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Student conference on Research and Development (SCOReD)

作者： Lim Wei Hong K. M. Begam Vimal Rau Aparow Shibajee Nath Teo Jin Ming Kamyar Mehranzamir Department of Electrical and Electronic Engineering Intelligent Electric Vehicle System (i-EVeS) Research Group University of Nottingham Malaysia Semenyih Malaysia Department of Electrical and Electronic Engineering University of Nottingham Malaysia Semenyih Malaysia

ISBN: (数字)9798350318821

ISBN: (纸本)9798350318838

Wireless power transfer (WPT) eliminates the need for wires to transfer power, making it more convenient, reduces risk of hazard caused by cables and allows self-driving battery powered vehicles to charge without human operation. However, the wireless power transfer efficiency decreases dramatically as misalignment between the transmitter (Tx) coil and receiver (Rx) coil increases. In this paper, LCC-LCC compensation network is integrated into the design of the WPT system to improve both misalignment and output load tolerance of the WPT system. Kirchhoff’s Voltage Law (KVL) was done, and the equations produced were used to calculate the values of the components and a MATLAB Simulink simulation model was constructed. The simulation results will be compared with theoretical calculations to verify the mathematical equations. The design of a 30V, 2.5A, 75W LCC-LCC compensation network resonant converter operating at 85kHz achieved an efficiency of 81%.

关键词： Coils Transmitters Software packages Simulation Wires Wireless power transfer Resonant converters

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Identification of Nonlinear Joint Interface Parameters Using Instantaneous Power Flow Balance Approach 15th

Identification of Nonlinear Joint Interface Parameters Using...

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15th International conference on Dynamical Systems: Theory and Applications, DSTA 2019

作者： Anish, R. Shankar, K. Machine Design Section Department of Mechanical Engineering Indian Institute of Technology Madras Chennai India

ISBN: (纸本)9783030773090

Joints in assembled structures can affect the dynamic behaviour of mechanical structures under dynamic loading conditions. mathematical modelling of such structures, one need to consider the joint interface effects accurately. In this paper a bolted lap joint is modelled with a nonlinear spring and a damper to simulate the nonlinear effects like softening phenomena due to slip, associated with the joint structures. The known parametric model of the assembled beam structure with joint interface non-linearity was simulated ‘experimentally’ under a harmonic external excitation to find the responses. The parameter identification was formulated as an inverse problem using Particle Swarm Optimization algorithm. The error between experimentally measured and numerically predicted response matching and a novel Instantaneous Power Flow Balance criterion based objective functions are used for the identification of nonlinear parameters. The identified nonlinear parameters show the accuracy of the current method over other time domain methods. © 2021, Springer Nature Switzerland AG.

关键词： Inverse problems

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modelling Pedestrian Crossing behaviour based on human Factor

Modelling Pedestrian Crossing Behaviour based on Human Facto...

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8th International conference on Transportation and Traffic engineering (ICTTE)

作者： Nasrudin, Naasah Marzukhi, Marlyana Azyyati Leh, Oliver Ling Hoon Yusoff, Zaharah Mohd Khalid, Nurul Shakila Univ Teknol MARA Ctr Town & Reg Planning Studies Shah Alam Malaysia Univ Teknol MARA Ctr Surveying Sci & Geomat Shah Alam Malaysia

Research on pedestrian crossing behaviour in urban areas is extensive and has contributed to very useful insights into the role of road, traffic and pedestrian characteristics on the crossing decisions of pedestrians, their compliance with traffic rules and the related safety. However, human factors are rarely incorporated in pedestrian crossing behaviour research. The objective of this research is to analyse the development of pedestrian crossing choice models on the basis of road traffic and human factors. For that purpose, a questionnaire was distributed to 663 respondents among pedestrians in the Shah Alam district. The respondents were asked to fill in a questionnaire about their travel motivations, ability characteristics, risk perceptions and preferences with respect to walking and road crossing, as well as their opinion on drivers, etc. From the modelling analysis, the results showed that there is a significant relationship between human Factor and Crossing behaviour;there were two components of human Factor that influenced pedestrian crossing behaviour to emerge, namely a "risk-taker" and a "rule-follower". Based on 'path coefficient' of human Factor analysis, this study concludes that a 'risk-taker' component contributed more to Crossing behaviour. The findings of this research can be used to evaluate the implementation of new pedestrian crossings and a redesign of existing pedestrian crossing environments.

