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检索条件"任意字段=Digital Human Modeling for Design and Engineering Conference and Exposition"

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An Innovative design and Mathematical Implementation of an Electrical Model of the human Circulatory System under ESD Stress

An Innovative Design and Mathematical Implementation of an E...

引用

International conference and exposition on Electrical and Power engineering (EPE)

作者： Nicuta, Ana-Maria Adochiei, Narcis-Iulian Gheorghe Asachi Tech Univ Iasi Iasi Romania

ISBN: (纸本)9781467311724;9781467311731

In order to observe the impact of the electrostatic charges on human body, the paper investigates the mathematical modeling of the human circulatory system and the equivalent electrical circuit, modeled as an electrical net. The mathematical implementing and the modeling of the equivalent electrical circuit that simulates the electrical activity of the human circulatory system has a major importance not only for analyzing the electrostatic discharge phenomena in engineering applications but also in getting information about different means of detecting various human diseases.

关键词： human circulatory system blood flow static electricity Electrostatic Discharge (ESD)

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PROBABILISTIC APPROACH FOR digital human KINEMATIC AND DYNAMIC RELIABILITIES

PROBABILISTIC APPROACH FOR DIGITAL HUMAN KINEMATIC AND DYNAM...

引用

ASME International design engineering Technical conferences/Computers Information in engineering conference

作者： Gragg, Jared Yang, Jingzhou (James) Yang, Guolai Texas Tech Univ Dept Mech Engn Human Centr Design Res Lab Lubbock TX 79409 USA

ISBN: (纸本)9780791845028

Traditionally, deterministic methods have been applied in digital human modeling (DHM). Transforming the deterministic approach of digital human modeling into a probabilistic approach is natural since there is inherent uncertainty and variability associated with DHM problems. Typically, deterministic studies in this field ignore this uncertainty or try to limit the uncertainty by employing optimization procedures. Due to the variability in the inputs, a. deterministic study may not be enough to account for the uncertainty in the system. Probabilistic design techniques allow the designer to predict the likelihood of an outcome while also accounting for uncertainty, in contrast to deterministic studies. The purpose of this study is to incorporate probabilistic approaches to a deterministic DHM problem that has already been studied, analyzing human kinematics and dynamics. The problem is transformed into a probabilistic approach where the human kinematic and dynamic reliabilities are determined. The kinematic reliability refers to the probability that the human end-effector position (and/or orientation) falls within a specified distance from the desired position (and/or orientation) in an inverse kinematic problem. The dynamic reliability refers to the probability that the human end-effector position (and/or velocity) falls within a specified distance from the desired position (and/or velocity) along a specified trajectory in the workspace. The dynamic equations of motion for DHM are derived by the Lagrangian backward recursive dynamics formulation.

关键词： Probabilistic design inverse kinematics human dynamics digital human modeling

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MOTION CAPTURE AND VIRTUAL humanS TO ENHANCE ERGONOMIC design AND VALIDATION OF REFRIGERATED DISPLAY UNITS

MOTION CAPTURE AND VIRTUAL HUMANS TO ENHANCE ERGONOMIC DESIG...

引用

ASME International design engineering Technical conferences/Computers Information in engineering conference

作者： Colombo, Giorgio De Vecchi, Giordano Regazzoni, Daniele Rizzi, Caterina Politecn Milan Dept Mech Engn Via G La Masa 1 I-20156 Milan Italy Univ Bergamo COGES Ctr I-24044 Dalmine Italy Univ Bergamo Dept Ind Engn I-24044 Dalmine Italy

ISBN: (纸本)9780791845011

This paper presents a computer-aided environment to analyze postures and movements in order to ergonomically validate the design of potentially any device a man or woman may have to deal with. The proposed environment integrates virtual prototyping techniques with digital human modeling and Motion Capture techniques to determine fatigue, stress and risk for workers' health. We considered a vertical refrigerated display unit as case study to analyze the interaction of supermarket staff filling the shelves with goods with the main goal determining the suitability of operators' working condition and, eventually, providing a feedback to the design step. The paper, after a brief description of the state of the art of the Motion Capture system and digital human modeling, presents the architecture of the integrated environment developed and the working paradigm. At last preliminary results of the experimentation as well benefits and the limits of the outcomes achieved so far in the automation of ergonomics in machines design are presented.

关键词： Health risks

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Development of a web-based Rapid Prototyping and Product design course

Development of a web-based Rapid Prototyping and Product des...

