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IEEE/ASME International conference on Advanced Intelligent Mechatronics (AIM 01)

作者： Callegari, M Cannella, F Monti, S Santolini, C Pagnanelli, P Univ Ancona Dipartimento Meccan I-60131 Ancona Italy

ISBN: (纸本)0780367367

High-speed robotics is growing fast as a new research and application field, with more and more demanding requirements actually posed to robots' builders;sometimes the design of brand new mechanical architectures is needed (eg. lightweight parallel machines) but, if possible, reengineering of existing models will provide more economical solutions. This is presently the case of the CO2 High Speed Cartesian robot produced by Campetella Robotic Center, that is already characterised by good dynamic performances but has been chosen by the producer for a re-engineering that should allow it to meet even more advanced targets. First experimental tests showed that some important interventions were needed for the upgrade, therefore a full dynamic modelling has been performed by the University of Ancona to try to get the best of the existing hardware during the reengineering phase. The simple mechanical architecture of the Cartesian robot allowed to outline a typical modelling approach that took profit of the full integration of the used software packages;a campaign of experimental measures has been performed for the validation of the mathematical models and to assess the dynamic behaviour of the mechanical structure through modal testing.

关键词： high speed robotics dynamic modelling and simulation robot design

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Maintenance modelling in the case of in-development systems:: Application of OODBN to turbofan engines

Maintenance modelling in the case of in-development systems:...

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European Safety and Reliability conference (ESREL 2007)

作者： Guyot, B. Cayre, E. Berenguer, C. Snecma Moissy Cramayel France Univ Technol Troyes Troyes France

ISBN: (纸本)9780415447867

This document aims to present a method of maintenance modelling in the case of in-development complex systems. This one leads to compute maintenance indicators, such as maintenance costs and operations frequencies. It provides criteria during technological decision-making process, under constraints of limiting uncertainties. Based on the application of Bayesian Networks, this method can be divided into three different tasks. Firstly, a standard degradation model, based on comparable systems behaviours, is built up by using the Object Oriented Dynamical Bayesian Networks theory. Then, this network is fitted to the behaviour of a specific system. Lastly, this mathematical tool is updated by adding new variables in order to compute maintenance modelling.

关键词： Turbofan engines

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modelling of flow behaviour of magnesium alloys 16th

Modelling of flow behaviour of magnesium alloys

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16th Metal Forming International conference, 2016

作者： Bruni, Carlo Department of Industrial Engineering and Mathematical Sciences Università Politecnica Delle Marche Via Brecce Bianche Ancona Italy

ISBN: (纸本)9783038357049

The present paper aims at studying the flow behaviour of magnesium alloys under different conditions in terms of temperature, deformation velocities and deformation. The modelling approach was based on a proposed equation to model the shape of each flow curve through different variables. The modeled flow curves were subsequently compared with those obtained with experiments. The models were validated on flow curves not used in the building stage. It was observed that, for the high temperature, the flow softening has to be limited in order to allow the extrapolation queue required for elevated deformations. Also for low temperature values, high deformation velocities and deformations the final part of the flow curve has to be adapted in order to be utilized for the description of material in the numerical simulation. In other words they need to be extrapolated. The deformation value at which the extrapolation starts can be predicted with an other proposed equation detailed in the paper. © 2016 Trans Tech Publications, Switzerland.

关键词： Deformation

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Probabilistic modelling of human adaptive behaviour in non-airconditioned buildings

Probabilistic modelling of human adaptive behaviour in non-a...

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conference on Adapting to Change: New Thinking on Comfort, WINDSOR 2010

作者： Wei, Shen Buswell, Richard Loveday, Dennis Department of Civil and Building Engineering Loughborough University United Kingdom

In non-air-conditioned buildings, occupants are able to interact with their surrounding environment using various adaptive opportunities such as opening a window. The availability of these opportunities may make occupants feel thermally comfortable across a wider range of conditions than in air-conditioned buildings. Therefore, a good understanding of human adaptive behaviour is required to generate a realistic simulation of the thermal performance for non-air-conditioned buildings. From a field survey carried out in four non-air-conditioned buildings in the summer of 2009, in Loughborough University, UK, it was found that occupants have different preferences when using adaptive opportunities to adjust their surrounding thermal environment. This paper presents a new approach that attempts to model human adaptive behaviour captured from occupant survey data. In addition, an adaptive preference model, which is a key part of the approach, is introduced in this paper.