关键词： human engineering

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Emotion Recognition using Electroencephalography in Response to High Dynamic Range Videos

Emotion Recognition using Electroencephalography in Response...

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2021 International conference on Information Technology, ICIT 2021

作者： Riaz, Majid Majid, Muhammad Mir, Junaid University of Engineering and Technology Department of Computer Engineering Taxila Pakistan

ISBN: (纸本)9781665428705

Emotions are the human's internal feelings that result in physiological and physical changes influencing behaviour and thought. Emotion recognition is critical in affective computing for user modelling and human-computer interaction. Previously, user's emotional states have been recognized by measuring physiological activities in response to various audiovisual standard dynamic range (SDR) emotional stimuli. High dynamic range (HDR) content provides a better visual and immersive experience than SDR stimuli due to more brightness, enhanced contrast, and saturated colors. However, the impact of HDR multimedia on emotion elicitation and recognition has not been studied yet. In this paper, four audio-visual HDR stimuli were selected that evoke discrete emotions in each quadrant of the arousal-valence plane. Electroencephalography (EEG) signals of 27 subjects were recorded while watching HDR stimuli using a commercially available Emotiv Insight headset. Time-domain features from 5 channels of EEG signals are extracted and selected to classify emotions in two arousal and valence states using a support vector machine (SVM) classifier. Classification accuracies of 80.55% and 70.37% are achieved for arousal and valence, respectively. Our findings show that HDR videos can act as powerful stimuli for emotion recognition. © 2021 IEEE.

关键词： Emotion Recognition

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59th Symposium on engineering modelling in Mechanics, 2020

59th Symposium on Engineering Modelling in Mechanics, 2020

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59th Symposium on engineering modelling in Mechanics, 2020

ISBN: (纸本)9783030684549

The proceedings contain 25 papers. The special focus in this conference is on engineering modelling in Mechanics. The topics include: Optimization of the Drilling Process in Multi-hole Objects;comparative Tests of Static Properties of Steel and Polymer Concrete Machine Tool Body Elements;the Use of Beta Statistical Distribution in Speed Modeling Of Military High Mobility Wheeled Vehicle In Proving Ground Tests;identification of the mathematical Model of the Bucket Conveyor;selected Problems of the Numerical Capacity Assessment for Floating Systems;investigation of Helicopter Impact on Structural Vibrations of Elevated Helipads;the Use of Alginate Mass to Obtain Limb Geometry for the Sake of human and Animal Limb Prosthesis;intelligent Drive in Industry 4.0 – Protection of Toothed Belt Transmission on the Basis of Its Digital Twin;assessment Method of Machinery Technical Safety in the Aspect of Virtual Commissioning of Machines;the Effects of the Aeration Phenomenon on the Performance of Hydraulic Shock Absorbers;testing the Motion Resistance of Angular Contact Spindle Bearings for Different Ways of Preload Implementation;example of Using Smoothed Particle Hydrodynamic Method in the Design of Angler Fishing Float;analysis of the Impact of Dynamic Loads on Transmission Shafts of a Civil Aircraft;numerical Analysis of Fragmentation and Bullet Resistance of Various Steel Thicknesses and Composite Plates;structural Analysis of 6R Robotic Arm. Comparison of Different Complexity Models;finite Element Analysis of Stress Distribution in the Node Region of Isogrid Thin-Walled Panels;Development of Unmanned Cargo VTOL Aircraft;analysis of Off-Grid Hybrid Solar – Wind Power Plant.