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119th ASEE Annual conference and exposition

作者： Ertekin, Yalcin M. Chiou, Richard Engineering Technology Program Drexel University United States

ISBN: (纸本)9780878232413

This paper presents development of an integrated web-based rapid prototyping and product design course in the online Master of Science degree in engineering technology core discipline. The topics are aligned with a current trend for rapid product realization and information-integrated product design systems in industry, which currently includes rapid prototyping coupled with computer aided product design and development that provides zero-lead times in product conception and development. The main goal of the developed course is to simulate this real-life engineering development experience for our online graduate students who will work in teams to develop consumer products and at the end able to produce Acrylonitrile butadiene styrene (ABS) plastic prototypes using web-based remote log-in capability of the rapid prototyping machine. Hardware and software components are integrated with prototyping methodologies to achieve maximum effectiveness in teaching web-based prototyping concepts in ET615-Rapid Prototyping and Product design. The course includes theory and application of rapid prototyping technologies for new product conceiving, designing, manufacturing and testing. It also addresses the importance and examples of product design modeling and virtual prototyping. A survey of modern tools of digital prototyping and basics of solid modeling and Computer Aided design-CAD technologies for prototyping are provided. © 2012 American Society for engineering Education.

关键词： Product design

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Quantitative modeling and Analysis of Substation Automation Systems

Quantitative Modeling and Analysis of Substation Automation ...

引用

IEEE PES Transmission and Distribution conference and exposition

作者： Falahati, Bamdad Darabi, Zahra Fu, Yong Vakilian, Mehdi Mississippi State Univ Dept Elect & Comp Engn Starkville MS 39762 USA

ISBN: (纸本)9781467319355

The application of digital technologies in power systems has resulted in an evolutionary replacement of electromechanical devices with numerical ones featuring internal digital processors with communication capabilities. A substation automation system (SAS) deploys substation operation functions, including control, protection, monitoring, and measuring. Ethernet technology and local area networks (LANs) make it possible to design substation communication architectures with greater reliability, availability, speed, and cost savings than conventional hard-wired systems. This paper proposes a new method to describe topologies of the SAS as an interconnected network. The concept of data conduction is introduced in this paper, and the advanced connectivity approach is implemented in the form of a linear programming optimization problem for all intelligent electronic devices (IEDs). All SAS values and specifications are available through several data structures, facilitating a quantitative reliability evaluation of the SAS. Two simple case studies show the applicability of this model.

关键词： Substation automation system (SAS) IEC-61850 Ethernet reliability connectivity

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modeling OF DIFFUSE DAMAGE NEAR MICRO CRACKS IN human CORTICAL BONE

MODELING OF DIFFUSE DAMAGE NEAR MICRO CRACKS IN HUMAN CORTIC...

引用

11th ASME Biennial conference on engineering Systems design and Analysis, (ESDA 2012)

作者： Budyn, E. Hoc, T. Univ Illinois Dept Mech & Ind Engn Chicago IL 60607 USA

ISBN: (纸本)9780791844878

Haversian cortical bone is a mineralised tissue that undergoes micro damage under daily exercise. Micro damage can either be identiable by light microscopy as microcracks or be more diffuse and difficult to visualise. Bone is maintained by mechano-sensitive cells called osteocytes located throughout the tissue. However the local mechanical stimulations on the cells are not precisely quantied. A dual experimental and numerical approach is presented to measure the in situ stress field produced by microcracks in human bone. Using the strain energy balance, the stress eld is reconstructed in the vicinity of quasi-static microcracks that are advancing in the explicit bone morphology captured by digital image correlation. The stress eld reveals the presence of diffuse damage near microcracks in agreement with experimental observations in the literature.

关键词： Strain energy

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SIMULATION-BASED design OF ORTHOPEDIC TRAUMA IMPLANTS

SIMULATION-BASED DESIGN OF ORTHOPEDIC TRAUMA IMPLANTS

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ASME International Mechanical engineering Congress and exposition (IMECE)

作者： Arnone, Joshua C. Ward, Carol V. Della Rocca, Gregory J. Crist, Brett D. El-Gizawy, A. Sherif Univ Missouri Columbia MO 65211 USA