关键词： Surveys

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Digitalization of Training Tasks and Specification of the behaviour of a Social humanoid Robot as Coach 8th

Digitalization of Training Tasks and Specification of the Be...

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8th International conference on human-Centered Software engineering (HCSE)

作者： Forbrig, Peter Bundea, Alexandru Pedersen, Ann Platz, Thomas Univ Rostock Dept Comp Sci Albert Einstein Str 22 D-18055 Rostock Germany Univ Greifswald Inst Neurorehabil & Evidenzbasierung BDH Klin Greifswald Karl Liebknecht Ring 26a D-17491 Greifswald Germany Univ Med Greifswald Neurorehabil Res Grp Fleischmannstr 44 D-17491 Greifswald Germany

ISBN: (纸本)9783030642655;9783030642662

The number of physiotherapists and occupational therapists is not sufficient to cope with the demands of the increasing number of stroke survivors worldwide. These patients need specific training to promote recovery and prevent stroke-related disability. The paper discusses aspects how a social humanoid robots might serve as therapeutic assistant. It is not intended to replace human therapists, but to provide them with therapeutic assistance once therapeutic decisions are taken and the therapy has been introduced to the patient by the human therapists and the day to day practice needs to be supervised. The paper provides a case study of an HCD approach and exemplifies the strategy of digitalizing training tasks, the identification of exceptions, and ways of modelling the dynamic behaviour of the humanoid robot. This is demonstrated by task models. Some extensions of task models are suggested.

关键词： Social humanoid robot human factors Interaction design Robot assistance Arm rehabilitation for stroke patients Task models

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Triply articulated modelling in complex systems

Triply articulated modelling in complex systems

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9th World Multi-conference on Systemics, Cybernetics and Informatics

作者： Cohen, Bernard Boxer, Philip City Univ London Sch Informat London EC1V 0HB England

ISBN: (纸本)9789806560598

We argue that traditional systems engineering (TSE) is inadequate for engineering complex systems. This inadequacy becomes particularly problematic when the system in question is a System of Systems (SoS) whose behaviour depends on how human users of the component systems, anticipating the consequences of their own behaviour, interact with those systems and with each other. Considering its users to be part of the SoS renders such a system anticipative, and therefore necessarily complex. To be effective, the designer of an SoS must incorporate an understanding of its users' models of their contexts of use. However, the process of design then becomes reflexive, since it must include within itself models of its users' anticipations of its relation to the SoS's environment, including those of its designers. As a result, complex systems engineering (CSE) has to become a distinct discipline, involving explicit processes that occur at the time of use of an SoS, not only for negotiating shared meaning between component systems within peer-to-peer relationships, but also for considering the dynamic effects of differing uses of component systems on the behaviour of the SoS as a whole. By modeling users' relations to demand as well as to the behaviour and organisation of component systems, triply articulated modeling supports the negotiation of shared meaning and accommodates the reflexivity required of a CSE regimen.

关键词： systems-of-systems asymmetric demand enterprise modeling triple articulation power-to-the-edge anticipative systems third-order systems complex systems engineering granularity stratification simplicial complex value ladders

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Use of headgear in football - A computer simulation of the human head and neck

Use of headgear in football - A computer simulation of the h...

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8th conference of the International-Sports-engineering-Association (ISEA)

作者： Lehner, Stefan Wallrapp, Oskar Senner, Veit Tech Univ Munich Dept Sport Equipment & Mat Boltzmannstr 15 D-85747 Garching Germany Univ Appl Sci Dept Precis & Micro Engn D-80335 Munich Germany

Although head injuries in football having approximately the same incidence as in American football and ice hockey, head protectors are barely used for prophylaxis. A detailed human head-neck model including force elements describing the material behaviour of human soft tissue structures such as ligaments, tendons, cartilage layers, intervertebral discs and muscles has been developed using multi-body system (MBS) modelling techniques to investigate the effectiveness of commercial headgear. For ball-head impacts at ball velocity of about v = 20 m/s the simulations calculate a Head Impact Power (HIP) index of 4.1 kW resulting in a five percent injury risk for concussion. When using headgear the resulting HIP-value comes to 3.91 kW meaning that the reduction of the injury risk is very small. (C) 2010 Published by Elsevier Ltd.

