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Basic studies of evaluation method of lubricants for powder metallurgy-second report

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2015年第3期62卷 101-107页

作者： Adachi, Kyoushi Fujiki, Akira R and D Laboratory of ADEKA CHEMICAL SUPPLY CORPORATION 7-2-34 Higashiogu Arakawa-ku Tokyo116-0012 Japan Department of Mechanical Control Systems Faculty of System Science and Engineering Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama337-8570 Japan

This study measured the coefficients of friction on several lubricants for powder metallurgy with horizontally both- way sliding friction tester. We obtained the results that static coefficients of friction on those powder lubricants were from 0.21 to 0.45, and those kinetic coefficients of friction were from 0.13 to 0.25. Furthermore, the relationship between coefficients of friction and ejection pressures on several powder lubricants showed that low kinetic coefficient of friction tended to below-ejection pressure, on mixed-type lubricants. The relationship between coefficients of friction and green density on them showed that low-static and kinetic coefficients of friction tended to be high-green density.

关键词： Powder metallurgy

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Development of a milling machining cutting simulation service in a Cloud-based system

Development of a milling machining cutting simulation servic...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Yung-Chou Kao Yu-Chuan Lin Haw-Ching Yang Department of Mechanical Engineering National Chung Cheng University Chiayi Taiwan R.O.C. Institute of Manufacturing Information and Systems National Cheng Kung University Tainan Taiwan R.O.C. Institute of System Information and Control National Kaohsiung First University of Science and Technology Kaohsiung Taiwan R.O.C.

ISBN: (纸本)9781509024100

This paper describes the development of a Cloud-based solid cutting simulation service system for 3D toolpath verification before it is to be uploaded to a CNC machine tool for machining operation. A user can access the system through common WWW browsers such as Internet Explorer and/or Google Chrome in either a PC running Microsoft Windows, a smart phone running Android, or an iPad running iOS. The system can perform real time solid cutting simulation based on the toolpath (NC program). The system provides user with standard views such as “ISO View”, “Front View”, “Right View”, and “Top View”; dynamic customized 3D view could be controlled through the mouse operation on the client side to ease the visibility during the simulation. The proposed system has been successfully implemented on a public cloud system Microsoft Azure with expected performance and is expected to assist a user in verifying the correctness of the toolpath and to enhance the efficiency in a geographically dispersed networked environment.

关键词： Solid modeling Three-dimensional displays Servers Browsers Solids Cascading style sheets Cloud computing

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Robust fault tolerant manoeuvring and rudder control of marine vehicles with state saturation

Robust fault tolerant manoeuvring and rudder control of mari...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Xiaozheng Jin Qiuhong Liu Yu Kang Jiahu Qin School of Electrical Engineering and Automation HeFei University of Technology HeFei AnHui China Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin China Department of Automation University of Science and Technology of China Hefei China Key Laboratory of Technology in Geo-Spatial Information Processing and Application System Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781467380768

In this paper, the problem of rudder-roll damping control for a class of cruise keeping ships subject to both actuator fault and state saturation is investigated. A manoeuvring and rudder control model of marine vessels is firstly reviewed based on the existing literature. Actuator faults which including partial loss of rudder effectiveness and actuator-bias faults are considered in the model. Then a switching control strategy is developed to compensate for the actuator faults and to guarantee the stability of the rudder-roll damping control system. Moreover, some relationship regarding state saturation bounds, actuator fault limits and control parameters are analyzed in this paper. Finally, simulation results are given to illustrate the proposed procedures and their effectiveness.

关键词： Actuators Vehicles Damping Mathematical model Marine vehicles Vehicle dynamics

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Model Based Fallback control for Networked control system via Switched Lyapunov Function

Model Based Fallback Control for Networked Control System vi...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Tsubasa Sasaki Kenji Sawada Seiichi Shin Shu Hosokawa Department of Mechanical Engineering and Intelligent Systems The University of Electro-Communications Control System Security Center

ISBN: (纸本)9781479917631

This paper aims to propose a fallback system isolated from man-in-the-middle attack (MITM) for networked control systems. In this paper, fallback is an incident response of the control system in which facilities are preferentially protected and a minimal system operates during MITM. Since the communication contents of the networked control systems can be tampered with by MITM, the proposed system named a "fallback system" is installed in a control target side, and the fallback system detects MITM without the communication contents. This system detects MITM based on the bilinear observer and switched Lyapunov function. When MITM is detected, normal operation is switched to fallback operation automatically. As a first step of this study, a selector and a fallback unit of the fallback system are developed. A practical experiment simulating a simple defective discriminator is shown.

关键词： Networked control system Cyber-attack Lyapunov function Fallback Model-based control

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Communication Scheduling in Robust Self-Triggered MPC for Linear Discrete-Time systems ∗

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IFAC-PapersOnLine 2015年第22期48卷 132-137页

作者： Florian D. Brunner T.M.P. Gommans W.P.M.H. Heemels Frank Allgöwer Institute for Systems Theory and Automatic Control University of Stuttgart Pfaffenwaldring 9 70569 Stuttgart Germany Control System Technology Group Department of Mechanical Engineering Eindhoven University of Technology The Netherlands

We consider a networked control system consisting of a physical plant, an actuator, a sensor, and a controller that is connected to the actuator and sensor via a communication network. The plant is described by a linear discrete-time system subject to additive disturbances. In order to reduce the required number of communications in the system, we propose a robust self-triggered model predictive controller based on rollout techniques that robustly asymptotically stabilizes a certain periodic sequence of sets in the state space while guaranteeing robust satisfaction of hard state and input constraints. At periodically occurring scheduling times, the self-triggered model predictive control algorithm determines the times at which the control input and plant measurement are updated in the time span until the next scheduling time. We establish a certain upper bound on the average sampling rate in the closed-loop system. Moreover, we show how increasing the asymptotic bound on the system state, which is a design parameter in the control scheme, can be used to further reduce the average number of communications in the system.