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Exploring Theory of Mind for human-Robot Collaboration

Exploring Theory of Mind for Human-Robot Collaboration

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IEEE International Workshop on Robot and human Communication (ROMAN)

作者： Marta Romeo Peter E. McKenna David A. Robb Gnanathusharan Rajendran Birthe Nesset Angelo Cangelosi Helen Hastie Department of Computer Science University of Manchester UK School of Mathematical and Computer Sciences Heriot-Watt University UK

ISBN: (数字)9781728188591

ISBN: (纸本)9781665406802

The ability to impute mental states to oneself or others, or Theory of Mind (ToM), has been intrinsically linked to trust between humans. However, less is known about how a robot mimicking ToM affects users’ trust and behaviour. We explore this through an online study, where we compare three robot personas in a cooperative maze navigation task: one neutral, one that explains its reasoning in technical terms, and one that mimics ToM. We show that ToM influences human decision-making behaviour and trust in a way that makes it more appropriate with respect to the competencies of the robot. This is key for human-robot collaboration and adoption of robotics moving forward.

关键词： Navigation Decision making MIMICs Social robots Collaboration Maintenance engineering Robot sensing systems

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A research agenda for the study of social norm change

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PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-mathematical PHYSICAL AND engineering SCIENCES 2022年第2227期380卷 20200411-20200411页

作者： Andrighetto, Giulia Vriens, Eva Natl Res Council Italy Inst Cognit Sci & Technol Via Palestro 32 I-00185 Rome Italy Malardalens Univ Sch Educ Culture & Commun Div Math & Phys 883 S-72123 Vasteras Sweden Inst Future Studies Hollandargatan 13 S-11136 Stockholm Sweden

Social norms have been investigated across many disciplines for many years, but until recently, studies mainly provided indirect, implicit and correlational support for the role of social norms in driving behaviour. To understand how social norms, and in particular social norm change, can generate a large-scale behavioural change to deal with some of the most pressing challenges of our current societies, such as climate change and vaccine hesitancy, we discuss and review several recent advances in social norm research that enable a more precise underpinning of the role of social norms: how to identify their existence, how to establish their causal effect on behaviour and when norm change may pass tipping points. We advocate future research on social norms to study norm change through a mechanism-based approach that integrates experimental and computational methods in theory-driven, empirically calibrated agent-based models. As such, social norm research may move beyond unequivocal praising of social norms as the missing link between self-interested behaviour and observed cooperation or as the explanation for (the lack of) social tipping. It provides the toolkit to understand explicitly where, when and how social norms can be a solution to solve large-scale problems, but also to recognize their *** article is part of the theme issue 'Emergent phenomena in complex physical and socio-technical systems: from cells to societies'.

关键词： social norms norm change tipping points experiments agent-based modelling computational social science

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Numerical comparative analysis of a thin-shell spatial structure for the candela’s cosmic rays pavilion 2nd

Numerical comparative analysis of a thin-shell spatial struc...

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2nd IAA/AAS conference on Space Flight Mechanics and Space Structures and Materials, SciTech Forum 2019

作者： Aleshina, Olga Cajamarca, David Barbecho, Juan Department of Civil Engineering RUDN University 6 Miklukho-Maklaya Str Moscow117198 Russia Academic Unit of Engineering Industry and Construction Catholic University of Cuenca Americas y Humboldt Cuenca010101 Ecuador

