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Sensor optimisation for in-service load measurement of a large composite panel under small displacement

2012 International Conference on Mechanical Materials and Manufacturing engineering, ICMMME 2012

作者： Ramazani, Mohammad Reza Sewell, Philip Noroozi, Siamak Koohgilani, Mehran Cripps, Bob School of Design Engineering and Computing Bournemouth University Poole United Kingdom Longitude Consulting Engineers Ltd Southampton United Kingdom

ISBN: (纸本)9783037855560

Current methods to estimate the behaviour of composite structures are based on trial and error or oversimplification. Normally the nonlinearities in these structures are neglected and in order to cover this inadequacy in design of composite structures, an overestimate safety factor is used. These methods are often conservative and leading to the heavier structures. A novel technique employs Artificial Neural Network (ANN) as an inverse problem approach to estimate the pressure loads experienced by marine structures applied on a composite marine panel from the strain measurements. This can be used in real-time to provide an accurate load history for a marine structure without requiring knowledge of the material properties or component geometry. It is proposed that the ANN methodology, with further research and development, could be utilised for the quantification of in-service, transient loads in real-time acting on the craft from the craft's structural response (strain response to load). However, to fully evaluate this methodology for load monitoring of marine structures further research and development is required such as sensor optimisation. The number of sensors should be minimised to reduce the time to train the system, cost and weight. This study investigates the number of sensors required for accurate load estimation by optimising the method. © (2013) Trans Tech Publications, Switzerland.

关键词： Neural networks

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design of a new solution for the wheeled hopping robot

Design of a new solution for the wheeled hopping robot

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UKACC International Conference on Control (CONTROL)

作者： Jingjing Liu Hongbo Wang Hongnian Yu Lili Zhang Luige Vladareanu Adrian Bruja Gal I. Alexandru Parallel Robot and Mechatronic System Laboratory of Hebei Province Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao China College of Electrical Engineering Yanshan University Qinhuangdao China School of Design Engineering and Computing Bournemouth University Poole UK Robotics and Mechatronic Department Institute of Solid Mechanics Bucharest Romania

In recent years many researchers are trying to combine wheeled movement with legged movement or hopping movement to strengthen the robots adaptability to environment. Hybrid robots are playing a more and more important role in our modern life. However, their controls are mostly complicated. So in this paper we present a new solution for the wheeled hopping robot. Based on the mechanical design, this robot has two movement modes: wheeled and hopping movement mode. While the center of gravity of the mechanism is under the wheels center, the wheeled hopping robot which is like a tumbler can keep its stability even when the wheels' velocity is zero. In this paper, we firstly introduce the description and design of the wheeled hopping robot. Then we explain how to choose the robot parameters and lastly we describe, how the robot through hopping, successfully traverses obstacles and ditches.

关键词： Mobile robots Shafts Wheels Springs Robot kinematics Force

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In-service transient load measurement on a large composite panel

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2012 International Conference on Mechanical Materials and Manufacturing engineering, ICMMME 2012

ISBN: (纸本)9783037855560

Current practices to estimate the pressure loads on the hull of small high-speed craft in a seaway are based on determination of the wave loads by applying rules and standards which itself relies either on often conservative methods, leading to a craft that is heavier and slower than it could be otherwise. There are rather large uncertainties in the wave load predictions for ships mainly caused by not necessarily sufficient theoretical basis of the calculation methods. Direct pressure measurement techniques can only provide data at each transducer location and classical analytical techniques require a large amount of experimental data to be collected to relate pressure to the structures response. The evaluation of wave generated hydrodynamic loads is less reliable as the dynamic nature of the loading as well as transient effects such as slamming and green water on deck still demands more investigations. Therefore, a novel technique is required to overcome these limitations by providing a method of measuring the pressure load with relatively few sensors and minimal data collection. This paper reports on research undertaken to develop an inverse problem approach utilising an Artificial Neural Network (ANN) for quantification of in-service, transient loads in real-time acting on the craft from the craft's structural response (strain response to load). This study investigates suitability and performance of utilising ANN as an inverse problem approach to estimate impact loads applied to up to 13 locations on the structure in real-time from 16 strain measurements. © (2013) Trans Tech Publications, Switzerland.

