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Applicative CAD/CAM methodology for parameterization the rolling surface of railway wheels

UPB Scientific Bulletin, Series D: Mechanical Engineering 2015年第4期77卷 151-164页

作者： Ghionea, Ionuţ Gabriel Cioboatǎ, Doina Ghionea, Adrian Ćuković, Saša Dept. of Machine Manufacturing Technology University Politehnica of Bucharest Romania National Institute of Research and Development in Mechatronics and Measurement Technique Romania Dept. of Machines and Manufacturing Systems University Politehnica of Bucharest Romania Faculty of Mechanical Engineering Kragujevac University of Kragujevac Serbia

During the operation of the rolling stock, the contact surfaces of the wheels and rail become worn. The wear can lead to unwanted changes of the wheel and rail profile and, consequently, to changes in the properties of the contact surfaces which can direct to instability in the movement of vehicles. Therefore, the maintenance and repair of the rolling stock are important for traffic safety and passenger comfort. The paper presents the main types of defects that arise while rolling the wheels of the rail transport vehicles, some types of machine tools and cutting tools and recommended values of shaping or reshaping parameters. It is also presented a methodology of parametric representation of profiles and rolling surfaces using CAD techniques. There are analysed some profiles among those indicated in European norms in the field. © 2015, Politechnica University of Bucharest. All rights reserved.

关键词： Computer aided design

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Constrained iterative feedback tuning for robust high-precision motion control 19

Constrained iterative feedback tuning for robust high-precis...

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19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014

作者： Van Der Velden, Bart J.C.H. Oomen, Tom Heertjes, Marcel F. Control Systems Technology Group Department of Mechanical Engineering Eindhoven University of Technology Eindhoven Netherlands Mechatronics Technology Development ASML Veldhoven Netherlands

ISBN: (纸本)9783902823625

The aim of this paper is to extend iterative feedback tuning (IFT), which is a data-based approach for controller tuning, with robustness constraints. Hereto a constrained IFT problem is formulated that is solved by introducing a penalty function. Essentially, the gradient estimates decompose into (a) the well-known IFT gradients and (b) the gradients with respect to this penalty function. Experimental results obtained from the motion control systems of an industrial wafer scanner confirm enhanced performance with guaranteed robustness properties. © IFAC.

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Robust data-driven control for the stage synchronization problem 19

Robust data-driven control for the stage synchronization pro...

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19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014

作者： Heertjes, Marcel F. Galluzzo, Marco Kuindersma, Lucas Mechanical Engineering Department Eindhoven University of Technology Netherlands Dipartimento di Automatica e Informatica Politecnico di Torino Italy Mechatronics Technology Development ASML Netherlands

ISBN: (纸本)9783902823625

This paper discusses a method for introducing frequency-domain robustness constraints in a data-driven control design. The method is based on adaptive weighting filters used in a time-domain cost function to be minimized. In an iterative way, violation of the frequency-domain robustness constraints is checked by model prediction and accounted for by adapting the weighting filters. The method is applied to the stage synchronization problem in wafer scanners, which involves synchronization of the outputs of two motion systems, and will be discussed in view of both simulation results and experimental results. © IFAC.

关键词： Time domain analysis

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Methodology for estimation of probable location of VRU before impact using data from post-crash analysis

Methodology for estimation of probable location of VRU befor...

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International Research Council on the Biomechanics of Injury Conference, IRCOBI 2014

作者： Subramanian, Hariharan S. Mukherjee, Sudipto Chawla, Anoop Göhlich, Dietmar Department of Mechanical Engineering Indian Institute of Technology Delhi India Department of Product Development Methods and Mechatronics Technische Universität Berlin Germany

The incidence pattern of vulnerable road user (VRU) injury is modified by the transport infrastructure on the ground. Recent improvements in modelling capability introduce the possibility of evaluating performance of safety measures by incorporating a distribution instead of a single standardized test. The question addressed in this work is to estimate the probability distribution of crash initiation modes based on post-crash observations. A multi-body simulation based approach of using adaptive Markov Chain Monte Carlo (MCMC) sampling techniques implemented in statistical software "R" has been used. The two input variables under study were location of VRU along the lateral axis in front of vehicle and shape of vehicle front. The observed output was the locations of head hits on vehicle front profile. Simulation studies on VRU head crash locations from the German In-depth Accident Study (GIDAS) with the severity of injury and the crash vehicle details have been used. These converge to a distribution with mean around the center plane of the vehicle with spread of around 30 cm in one standard deviation.

