 2016年第1期147卷

作者： R Pacheco L Gonzalez M Intriago J Machado G Prisacaru D Olaru Mechanical Engineering Department University of Minho Guimarães Portugal MEtRICs Research Center University of Minho Guimarães Portugal Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania

The development of dependable software for mechatronic systems can be a very complex and hard task. For facilitating the obtaining of dependable software for industrial controllers, some powerful software tools and analysis techniques can be used. Mainly, when using simulation and formal verification analysis techniques, it is necessary to develop plant models, in order to describe the plant behavior of those systems. However, developing a plant model implies that designer takes his (or her) decisions concerning granularity and level of abstraction of models; approach to consider for modeling (global or modular); and definition of strategies for simulation and formal verification tasks. This paper intends to highlight some aspects that can be considered for taking into account those decisions. For this purpose, it is presented a case study and there are illustrated and discussed very important aspects concerning above exposed issues.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Preliminary results for the multi-robot, multi-partner, multi-mission, planetary exploration analogue campaign on mount etna

Preliminary results for the multi-robot, multi-partner, mult...

引用

IAF Space Exploration Symposium 2021 at the 72nd International Astronautical Congress, IAC 2021

作者： Wedler, Armin Möller, Marcus G Schuster, Martin J Durner, Maximilian Brunner, Sebastian G Lehner, Peter Lehner, Hannah Dömel, Andreas Vayugundla, Mallikarjuna Steidle, Florian Sakagami, Ryo Meyer, Lukas Smisek, Michal Störzl, Wolfgang Schmitz, Nicole Vodermayer, Bernhard Prince, Andre F Staudinger, Emanuel Hellerer, Matthias Lichtenheldt, Roy Dietz, Enrico Braun, Christian Rebele, Bernhard Boerdijk, Wout Giubilato, Riccardo Reill, Josef Kuhne, Moritz Lee, Jongseok Vilacampa, Alejandro F Bargen, Info V Schröder, Susanne Frohmann, Sven Seel, Fabian Triebel, Rudolph Lii, Neal Y Bischoff, Esther Kille, Sean Wormnes, Kjetil Pereira, Aaron Carey, William Rossi, Angelo P Thomsen, Laurenz Graber, Thorsten Kruger, Thomas Kyr, Peter Börner, Anko Bussmann, Kristin Paar, Gerhard Bauer, Arnold Völk, Stefan Kimpe, Andreas Rauer, Heike Höbers, Heinz-Wilhelm Bals, Johann Hohmann, Sören Asfour, Tamim Foing, Bernhard Albu-Schäffer, Alin Olimpiu Institute of Robotics and Mechatronics Mönchener Str. 20 Webling82234 Germany Institute of Optical Sensor Systems Rutherfordstr. 2 Berlin12489 Germany Institute of System Dynamics and Control Mönchener Str. 20 Weßling82234 Germany Institute of Planetary Research Rutherfordstr. 2 Berlin12489 Germany Mobile Rocket Base MönchenerStr. 20Webl 82234 Germany Joanneum Research Steyrergasse 17 GrazA-8010 Austria Solenix Engineering GmbH Spreestr. 3 Darmstadt64295 Germany ESTEC Noordwijk Netherlands University of Leiden Netherlands Institute of Control Systems Kaiserstr. 12 Karlsruhe76131 Germany Kaiserstr. 12 Karlsruhe76131 Germany Jacobs University Bremen Planetary Science Campus Ring 1 Bremen28759 Germany

ISBN: (纸本)9781713842965

This paper was initially intended to report on the outcome of the twice postponed demonstration mission of the ARCHES project. Due to the global COVID pandemic, it has been postponed from 2020, then 2021, to 2022. Nevertheless, the development of our concepts and integration has progressed rapidly, and some of the preliminary results are worthwhile to share with the community to drive the dialog on robotics planetary exploration strategies. This paper includes an overview of the planned 4-week campaign, as well as the vision and relevance of the mission towards the planned official space missions. Furthermore, the cooperative aspect of the robotic teams, the scientific motivation, the sub task achievements are summarised. © 2021 International Astronautical Federation, IAF. All rights reserved.

