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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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Development of a human FE model with 3-D geometry of muscles and lateral impact analysis for the arm with muscle activity

Development of a human FE model with 3-D geometry of muscles...

引用

digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Iwamoto, Masami Nakahira, Yuko Kimpara, Hideyuki Sugiyama, Takahiko Toyota Central R and D Labs. Inc.

To investigate the effect of muscle activity in pre-impact on injury outcome, we developed a human arm finite element model with muscles which consisted of solid elements and truss elements that could be used for simulating muscle stiffness change for the inputted activity and 3-D geometry of each muscle. Two series of experimental tests on muscle stiffness change and arm flexion were conducted for validation of the model. Comparisons between the simulation results and test data indicated the model validity. Lateral impact simulations for a left arm demonstrated that the muscle activity in pre-impact had significant effects on the motion and stress distribution of the arm bones. Copyright © 2009 SAE International.

关键词： Muscle

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Collective intelligence system engineering 09

Collective intelligence system engineering

引用

1st ACM International conference on Management of Emergent digital EcoSystems, MEDES '09

作者： Lykourentzou, Ioanna Vergados, Dimitrios J. Loumos, Vassili School of Electrical and Computer Engineering National Technical University of Athens Greece

ISBN: (纸本)9781605588292

Collective intelligence (CI) is an emerging research field which aims at combining human and machine intelligence, to improve community processes usually performed by large groups. CI systems may be collaborative, like Wikipedia, or competitive, like a number of recently established problem-solving companies that attempt to find solutions to difficult R&D or marketing problems drawing on the competition among web users. The benefits that CI systems earn user communities, combined with the fact that they share a number of basic common characteristics, open up the prospect for the design of a general methodology that will allow the efficient development and evaluation of CI. In the present work, an attempt is made to establish the analytical foundations and main challenges for the design and construction of a generic collective intelligence system. First, collective intelligence systems are categorized into active and passive and specific examples of each category are provided. Then, the basic modeling framework of CI systems is described. This includes concepts such as the set of possible user actions, the CI system state and the individual and community objectives. Additional functions, which estimate the expected user actions, the future state of the system, as well as the level of objective fulfillment, are also established. In addition, certain key issues that need to be considered prior to system launch are also described. The proposed framework is expected to promote efficient CI design, so that the benefit gained by the community and the individuals through the use of CI systems, will be maximized. Copyright 2009 ACM.

关键词： Systems engineering

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Laboratory demonstration of a tether sling for space transportation

Laboratory demonstration of a tether sling for space transpo...

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作者： Tragesser, Steven Sandager, Leif Harder, Scott Department of Mechanical and Aerospace Engineering University of Colorado at Colorado Springs 1420 Austin Bluffs Pkwy Colorado Springs CO 80933 United States

ISBN: (纸本)9781563479793

A tether sling holds tremendous promise as an energy storage device, permitting space transportation systems capable of injecting a large number of payloads with low incremental costs. The Space Grant student organization at the University of Colorado is developing a scaled-down laboratory model of the tether sling to demonstrate the feasibility of the basic concept and study the engineering challenges of the system. Like the actual system, the laboratory demonstrator consists of an electric motor, a tether with the payload attached to the end of the tether and a platform that transfers the energy from the motor into the spinning tether. This paper describes the design of the bearing assembly, motor and drive train, deployment mechanism, tether angle sensor, and the digital control and data acquisition system. Data from the laboratory demonstrator is used to validate the dynamic modeling and control law development. Copyright © 2009 by Steven G. Tragesser.

关键词： Laboratories

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Sight analysis with 'RAMSIS Cognitive': Step II

Sight analysis with 'RAMSIS Cognitive': Step II

引用

digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Remlinger, Wolfram Bubb, Heiner Wirsching, Hans-Joachim Department of Ergonomics Technische Universität München Germany Human Solutions GmbH Kaiserslautern Germany

The perception of visual information is the major input requirement for the psychological cognition process. The quality of perception of visual information is impaired by the geometrical and optical conditions of the displayed information. This concerns all technical information of the car as instruments, optical indicators, telltales and control displays. The international widely-used 3D-Man-Model System RAMSIS receives some additional functionality for analysis and practical design to simulate these viewing conditions in the car. These new RAMSIS functions include methods for the analysis of sight shadows, limits of visibility of liquid crystal displays, the time of focus shifts of the driver and the modelling of the optical parameters of head-up displays. These capabilities will enable a RAMSIS user to allow for (degraded) visual performance when designing the rising number of user interface displays in cars and airplanes. Copyright © 2009 SAE International.