关键词： predictive control self-triggered control robustness

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Global Iterative Closet Point Using Nested Annealing for Initialization

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Procedia Computer Science 2015年 60卷 381-390页

作者： Tao Ngoc Linh Hasegawa Hiroshi Deparment of Functional Control Systems Graduate School of Engineering and Science Shibaura Institute of Technology Saitama 337-8570 Japan. Department of Machinery and Control System College of Systems Engineering and Science Shibaura Institute of Technology Saitama 337-8570 Japan.

In computer vision, Iterative Closest Point (ICP) has been a key tool for registration algorithms, a fundamental task in computer vision. However, ICP based registration algorithms always face with local minima problem and pre-aligned pointsets are the must to guarantee correct convergence. Pre-alignment used to be carried out by our human in some mesh processing softwares. This paper provides a solution for initialization problem for registering two 3D surfaces under L 2 error using ICP algorithm. Our algorithm uses a combination between Nested Annealing (NA) and ICP in which NA is used as global optimization search engine to find the global minima with a novel approach of using point based boundary searching. The algorithm uses ICP to derive local minima as well as local minima error. The integration between ICP and NA is successfully implemented and coded into a program which inputs two range image and outputs the transformation matrix between them at high accuracy and success rate.

关键词： 3D registration ICP Nested Annealing Global registration Hybrid algorithm.

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Resource-aware set-valued estimation for discrete-time linear systems

Resource-aware set-valued estimation for discrete-time linea...

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IEEE Annual Conference on Decision and control

作者： F. D. Brunner T. M. P. Gommans W. P. M. H. Heemels F. Allgowert Institute for Systems Theory and Automatic Control (IST) University of Stuttgart 70550 Stuttgart Germany Control System Technology group Department of Mechanical Engineering Eindhoven University of Technology

ISBN: (纸本)9781479978878

In this paper, we propose a self-triggered estimator for discrete-time linear systems subject to unknown but bounded disturbances affecting both the system states and outputs. The proposed self-triggered estimator is a set-valued estimator that employs rollout techniques to reduce the communication between the sensors and the estimator with respect to a periodic sampling strategy. Moreover, at each time instant it provides an estimate of the plant state and a guaranteed bound on the difference between the true plant state and the estimate.

关键词： Linear system discrete-time discrete time systems Unknown Sensors Communication Research

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Production Planning and Opportunistic Preventive Maintenance for Unreliable One-Machine Two-Products Manufacturing systems

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IFAC-PapersOnLine 2015年第3期48卷 478-483页

作者： Assid, M. Gharbi, A. Hajji, A. Automated Production Engineering Department École de Technologie Supérieure Production System Design and Control Laboratory University of Québec 1100 Notre Dame Street West Montreal QC H3C 1K3 Canada Department of Operations and Decision Systems CIRRELT Pavillon Palasis-Prince 2325 rue de la Terrasse Quebec QC G1V 0A6 Canada

This paper develops an effective joint production, setup and maintenance control policies in an unreliable one-machine two-products manufacturing system. The main objective is to reach a higher synchronization level of the preventive maintenance (PM) interventions in the planning of production activities. The proposed joint control policy integrates the concept of the opportunistic maintenance by taking advantage of the machine stoppage during setup operations in order to conduct preventive actions. This aims to increase the machine availability and to reduce the risk of shortages. Performance evaluation of the proposed control policy is carried out using a combined continuous/discrete event simulation model. It is subsequently analyzed by statistical techniques of optimization such as design of experiments, analysis of variance and response surface methodology. An illustrative numerical example followed by an in-depth comparison study for a wide range of the system configurations are performed in order to demonstrate the usefulness and the robustness of the results. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Production control

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Bus Priority system Using Radio Frequency Identification (RFID) Detection in Singapore

Bus Priority System Using Radio Frequency Identification (RF...

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2015年南京第十四届亚太智能交通论坛

作者： Tatsuya Higuchi Lincoln Tan Musthafa Ibrahim Joanne Cheong Traffic Control Systems Engineering Section Electronic Control Technology Department ICT Solution He Traffic Control & Transportation Division Mitsubishi Heavy Industries Engine System Asia Pie LtdSin Intelligent Transport Systems Development Land Transport AuthoritySingapore City219428Singapore

Making public transport a choice mode is one of the three key strategic thrusts listed in Land Transport Master Plan (LTMP) *** achieve that, it is important to make the public transport system attractive for use by the *** of such application identified is to provide signal priority for busses at traffic light *** scan and assessment of various detection technologies have indicated that RFID is the appropriate, open standards and economical technology for the bus *** is a wireless non-contact system that uses radio-frequency electromagnetic fields to transfer data from a tag attached to an object, for the purposes of automatic identification and *** tags has been widely used in various industries, including transportation for payment services such as for transit fares, highway tolls and parking fares, as well as in the areas of vehicle identification and access control in many *** the cost of RFID tags has decreased significantly over time, its detection capability has also improved to allow longer range *** this, a concerted initiative between the local authorities and the industry to conduct a technical trial for traffic light priority for buses using radio frequency identification technology (RFID) was executed at selected test locations in *** paper discusses on the technical trial conducted to assess the accuracy and reliability of Bus Priority system using RFID in providing traffic light priority for buses in Singapore.

关键词： ITS signal priority technical trial radio frequency identification

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