关键词： Probability distributions

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Identification and assessment of vehicle seat adjuster sound quality

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International Journal of Vehicle Noise and Vibration 2014年第1-2期10卷 51-63页

作者： Wang, Xu Subic, Aleksandar Ren, He Shu, Hongli School of Aerospace Mechanical and Manufacturing Engineering RMIT University Bundoora East VIC 3083 Australia Jiangxi Professional Institute of Mechatronics Technology Nanchang North Development District ICP 05001964 Fenglin Road Jiangxi 330013 China

In order to improve operating noise performance of a seat adjuster mechanism, benchmarking measurements were conducted in different cars for six and eight types of seat adjustment operation. The six types of operation include: seat moving up, seat moving down, seat front end up, seat front end down, seat rear end up and seat rear end down. The eight types of operation include: seat moving forward, seat moving backward, seat moving up, seat moving down, seat front end up, seat front end down, seat rear end up and seat rear end down. The noise and vibration levels, sound quality and root causes of the noise problem have been analysed and discussed in this paper. The noise characteristics have been identified, and the psychoacoustic parameters have been used to quantify sound quality of the seat adjuster. The objective assessment results have been found to match well with subjective evaluation results. © 2014 Inderscience Enterprises Ltd.

关键词： Psychoacoustic

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Centralized monitoring method for isomeric heat treatment equipments

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Key Engineering Materials 2014年 584卷 81-86页

作者： Xiao, Xinhua Yang, Xiaofeng Yu, Hongbin Peng, Junqiang School of Mechanical Engineering Tianjin Polytechnic University Tianjin China Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology Tianjin China Product Development Department Tianjin Hongda Textile Machinery Co. Ltd Tianjin China

ISBN: (纸本)9783037858721

Heat treatment equipment are usually harmful to people, they need to be monitored remotely. As the fact that different types of equipment are used in factories, which leads to the problem that monitoring equipment is difficult. Therefore, research on remote centralized temperature monitoring system is necessary. The concept of isomeric equipment is proposed. The framework of monitoring system is established, which is constituted of temperature control instruments, monitoring server and clients. The functions of monitoring system are described, such as setting temperature, receiving temperature, showing the chart of temperature, accumulating and reusing heat treatment experience etc. The key technologies of monitoring system including dynamic protocol adapter and knowledge accumulation and reuse are also explained. Finally, the system is applied in a factory. The engineer can monitor almost all of the heat treatment equipment only by use the system in the office. Copyright © 2014 Trans Tech Publications, Switzerland.

关键词： Heat treatment

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Protection Tool for Distributed Denial of Services Attack

Protection Tool for Distributed Denial of Services Attack

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作者： Apiecionek, Lukasz Czerniak, Jacek M. Zarzycki, Hubert Institute of Technology Casimir the Great University in Bydgoszcz Bydgoszcz Poland Foundation for Development of Mechatronics in Bydgoszcz Bydgoszcz Poland Wroclaw School of Applied Informatics Horyzonty Wroclaw Poland

ISBN: (纸本)9783319069319

This article presents a potential tool for solving one of the biggest problems of security of network resources in computer networks. This problem are the Distributed Denial of Service attacks, which are able to block the computer networks. The authors introduce the nature of the problem and subsequently present a tool which provides a possible solution to deal with it. The proposed methods have already been tested in the range of their impact on network resources. The results presented in this article suggest that the method may be implemented as an efficient solution for some DDoS attacks. © Springer International Publishing Switzerland 2014.