关键词： cervical spine football computer simulation headgear ball impact

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SERVICE DESIGN FOR PEOPLE WITH DISABILITIES USING CONTEXT-BASED ACTIVITY modelling AND INTERNATIONAL CLASSIFICATION OF FUNCTIONING, DISABILITY AND HEALTH 21

SERVICE DESIGN FOR PEOPLE WITH DISABILITIES USING CONTEXT-BA...

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21st International conference on engineering Design (ICED)

作者： Lim, Myung Joon Kim, Yong Se Sungkyunkwan Univ Seoul South Korea Natl Rehabil Ctr Seoul South Korea

ISBN: (纸本)9781904670919

The core of the service is personalization, and personalized should be preceded by an understanding the individual, and the context surrounding the individual. People with disabilities want to use products, and have more services that are just right for him/her. However, since the developer of the product or service is often not the disabled, it is difficult to give insight into the problems of individuals with disabilities. Also, there is a lack of processes and framework in the development of products and services for the disability. Therefore, this paper will propose a framework for service design for people with disability according to Context-Based Activity modelling (CBAM), Product Service System (PSS) methodology, and International Classification of Functioning, Disability, and Health (ICF) framework. Then the specific process of the kneeling bus for people with disability is explained using the proposed service design framework for people with disability. We hope that this framework for service design for people with disability will become available through much research.

关键词： Service design People with disability Inclusive design human behaviour in design ICF

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mathematical modelling of particle formation in combustion processes

Mathematical modelling of particle formation in combustion p...

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8th Biennial ASME conference on engineering Systems Design and Analysis

作者： Zucca, Alessandro Marchisio, Daniele L. Barresi, Antonello A. Baldi, Giancarlo Politecn Torino Dip Sci Mat & Ingn Chim I-10129 Turin Italy

ISBN: (纸本)9780791842515

In recent years the problem of studying particle formation and evolution in turbulent flames has become increasingly important, for both environmental and technological reasons. Information on particle size and morphology is often required, since these characteristics largely influence the effects of particulate matter on human health and global climate in the case of soot. A mathematical model able to describe the evolution of these particulate systems must solve the population balance equation within a Computational Fluid Dynamics (CFD) code that predicts the temperature, composition and velocity fields of the flame. In this work, the recently proposed Direct Quadrature Method of Moments (DQMOM) is applied to the study of soot formation in turbulent non-premixed flames. The model takes into account nucleation, molecular growth, oxidation and aggregation of soot particles;simplified kinetic rates are employed, while velocity and scalar fields are computed by simulations based on the solution of the Reynolds Averaged Navier Stokes (RANS) equations. Different population balance formulations are implemented and compared and results show that DQMOM is a suitable modelling tool;comparison of predictions with experimental data shows that the model accurately describes the morphological properties of soot aggregates.

关键词： Combustion

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Phenomena-based modularisation of chemical process models to approach intensive options

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CHEMICAL engineering JOURNAL 2008年第1-2期135卷 83-94页

作者： Arizmendi-Sanchez, J. A. Sharratt, P. N. Univ Manchester Sch Chem Engn & Analyt Sci Manchester M60 1QD Lancs England

The fundamental thinking underpinning process intensification (PI) involves an understanding of process phenomena at various levels and their interrelationships without the spatial constrains of conventional unit operation models. This paper presents a framework in which the process models are based on the physicochemical phenomena arranged into abstract (i.e. equipment-independent) functional, structural and behavioural modules. This modularisation framework is used in a methodology to encourage the generation of intensive design strategies. Topological representations are first generated from qualitative knowledge and then mapped into mathematical models. Causal graphs are introduced to allow the designer to identify the relationships between variables relevant to the process. The models are implemented in object-oriented software to quantify the net effect of selected design variables or to quantify equipment requirements. This approach is proposed to increase the flexibility, customisation and reusability of models in order to encourage the implementation and assessment of novel intensified and multifunctional process options. (c) 2007 Elsevier B.V. All rights reserved.

关键词： structure behaviour phenomena-based modelling object-oriented modularisation process intensification

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