ISBN: (纸本)9780791844267

A computer-aided simulation model is developed to aid in the design and optimization of orthopaedic trauma implants. The developed model uses digital imaging, computer-aided solid modeling, and finite element methods in order to study the effects of various geometric parameters of fixation devices in orthopedic surgery practice. The results of the present simulation model would lead to the determination of the optimum implant design that provides the best match with the geometry of the human femur reducing the risk of over-stressing bone tissue during implant insertion. The effectiveness of the presented simulation model is demonstrated through the design of intramedullary (IM) nails used in treating femoral shaft fractures. CT scans were taken of forty intact human femora. A technique was developed in order to digitally reconstruct the scans into 3D solid models using image segmentation, surface simplification, and smoothing methods while maintaining accurate representation of the original scans. Each resulting surface model is characterized by a network of nearly equilateral triangles of approximately the same size allowing for quality finite element meshing. Femoral lengths, curvature, shaft diameters, and location of maximum curvature were then quantified. An average geometric model was then generated for the investigated sample by averaging corresponding nodal coordinates in each femur model. Using the average model, a length-standardized function representing the curvature of the medullary canal was derived to create a geometrically optimized IM nail for the entire sample. "Virtual surgery" simulating the insertion process was then performed using finite element methods in order to validate the proposed optimal IM nail design. The results of both the optimum nail and a current nail were compared using the femur having the highest curvature in the sample. The present study shows that the developed simulation model leads to a nail design that reduces the inserti

关键词： Finite element method

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USB-powered portable experiment for classical control with MATLAB Real-Time Windows Target

USB-powered portable experiment for classical control with M...

引用

119th ASEE Annual conference and exposition

作者： Enikov, Eniko T. Campa, Giampiero Aerospace and Mechanical Engineering Department University of Arizona United States MathWorks United States

ISBN: (纸本)9780878232413

engineering education has the objective of not only presenting the scientific principles, i.e., engineering science, but also of teaching students how to apply these to real problems. Therefore, hands-on laboratories have been an integral part of the engineering curriculum since its inception. This presentation will demonstrate the use of a novel low-cost experimental apparatus for use in a typical undergraduate course in control systems taught to mechanical engineering students, i.e. students with limited exposure to electrical engineering. The system demonstrates the use of MATLAB tools such as Simulink Real Time Windows Target and Control Systems toolboxes to illustrate all stages of design of a closed-loop control systems including: system modeling, parameter identification, analysis of stability of a closed-loop system, design of dynamic compensator in the continuous space and implementation of an equivalent digital controller using the Simulink Real Time Windows Target environment. The hardware apparatus consists of a DC micro-motor attached to a carbon fiber rod. The angular displacement is measured with an analog potentiometer, which acts as the pivot point for the carbon fiber rod. The DC micro-motor is powered by a low cost, custom circuit board, which is USB-powered requiring no external power adaptor or extra cabling. Attached to the micro-motor is a small propeller which provides thrust force needed to rotate the pendulum to a desired angle. The experiment is designed to operate from student's laptops, therefore no special laboratory space is required. The project was tested in a classical control systems design class offered to senior-level mechanical engineering students. Student feedback and survey data on the effectiveness of the module are presented along with examples of student assignments illustrating the use of hardware. © 2012 American Society for engineering Education.

关键词： Simulink

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modeling and testing of multi-resolution morphological gradient distance relay algorithm

Modeling and testing of multi-resolution morphological gradi...

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2011 2nd International conference on Advances in Energy engineering, ICAEE 2011

作者： Saad, A.A. El-Naggar, M.F. Shehab-Eldin, E.H. Electrical Power and Machines Department Faculty of Engineering Helwan University 1 Sherif Helwan Cairo Egypt

This paper describes modeling and testing of a digital distance relay for transmission line protection using MATLAB/SIMULINK. ATP is used for detailed modeling of a power system network and fault simulation. SIMULINK is used to implement multi-resolution morphological gradient (MMG) relaying algorithm. MMG modeling is an interactive simulation environment for relaying algorithm design and evaluation. The basic principles of MMG relaying algorithm and some related algorithms such as tripping and fault location scheme are also described in this paper. Test results show that MMG relaying algorithm can detect and define fault location accurately within 1 milli-second. © 2011 Published by Elsevier Ltd.

关键词： Mathematical morphology

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An innovative design and mathematical implementation of an electrical model of the human circulatory system under ESD stress

An innovative design and mathematical implementation of an e...

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International conference and exposition on Electrical and Power engineering (EPE)

作者： Ana -Maria Nicuta Narcis -Iulian Adochiei Gheorghe Asachi Technical University of Iasi Romania

In order to observe the impact of the electrostatic charges on human body, the paper investigates the mathematical modeling of the human circulatory system and the equivalent electrical circuit, modeled as an electrical net. The mathematical implementing and the modeling of the equivalent electrical circuit that simulates the electrical activity of the human circulatory system has a maj or importance not only for analyzing the electrostatic discharge phenomena in engineering applications but also in getting information about different means of detecting various human diseases. The analyses of the whole circulatory system were performed, using the software programs MAT LAB and Cadence.

关键词： humans Circulatory system Electrostatic discharges Mathematical model Heart Integrated circuit modeling Blood flow

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