关键词： User interfaces

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Validation of the human Motion Simulation Framework: Posture Prediction for standing object transfer tasks

Validation of the Human Motion Simulation Framework: Posture...

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digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Zhou, Wei Reed, Matthew P. University of Michigan United States

The human Motion Simulation Framework is a hierarchical set of algorithms for physical task simulation and analysis. The Framework is capable of simulating a wide range of tasks, including standing and seated reaches, walking and carrying objects, and vehicle ingress and egress. In this paper, model predictions for the terminal postures of standing object transfer tasks are compared to data from 20 subjects with a wide range of body dimensions. Whole body postures were recorded using optical motion capture for one-handed and two-handed object transfers to target destinations at three angles from straight ahead and three heights. The hand and foot locations from the data were input to the HUMOSIM Framework Reference Implementation (HFRI) in the Jack human modeling software. The whole-body postures predicted by the HFRI were compared to the measured postures using a set of measures selected for their importance to ergonomic analysis. The results demonstrate that the HUMOSIM Framework standing posture predictions agree well with motion capture data, with particularly high correlations observed for the important predictions of torso inclination and hand-to-shoulder distance. Copyright © 2009 SAE International.

关键词： Forecasting

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Geometric estimation of FoV for vision modeling in DHM

Geometric estimation of FoV for vision modeling in DHM

引用

digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Vinayak Sen, Dibakar Indian Institute of Science India

This paper presents a geometric method for estimating the filed-of-view (FoV) for monocular and binocular vision using a 3D scanned human face. The traditional vision-cone approach offers simplicity but may lead to spurious inferences during ergonomic evaluations involving peripheral vision. FoV is asymmetric due to unrestricted zygomatic vision and restrictions on nasal side. Thus its accurate modeling is important for effective simulation of visual performance. Given a tessellated face model and the location of the pupil, the present work computes the FoV edges on the face with respect to the pupil. The algorithm is divided in two steps, visible triangle computation and silhouette edge detection for FoV estimation. A qualitative comparison of samples with the standard perimetry data and right circular cones used in DHM shows that the FoV is very similar to the physiological visual-field maps and the cones used in DHM are conservative. The proposed approach has been extended to gaze dependant field-of-view computation which is difficult to obtain experimentally due to involuntary eye movements in subjects. The gaze-dependant FoV is found to be significantly different from normal monocular and binocular FoV. Thus the present computational FoV paradigm has the potential of active vision integration in performance evaluations using DHM's. Copyright © 2009 SAE International.

关键词： Edge detection

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Virtual body generator for anthropometry and physiology based modeling

Virtual body generator for anthropometry and physiology base...

引用

digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Wilkerson, Patrick Zhou, Xianlian Przekwas, Andrzej Buhrman, John Cheng, Huaining CFD Research Corporation 215 Wynn Drive Huntsville AL 35805 United States Air Force Research Laboratory

We believe that the future of human body testing in military and civilian applications is in using a new generation of "dummies" - "virtual humans". CFDRC's CMB (Computational Medicine and Biology) research group has developed an integrated bioinformatics software framework for intelligent analysis of biomedical databases, generation of geometrical models for simulations, and modeling setup for human biomechanical and physiological performance. The integrated 3D Java based software framework is a fully user-interactive Virtual Body framework for creation and editing the Virtual Body and acting as a front end for multi-scale anthropometry/anatomy physics based simulation software. This paper presents a software framework for visual manipulation and processing of human body anthropometric, skeletal, joint, skin, vascular and other anatomical databases. We have demonstrated the framework for scan/anatomy based virtual human body model generation and predictive simulation of cardiovascular system responses to high-g aircraft maneuvers and blast wave impact. The Virtual Body software allows for complete user control and editing of morphing capabilities of various anatomical systems, including the skin, joints, skeleton, vasculature and organs, with a framework designed for additional anatomical systems such as muscles, nerves and lymphatics. It provides the capability to generate/edit the static/dynamic human body models from laser scans, anthropometric databases, and other image based anatomical techniques such as motion capture, for predictive modeling of human body performance. The generated anatomical systems in the Virtual Body are fully linked together, with all anatomical systems mapped to the underlying skeleton framework, allowing for complete manipulation of all anatomical systems via skeleton framework manipulation. The Virtual Body also acts as a data-generator/preprocessor for available human body simulation software including biomechanics, ergonomics, cardi