关键词： Neural networks

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How should we assess the mechanical properties of lower-limb prosthesis technology used in elite sport?—An initial investigation

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Journal of Biomedical Science and engineering 2013年第2期6卷 116-123页

作者： Bryce Dyer Philip Sewell Siamak Noroozi School of Design Engineering & Computing Bournemouth University Poole UK

Despite recent controversy, it is not yet formally recognised how lower-limb prosthesis should be assessed for their performance. To assist in this process, experiments are undertaken to investigate the linearity, stiffness and assessment of feet based energy return prosthesis technology typically used for elite level high speed running. Through initial investigations, it is concluded that static load testing would not be recommended to specify or regulate energy return prostheses for athletes with a lower-limb amputation. Furthermore, an assessment of energy return technology when loaded under dynamic conditions demonstrates changes in mechanical stiffness due to bending and effective blade length variation during motion. Such radical changes of boundary conditions due to loading suggest that any assessment of lower-limb prosthesis technology in the future should use methods that do not assume linear mechanical stiffness. The research into such effects warrants further investigation in the future.

关键词： Prostheses Stiffness Running Amputee Non-linearity

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The stability performances improvement through kinematic and dynamic modeling of the hopping robots

The stability performances improvement through kinematic and...

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UKACC International Conference on Control (CONTROL)

作者： Adrian Bruja Luige Vladareanu Gal Ionel Alexandru Hongbo Wang Hongnian Yu Jingjing Liu Institute of Solid Mechanics of Romanian Academy (IMSAR) Bucharest Romania School of Design Engineering and Computing Boumemouth University Poole Dorset UK Parallel Robot and Mechatronic System Laboratory of Hebei Province Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao China

The paper presents an innovative design for a wheeled hopping robot. Our main objective was to obtain a stable and efficient robot, which can jump over obstacles and has the ability to reach a certain ledge. The innovative design of our robot has the capability to jump to a certain distance even with a zero initial velocity provided by the wheels movement. Also, we took into consideration the wind speed which can prevent our robot to reach the desired destination, and compensated with an initial velocity on the direction of movement. For testing we designed a simulation which had as inputs different initial conditions to test and present the jumping capability of our robot in different jumping conditions. In the end we provide a jump area which the robot can reach for certain initial conditions, so we can later chose the optimal one for reaching the target position.

关键词： Mobile robots Springs Wheels Trajectory Collision avoidance Shafts

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Measuring divergences among mass functions

Measuring divergences among mass functions

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2013 International Conference on Artificial Intelligence, ICAI 2013

作者： Ma, Jianbing School of Design Engineering and Computing Bournemouth University Bournemouth BH12 5BB United Kingdom

ISBN: (纸本)1601322488

Evidence theory is widely used in data mining, machine learning, clustering and database systems. In these applications, often combination of mass functions is performed without checking the degree of relevance between the mass functions, which may lead to counterintuitive results. In this paper, we aim to measure the divergences among mass functions and hence can prevent highly inconsistent mass functions from being combined. Divergence measures are then proposed to this end. In addition, incompleteness measures and similarity measures are also provided based on divergence measures which are useful in practice.

关键词： Functions

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11th German Conference on Chemoinformatics (GCC 2015) Abstracts

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JOURNAL OF CHEMINFORMATICS 2016年第SUPPL 1期8卷 1-27页

作者： [Anonymous] GDCh-CIC Division Associated Board Member Beilstein-Institut zur Förderung der Chemischen Wissenschaften Trakehner Str. 7-9 60487 Frankfurt Germany. ufechner@beilstein-institut.de. Division Medicinal Chemistry Amsterdam Institute for Molecules Medicines and Systems (AIMMS) VU University Amsterdam The Netherlands. Centre for Bioinformatics Uni Hamburg Bundesstr. 43 20146 Hamburg Germany. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. stefan.guessregen@***. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. GlaxoSmithKline Stevenage SG1 2NY UK. nicola.j.richmond@***. Discngine Paris 75011 France. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. marwin.segler@wwu.de. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. Bundeskriminalamt Wiesbaden Central Analytics II 65173 Wiesbaden Germany. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. shea@chem.ucsb.edu. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. Chemistry Department Ludwig-Maximilians-Universität München Butenandtstr. 7 81377 Munich Germany. Inorganic Chemistry and Center for Nanointegration University of Duisburg-Essen Essen Germany. CAM-D Technologies Essen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. achim.zielesny@w-hs.de. Leiden University Leiden Netherlands. j.fraaije@chem.leidenuniv.nl. Culgi BV Berlin Germany. Physikalische Chemie III TU Dortmund 44227 Dortmund Germany. stefan.kast@tu-dortmund.de. Centre for Molecular Informatics Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom. kcb27@cam.ac.uk. Centre for Molecular Informatics Department of Chemistry