ISBN: (纸本)9780877036746

This paper presents the structural behaviour comparative analysis between a new thin-shell spatial structure and the hyperbolic paraboloid shaped Cosmic Rays Pavilion designed by Felix Candela in 1951. The design of lightweight, reliable and durable structures is a task of particular interest and thin-shell structures can solve this problem. The mathematical complexity of spatial shell-structures contrasts with its aesthetical, lightness and strength with a tiny thickness. The Candela’s Cosmic Rays Pavilion is a reinforced concrete structure, and its key requirement was that the thickness not to exceed 15 mm in the highest point to admit cosmic rays. The strategy applied in the present work utilises the FEM and Numerical Models to study the stress-strain state of 2 different configurations of a developable torse surface of equal slope with a directrix ellipse at the base and compare these results with the behaviour of the originally built hyperbolic paraboloid. The results of the research show a good structural behaviour of the new form of Torse-Shell with a very small thickness, moreover, keeping the original general dimensions (LxBxH=12x11x5 m) the proposed structures provide more useful internal space and a larger external surface. In this way the proposed 2-torses shape provides 15.7% more internal volume than the hyperbolic paraboloid shape with an increase of only 4.6% in mass, while for the 4-torses shape provides 16,8% more internal volume with an increase of 8.6% in mass. The authors of this work will continue the research taking in account other structural parameters such as materials, dynamic influences, Three-dimensional finite elements for the modelling of the interface between beams and thin-shells and with the application of other shapes of analytical surfaces. © 2021, Univelt Inc. All rights reserved.

关键词： Cosmic rays

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Investigation of High Voltage Circuit Breaker by mathematical modelling of Arc behaviour

Investigation of High Voltage Circuit Breaker by Mathematica...

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2020 IEEE International Power and Renewable Energy conference, IPRECON 2020

作者： Patel, Kurven Rabara, N.D. LD College of Engineering Department of Electrical Engineering Ahmedabad India

ISBN: (纸本)9781728161860

Circuit breaker is an essential component for power system protection. mathematical models of arc help analyze arc behaviour by which interruption process of circuit breaker can be understood. This paper aims at investigating the current interruption process in circuit breaker by considering Mayr and Schwarz arc models. Effect on arc voltage and post arc current with the variation of cooling power and time constant parameters in Mayr arc model is described in this paper. Method to derive parameters of Schwarz arc model is presented in this paper. Comparison of Mayr arc model and Schwarz arc model is shown. © 2020 IEEE.

关键词： Electric circuit breakers

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Frame detachment simulation of PV modules under mechanical load

Frame detachment simulation of PV modules under mechanical l...

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Thermal, Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-Systems EuroSimE

作者： Daniel Christopher Joseph Anna Saperas López Pascal Romer Andreas J. Beinert Fraunhofer Institute for Solar Energy Systems ISE Freiburg Germany Heidenhofstraße 2 Freiburg i.Br. Germany

Photovoltaic (PV) laminates are attached to aluminium frames using adhesives, which provide structural stability. In most Finite Element Method (FEM) simulations of PV modules, the importance of frame attachments and adhesion between the frame and PV laminate is ignored by using a simplified model in terms of geometry and material model, though they have a definite impact on the behaviour of the module [1]. This can be due to the increase in the computational cost and the complexity of identifying the appropriate material model for the adhesives. However, the adhesive has a strong influence on the behaviour of the PV module exposed to mechanical load. High loads might lead to the detachment of the adhesive and, consequently, the failure of the PV module. Studying the influence of the adhesive, its response under load, and understanding the strength of the adhesive are essential for a correct modelling of the PV module and hence preventing damage to PV modules. Therefore, within this work, two materials, a one-component silicone (1C silicone) and a two-component silicone (2C silicone), are analysed and modelled using a 2-parameter Mooney-Rivlin incompressible hyperelastic material model. The material model is validated using a single lap shear test. A suitable failure criterion is identified at ambient temperature for one-component silicone through an experimental investigation focusing on the tensile and shear stress states of the adhesive. A FEM simulation is performed to determine the stresses in the 1C silicone in a PV module under mechanical load. The comparison to the failure stresses shows, that the stress values within the adhesive are far below the failure stress and hence no frame detachment is expected.

关键词： Analytical models Computational modeling mathematical models Finite element analysis Structural engineering Laminates Thermal loading

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