关键词： Anthropometry

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Relational description to parametric evolution of mudras

Relational description to parametric evolution of mudras

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digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Vipin, J.S. Sen, Dibakar Centre for Product Design and Manufacturing Indian Institute of Science Bangalore - 560012 Karnataka India

The objective of this work is to use the relational configuration schema to describe hand postures and to simulate the posture-evolution. First, a general scheme of vocabulary for describing relational configurations is developed. Translating the conventional way of describing relationships using this scheme it is found that it is possible to evolve a structured way of picking description elements from the vocabulary which is amenable to computer implementation. This is demonstrated through a contact based description of hand posture and determination of the respective hand configuration through an optimization based inverse kinematics formulation. In the second part, grasp-evolution is simulated. A linear interpolation and Bezier interpolation between two specified Mudras or hand postures have been studied. Intermediate Mudras necessary for specification of the control polygon of the Bezier is obtained from traversal of the Mudra hierarchy studied earlier. It is found that, when a comparison is made with human performance of postural transitions, similarity of the computed transitions depend upon the number of intermediate Mudras;when this number is not large, Bezier interpolation scheme provides reasonably natural transition. Copyright © 2009 SAE International.

关键词： Inverse kinematics

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design of a mock-up for supported ingress/egress using a DHM

Design of a mock-up for supported ingress/egress using a DHM

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digital human modeling for design and engineering conference and Exhibition, DHM 2009

作者： Sabbah, Adel Olaf Zaindl, Albert Bubb, Heiner Lehrstuhl für Ergonomie Technische Universität München Boltzmannstrasse 15 D-81757 Garching bei München Germany

This paper presents the usage of the digital human Models (DHM) PCMAN and RAMSIS to determine parameters for a supported ingress and egress on a mock-up. Sports cars with lower seating positions show occurring difficulties among older drivers during ingress/egress. To equip sports cars with higher seats or narrow door sills seems limited due to design aspects. Therefore the idea of an ingress/egress support system arose. To build a mock-up, it needs specific dimensions already in the CAD design phase. Here DHM-systems are utilized. As no similar systems are known, no ballpark figures for trajectories of the seat or movement ranges can be derived from literature. Therefore pre-tests were done with a simple manually moved seat. Test persons showed high acceptance and discomfort reduction. In order to design a proper testing environment for repeatable and reliable results, a variable seat with electric motors is built into a mock-up with a package of a sports car. Previous tests of ingress/egress filmed from three perspectives on the same mock-up were digitized with PCMAN and imported to RAMSIS in CATIA V5. The manikin movements and CAD model of the movable seat are attached, while avoiding penetrations of body parts with any car geometry e.g. roof edge. Herewith it is possible to rapidly determine the range of movement for the seat in the mock-up. Moreover these requirements help to reduce costs and development time. The result of the study shows an application for DHM systems to specify the design of test environments. Copyright © 2009 SAE International.

关键词： Computer aided design

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2009 Latin American Web Congress - Joint LA-WEB/CLIHC conference

2009 Latin American Web Congress - Joint LA-WEB/CLIHC Confer...

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2009 Latin American Web Congress - Joint LA-WEB/CLIHC conference

ISBN: (纸本)9780769538563

The proceedings contain 31 papers. The topics discussed include: enhancing a wearable help button to support the medication adherence of older adults;augmenting cognitive stimulation activities in a nursing home through pervasive computing;taking care of our elders through augmented spaces;a comparison study: sketch-based interfaces versus WIMP interfaces in three dimensional modeling tasks;model driven engineering of rich internet applications equipped with zoomable user interfaces;a model-based approach for developing vectorial user interfaces;towards canonical task types for user interface design;recoverability walkthrough: an alternative to evaluate digital inclusion interfaces;using semiotic inspection method to evaluate a human-robot interface;promoting creative design through toolkits;and conceptual metaphors for designing multi-cultural applications.

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