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

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Control strategies for simulating human movement

Control strategies for simulating human movement

引用

digital human modeling for design and engineering conference and exposition

作者： Raschke, Ulrich Schutte, Lisa Volberg, Ovsei Transom Technologies Inc. United States

The simulation of natural human motion remains a challenge. Considerable effort has been spent searching for methods that accurately predict how humans move under different task and environmental conditions. Motivation for these investigations comes from both an interest to understand how the human biological system controls complex motions, and by a need for reasonable motion prediction for a wide range of animation needs. A list of performance criteria is used to review the more popular control methods that have been described in the literature. Apparent from the review is that currently no single method exists for general human movement simulation, yet the eventual construct of a successful controller is becoming more apparent. © 1998 Society of Automotive Engineers, Inc.

关键词： Motion estimation

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VirtualMan: A high precision, fully articulated human model

VirtualMan: A high precision, fully articulated human model

引用

digital human modeling for design and engineering conference and exposition

作者： Carrier, Robert Del Castillo, Vincent Papin, Jean-Paul Ruisseau, Jean-Yves Les Consultants Genicom Inc. Canada Etas Etablissement d'Angers Canada

Computer models of the human body geared towards ergonomic analysis generally have a robot-like appearance. While some analysis tasks do not require a better representation, a high precision body surface is essential to perform some ergonomical analysis tasks. Recent advances in 3D digitization allow for whole body scanning, at a speed that allows the scanned subject to keep a static posture throughout the entire scanning process. It is hence possible to scan a subject at different key postures, and to then use an interpolation technique to model the deformation of the body as a function of the data acquired at each key posture. This paper addresses the development of VirtualMan, a software featuring an articulated human model capable of representing muscular deformation with an accuracy of 3-4 mm. © 1998 Society of Automotive Engineers, Inc.

关键词： Deformation

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A model to predict human motion during lifting

A model to predict human motion during lifting

引用

digital human modeling for design and engineering conference and exposition

作者： Ayoub, M.M. Woldstad, J.C. Lin, C. Joe Bernard, Tracey Department of Industrial Engineering Texas Tech University United States Department of Industrial Engineering Chung Yuan Christian University China Department of Occupational Safety and Health Murray State University United States

This paper reports on a dynamic simulation model developed for biomechanical analyses of lifting activities performed in the sagittal plane. The model simulates the dynamic motion of lifting tasks for five body joints: the elbow, shoulder, hip, knee, and ankle. The inputs to the model include initial and final joint postures;gender, weight, and height;weight of load;lifting height;and container dimensions. The model predicts the kinetics and kinematics for the lift. Actual motion data were collected using 10 subjects in the laboratory for 360 lifts which consisting of 12 lifting tasks including two lifting heights, two container sizes, and three weights of load. Results demonstrate that the simulation model can be an effective alternative to collecting posture and time-displacement data for lifting task analyses. © 1998 Society of Automotive Engineers, Inc.

关键词： Containers

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Economic analysis of the ultra light steel auto body

Economic analysis of the ultra light steel auto body

引用

international Body engineering conference and exposition

作者： Roth, Richard Dieffenbach, Jeff R. Koehr, Robert Isaacs, Jacqueline A. Materials Systems Laboratory Center for Technology Policy and Industrial Development Massachusetts Institute of Technology United States IBIS Associates Inc. Wellesley MA United States Porsche Engineering Services Troy MI United States Northeastern Univ. Department of Mechanical Industrial and Manufacturing Engineering United States

Aluminum and polymer composites have long been considered the materials of choice for achieving mass reduction in automotive structures. As consumer and government demand for mass reduction grows, the use of these materials, which have traditionally been more expensive than the incumbent steel, becomes more likely. In response to this growing challenge, the international steel community has joined forces to develop the Ultra Light Steel Auto Body (ULSAB). The resulting design saves mass and increases performance relative to current steel unibodies. Although mass savings are not as dramatic as those achieved by alternative materials, this design offers the potential to be accompanied by a manufacturing cost reduction. The projected manufacturing piece and investment cost for the ULSAB are investigated using technical cost modeling. The results presented here examine the elements that contribute to the cost, including treatments for stamping, hydroforming, assembly and purchased parts. Particular emphasis is placed on the procedure for laying out the design of the manufacturing and production facility based on the respective manufacturing processes, production rates, labor requirements, equipment and tooling costs, and so on. The results of this paper provide material suppliers and automakers with a framework for understanding the technical and economic advances that are possible with the implementation of the ULSAB technology approach. Through this understanding, decisions regarding investments of limited human and financial capital can be implemented. Copyright © 1998 Society of Automotive Engineers, Inc.