关键词： Denial-of-service attack

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Transfer function modeling of parallel connected two three-phase induction motor implementation using LabView platform

Transfer function modeling of parallel connected two three-p...

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International Conference on Electrical Drives and Power Electronics (EDPE)

作者： R. Gunabalan P. Sanjeevikumar Frede Blaabjerg Patrick W. Wheeler Viliam Fedák Ahmet H. Ertas School of Electrical Engineering VIT University Chennai India Research & Development Ohm Technologies Chennai India Department of Energy Technology Aalborg University Denmark Department of Electrical & Electronics Engineering Nottingham University UK Department of Electrical Engineering & Mechatronics Technical University of Kosice Slovakia Biomedical Engineering Departments Karabuk University Karabuk Turkey

This paper presents the transfer function modeling and stability analysis of two induction motors of same ratings and parameters connected in parallel. The induction motors are controlled by a single inverter and the entire drive system is modeled using transfer function in LabView. Further, the software is used to perform the stability analysis of the parallel connected induction motor drive under unbalanced load conditions. It is very simple compared with the methods discussed so far to study the performance of the drive under unbalanced load conditions. Control design and simulation toolkits are used to model the drive system and to study the stability analysis. Simulation is done for various operating conditions and the stability investigation is performed for different load conditions and difference in stator and rotor resistances among the two motors.

关键词： Transfer functions Mathematical model Load modeling Inverters Induction motor drives MATLAB

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The development of micro ball supersonic impact test system

The development of micro ball supersonic impact test system

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8th International Symposium on Impact Engineering, ISIE 2013

作者： Chung, Dong-Teak Lee, Joo-Yeon Kim, Tae-Yeon Jin, Doo Han Kang, Hyung Korea University of Technology and Education School of Mechatronics and Mechanical Engineering Cheonan Chungnam 330-708 Korea Republic of 4-3 Agency for Defense Development Daejon Chungnam Korea Republic of

ISBN: (纸本)9783038351290

A micro ball supersonic impact test system was developed for the study of dynamic fracture of ceramic materials. This system consists of (1) low pressure gas gun, (2) sabot assembly and stopper block for velocity multiplication system, (3) velocity measurement device for sabot and ball, and (4) enclosed target box for final impact test. The principle of velocity multiplication system is similar to two stage gun. The plastic sabot assembly houses steel plunger and the void filled with silicone rubber. The sabot is stopped by the stopper block then the steel plunger inside the sabot compress the silicon rubber to high pressure to rupture the plastic membrane. Then the compressive energy of the silicon rubber is transferred to the ball. More than ten times of initial speed was attained. Non-contact velocity measurement system uses two set of ribbon laser with optical array sensor to measure the supersonic speed of the micro ball. Maximum speed up to 1200m/s for plastic and 600m/s for steel ball was attained. Perforation test of plastic film laminated glass window was successfully done by the developed impact system. © (2014) Trans Tech Publications, Switzerland.

关键词： Rubber

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Constrained Iterative Feedback Tuning for Robust High-Precision Motion Control

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IFAC Proceedings Volumes 2014年第3期47卷 4915-4920页

作者： Bart J.C.H. Van der Velden Tom Oomen Marcel F. Heertjes Control Systems Technology Group Department of Mechanical Engineering Eindhoven University of Technology Eindhoven The Netherlands Mechatronics Technology Development ASML Veldhoven The Netherlands

The aim of this paper is to extend iterative feedback tuning (IFT), which is a data- based approach for controller tuning, with robustness constraints. Hereto a constrained IFT problem is formulated that is solved by introducing a penalty function. Essentially, the gradient estimates decompose into (a) the well-known IFT gradients and (b) the gradients with respect to this penalty function. Experimental results obtained from the motion control systems of an industrial wafer scanner confirm enhanced performance with guaranteed robustness properties.

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