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Step semantics and action refinement in event structures

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Computer Modelling and New Technologies 2014年第5期18卷 94-101页

作者： Tang, Weidong Wu, Jinzhao Liu, Meiling School of Information Science and Engineering Guangxi University for Nationalities Nanning China Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu China Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis Nanning China Science Computing and Intelligent Information Processing of GuangXi higher education key laboratory Nanning China

An event structure acts as a denotational semantic model of concurrent systems. Action refinement is an essential operation in the design of concurrent systems. However, there exists an important problem about preserving equivalence under action refinement. If two processes are equivalent with each other, we hope that they still can preserve equivalence after action refinement. In linear time equivalence and branching time equivalence spectrum, step equivalences, which include step trace equivalence and step bisimulation equivalence are not preserved under action refinement [17]. In this paper, we define a class of concurrent processes with specific properties and put forward the concept of clustered action transition, which ensures that step equivalences are able to preserve under action refinement.

关键词： Semantics

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design and implementation of a smart IoT gateway

Design and implementation of a smart IoT gateway

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2013 IEEE International Conference on Green computing and Communications and IEEE Internet of Things and IEEE Cyber, Physical and Social computing, GreenCom-iThings-CPSCom 2013

作者： Guoqiang, Shang Yanming, Chen Chao, Zuo Yanxu, Zhu School of Electronic and Information Engineering Beihang University China Institute of Computing Technology Chinese Academy of Sciences China Department of Information Engineering Beijing Special Engineering Design Institution Beijing China

ISBN: (纸本)9780769550466

With rapid development of Internet of things (IoT), there exists an ever-growing demand for ubiquitous connectivity to integrate multiple heterogeneous networks, such as Zigbee Ad hoc network, wireless LAN, cable network, etc. Some typical applications including environmental monitoring, intelligent transportation, medical care, smart home, industry control, safety defense, etc. require a smart gateway to provide high data-rate, end-to-end connectivity utilizing the higher bandwidth of multi-hop networks among those heterogeneous networks. This paper proposes a novel configurable smart IoT gateway which has three important benefits. Firstly, the gateway has plug gable architecture, whose modules with different communication protocols can be customized and plugged in according to different networks. Secondly, it has unified external interfaces which are fit for flexible software development. Finally, it has flexible protocol to translate different sensor data into a uniform format. Compared with similar research, the gateway has better scalability, flexibility and lower cost. © 2013 IEEE.

关键词： Heterogeneous networks

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Environmental impact of Converted Electrical Motorcycle

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World Electric Vehicle Journal 2013年第4期6卷 1136-1143页

作者： Xuan, Pek Yang Henz, Martin Weigl, Joerg Dieter Department of Civil and Environmental Engineering National University of Singapore Block E1A #07-03 No.1 Engineering Drive 2 117576 Singapore University Scholars Programme/School of Computing National University of Singapore Singapore Engineering Design and Innovation Centre National University of Singapore Singapore

This study explores the environmental impact of the conversion of an internal combustion engine (ICE) sports motorcycle into a converted battery-powered electric vehicle (CBEV). Zero tailpipe emissions might lead to the assumption that such an ICE-to-BEV conversion will always yield net positive environmental benefits in life cycle greenhouse gas (GHG) emissions and energy reductions, but energy inputs and materials impacts associated with the conversion of a CBEV are weighed against savings during postconversion usage. It was found that conversion would reduce the life cycle energy consumed and emissions produced of a typical motorcycle by 72% and 45% respectively. These findings have important considerations for the current global transportation landscape. © 2013 WEVA Page.

关键词： Life cycle

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