关键词： Cost reduction

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Optimal postures and positioning for human body scanning

Optimal postures and positioning for human body scanning

引用

Proceedings of the 1997 1st international conference on Recent Advances in 3-D digital Imaging and modeling

作者： Brunsman, Matthew A. Daanen, Hein M. Robinette, Kathleen M. Sytronics Inc Dayton United States

Advancements in technology for digitizing the surface of the human body are providing new opportunities for research in engineering anthropometry, the study of human body measurement for design and evaluation purposes. The availability of the technology is just the first step in applying surface scanning to engineering anthropometry: several issues remain to be resolved to make these tools useful for engineering applications. One important issue is the standardization of positioning and the posture of the subject for scanning. In engineering it is not enough to be able to measure one individual one time in one posture, but it is also necessary to measure the individual in different postures and compare the individual with many other people who have been comparably measured. Not surprisingly, people can be more difficult to measure precisely than fixed stationary objects. In the process of developing standardized procedures for surveying the civilian populations of North America and Europe, an experiment was conducted to determine optimal scanning positions. While this experiment used just one type of scanning technology, many of the methods are transferable to other methods as well. This paper discusses the results from that investigation.

关键词： Object recognition

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Computer 3-d site model generation based on aerial images

Computer 3-d site model generation based on aerial images

引用

2nd conference on Technologies for Synthetic Environments - Hardware-in-the-Loop Testing

作者： Zheltov, SY Blokhinov, YB Stepanov, AA Skryabin, SV Sibiryakov, AV State Research Institute of Aviation Systems (Russia)

ISBN: (纸本)0819424994

The technology for three-dimensional model design of real world scenes and its photorealistic rendering are current topic of investigation. Development of such technology is very attractive to implement in vast variety of applications: military mission planning, crew training, civil engineering, architecture, virtual reality entertainments - just a few was mentioned. 3D photorealistic models of urban areas are often discussed now as upgrade from existing two-dimensional geographic information systems. Possibility of site model generation with small details depends on two main factors: available source dataset and computer power resources. In this paper PC based technology is presented, so the scenes of middle resolution (scale of 1:1000) be constructed. Types of datasets are the gray level aerial stereo pairs of photographs (scale of 1:14000) and true color on ground photographs of buildings (scale ca. 1:1000). True color terrestrial photographs are also necessary for photorealistic rendering, that in high extent improves human perception of the scene.

关键词： digital photogrammetry 3D computer graphics site modeling orthoimage digital terrain model feature extraction texture mapping

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Optimal postures and positioning for human body scanning

Optimal postures and positioning for human body scanning

引用

international conference on 3D Imaging, modeling, Processing, Visualization and Transmission (3DIMPVT)

作者： M.A. Brunsman H.M. Daanen K.M. Robinette Sytronics Inc. Dayton USA TNO Human Factors Research Institute Soesterberg Netherlands Computerized Anthropometric Research and Design Laboratories OH USA

Advancements in technology for digitizing the surface of the human body are providing new opportunities for research in engineering anthropometry, the study of human body measurement for design and evaluation purposes. The availability of the technology is just the first step in applying surface scanning to engineering anthropometry; several issues remain to be resolved to make these tools useful for engineering applications. One important issue is the standardization of positioning and the posture of the subject for scanning. In engineering it is not enough to be able to measure one individual one time in one posture, but it is also necessary to measure the individual in different postures and compare the individual with many other people who have been comparably measured. Not surprisingly, people can be more difficult to measure precisely than fixed stationary objects. In the process of developing standardized procedures for surveying the civilian populations of North America and Europe, an experiment was conducted to determine optimal scanning positions. While this experiment used just one type of scanning technology, many of the methods are transferable to other methods as well. This paper discusses the results from that investigation.

关键词： humans Anthropometry Time measurement Force measurement North America Europe Head Area measurement Laboratories design engineering

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VHDL-based design of biologically inspired pitch detection system

VHDL-based design of biologically inspired pitch detection s...