关键词： robotics

来源：评论

学校读者我要写书评

暂无评论

LB1712 A clinical study of atomic-force microscopy-based rapid atopic dermatitis severity assessment

引用

Journal of Investigative Dermatology 2023年第9期143卷 B18-B18页

作者： J. Pereda H. Liao J. Wang E. Raun L.O. Nørgaard F.E. Dons E. Hwu Health Technology Danmarks Tekniske Universitet Lyngby Hovedstaden Denmark Mechanical Engineering National Taiwan University Taipei Taiwan Department of Mechatronics and Robotics Technische Universitat Munchen Munchen Bayern Germany

来源：评论

学校读者我要写书评

暂无评论

Some aspects regarding the influence of humidity on the tensile characteristics of GFRP composite material

引用

IOP Conference Series: Materials Science and engineering 2020年第1期997卷

作者： C Morăraş P D Barsanescu C A Tugui Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania Materials Processing Technologies and Equipment Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania

Composite materials have experienced great development in recent years, replacing traditional materials. Designed as metastructures, their properties recommend them in different fields, from sports materials to those in aeronautic and energy industries. In combinations of metallic layers or composites based on carbon/glass fibers, the properties of these materials allowed both the miniaturization of devices and the construction of large lightweight components. The paper aims to present the results of the tensile evaluation of the glass fiber reinforced plastics (GFRP), used in the construction of wind turbine blades. The blades are the most critical components of the wind turbines, being exposed to the damage and the defects that appear during operation can lead to the loss of the integrity of the blade structure. In order to increase the lifetime and to study the defects during operation, tensile tests were performed to determine the mechanical properties on a dry specimen, reinforced at [0 ° / 90 °], and the results obtained were compared with two specimens subjected to immersion in water for 14 and 21 days, two other specimens were immersed in seawater (Black Sea) for 14 and 21 days and one specimen was immersed in liquid nitrogen for 4 days.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Semi-local one-dimensional optical wave turbulence

arXiv

引用

arXiv 2024年

作者： Colléaux, Clément Skipp, Jonathan Laurie, Jason Nazarenko, Sergey Université Côte d’Azur CNRS-Institut de Physique de Nice 17 Rue Julien Lauprêtre Nice06200 France Department of Applied AI and Robotics College of Engineering and Physical Sciences Aston University Aston Triangle BirminghamB4 7ET United Kingdom Aston Fluids Group Aston University Aston Triangle BirminghamB4 7ET United Kingdom Department of Mechatronics and Biomedical Engineering College of Engineering and Physical Sciences Aston University Aston Triangle BirminghamB4 7ET United Kingdom

We study one-dimensional optical wave turbulence described by the 1D Schrödinger–Helmholtz model for nonlinear light propagation in spatially nonlocal nonlinear optical media such as nematic liquid crystals. By exploiting the specific structure of the nonlocal response, we derive a reduced wave kinetic equation under a semi-local approximation that permits the study of weak-wave turbulent cascades. We explore the realisability of the wave turbulence predictions and demonstrate new turbulent behaviour related to spatial nonlocality. Moreover, we show strong dependence of the wave turbulence to the possible presence of incoherent solitonic structures. © 2024, CC BY.

关键词： Nonlinear optics

来源：评论

学校读者我要写书评

暂无评论

Outer-Linearization-Based Optimization Algorithm for Decentralized Control Design in Flexure-Linked H-Gantry

Outer-Linearization-Based Optimization Algorithm for Decentr...

引用

IEEE/ASME International Conference on Advanced Intelligent mechatronics

作者： Jun Ma Si-Lu Chen Wenyu Liang Xiaocong Li Chek Sing Teo Arthur Tay Abdullah Al Mamun Kok Kiong Tan Department of Electrical and Computer Engineering National University of Singapore Singapore Zhejiang Provincial Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology Chinese Academy of Sciences Ningbo Zhejiang China Department of Electrical and Computer Engineering National Universit of Singapore Singapore Mechatronics Group Singapore Institute of Manufacturing Technology Singapore

The dual-drive H-gantry (DHG) is widely used for high-speed high-precision Cartesian motion control applications. Compared with the rigid-linked gantry design, the flexure-linked design is able to prevent the damage of the cross-arm because a small degree of rotation angle is allowed. Nevertheless, the flexure-linked design possibly induces the resonance of the gantry because of the chattering of control signals. To maintain the precision tracking of two carriages and minimize the chattering of control efforts, we aim to seek the most suitable flexure joints among the available ones and optimize the decentralized feedback controller parameters under parametric uncertainties. The mechatronic design problem is formulated as an H_2 guaranteed cost control problem. All the stabilizing feedback controller gains are parameterized over a convex set, from here, numerical procedures are developed to obtain the global optimum by means of an outer-linearization-based optimization algorithm. Experiments are carried out and the results successfully validate the optimality and the robustness of the proposed design approach.

关键词： Decentralized control Optimization Uncertainty Feedforward systems Adaptive control Robustness Actuators

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：