引用

international conference on Neural Networks

作者： S.C. Lim A.R. Temple S. Jones R. Meddis Department of Electronic and Electrical Engineering Loughborough University Loughborough Leicestershire UK Department of Psychology University of Essex UK

engineering researchers at Loughborough University and hearing researchers at Essex University are working together to produce a real-time digital electronic pitch extraction system based on neuromorphic principles and implemented in digital technology. This paper reports on the VHDL simulations of the system which demonstrates good and robust pitch tracking across the human voice range.

关键词： Band pass filters Brain modeling Auditory system Neuromorphics Biomedical signal processing Frequency humans Speech Biological system modeling Integrated circuit modeling

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TARGET DISCRIMINATION USING COMPUTATIONAL VISION human PERCEPTION MODELS 5

TARGET DISCRIMINATION USING COMPUTATIONAL VISION HUMAN PERCE...

引用

conference on Infrared Imaging Systems: design, Analysis, modeling, and Testing V

作者： LINDQUIST, GH WITUS, G COOK, TH FREELING, JR GERHART, GR OPTIMETR INC ANN ARBORMI 48104

ISBN: (纸本)0819415286

The current DoD target acquisition models have two primary deficiencies: they use simplistic representations of the vehicle and background signatures, and a highly simplified description of the human observer. The current signature representation often fails for complex signature configurations, yields inaccurate detectability and marginal pay-off predictions for low signature vehicles, is not extensible to false alarms and temporal cues, and precludes vehicle design guidance and diagnosis. The current human observer model is simplified to the same degree as the signature representation, and as such is not extensible to high fidelity signature representations. In answer to the noted deficiencies, we have developed the TARDEC visual model (TVM). We have adopted an alternative approach that is based on emerging academic computational vision models (CVM). Our approach is tailored to visual signatures, though the model is applicable to thermal, SAR as well as other categories of imagery. Color imagery, input to the model, is initially transformed into a 3D color-opponent space comprising luminance, red-green, and yellow- blue axes. Each plane in the color-opponent space is then decomposed by local, oriented spatial frequency analyzers (Gabor or wavelet filters) in keeping with current knowledge of retinal/cortical processing. Signal-to-noise statistics are then calculated on each channel, appropriately aggregated over all channels, and used within the signal detection theory context to predict detection and false alarm probabilities.

关键词： Visual process modeling Visualization Target detection Image processing Performance modeling Spatial frequencies Image filtering digital filtering 3D modeling Detection theory

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design OF A MULTISENSOR OPTICAL-SURFACE SCANNER 7

DESIGN OF A MULTISENSOR OPTICAL-SURFACE SCANNER

引用

Sensor Fusion VII conference

作者： BHATIA, GH SMITH, KE COMMEAN, PK WHITESTONE, JJ VANNIER, MW ROSE IMAGING INC CHESTERFIELDMO 63005

ISBN: (纸本)0819416908

A reconfigurable, optical, 3D scanning system with sub-second acquisition of human body surface data was designed and simulated. Sensor elements (digital cameras/light beam projectors) that meet resolution, accuracy, and speed requirements are included in the system design. The sensors are interfaced to video frame grabber(s) under computer control resulting in a modular, low cost system. System operation and data processing are performed using a desktop graphics workstation. Surface data collected with this system can be oversampled to improve resolution and accuracy (viewed by overlapping camera/projector pairs). Multi- resolution data can be collected for different surfaces simultaneously or separately. modeling and calibration of this reconfigurable system are achieved via a robust optimal estimation technique. Reconstruction software that allows seamless merging of a range data from multiple sensors has been implemented. Laser scanners that acquire body surface range data using one or two sensors require several seconds for data collection. Surface digitization of inaminate objects is feasible with such devices, but their use in human surface metrology is limited due to motion artifacts and occluded surfaces. Use of multiple, independent active sensors providing rapid collection and multi-resolution data enable sampling of complex human surface morphology not otherwise practical. 3D facial surface data has provided accurate measurements used in facial/craniofacial plastic surgery and modern personal protective equipment systems. Whole body data obtained with this new system is applicable to human factors research, medical diagnosis/treatment, and industrial design.

关键词： RANGE SENSING MULTIPLE SENSORS CALIBRATION ANTHROPOMETRY

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