Computer Simulation for Ergonomic Bus Operator Workstation Design With Validation

1998 ◽  
Author(s):  
H. You ◽  
B. Oesterling ◽  
B. Lowe ◽  
B. J. Gilmore ◽  
A. Freivalds
Keyword(s):  
Computer Simulation ◽  
The Body ◽  
Medium Size ◽  
Kinematic Constraints ◽  
Test Track ◽  
Human Models ◽  
Workstation Design ◽  
Body Joints ◽  
Bus Operator ◽  
Simulation Package

Abstract Bus operator’s workstations neglecting ergonomic features can cause overall discomfort and injuries to the users. This paper presents use of JACK®, a human work simulation package, in designing and evaluating a bus operator workstation which can provide sufficient visibility, natural reach, and comfortable posture for operators who range from the 5th percentile female to the 95th percentile male as defined by SAE J833 (SAE, 1994). Three human models representing the two extremes and their medium size person were created and performed 15 bus operating tasks on the bus workstation implemented in JACK®. Kinematic constraints were defined between the human models and the workstation to simulate the tasks in a realistic manner. While the human models simulated the tasks, the body joints were monitored to determine if they exceeded their comfort ranges recommended by Diffrient et al. (1981) and the workstation was evaluated in terms of visibility, reach, comfort, and adjustability. After the workstation design was refined by iterative modifications and the required component adjustment ranges were determined, the workstation design was prototyped into an actual working bus. A jury of bus operators evaluated the workstation design by operating the prototype on a test track. The response from the operators indicated that the workstation would accommodate the intended population.

Numerical Analysis of the Acoustical Quality of a Multi-Purpose Hall

1995 ◽  
Vol 2 (3) ◽  
pp. 487-500 ◽  
Author(s):  
X.W. Meng ◽  
G. De Borger ◽  
M. Van Overmeire
Keyword(s):  
Computer Simulation ◽  
Sound Pressure Level ◽  
Decay Time ◽  
Sound Pressure ◽  
Field Measurements ◽  
Pressure Level ◽  
Energy Fraction ◽  
Experimental Values ◽  
Simulation Package

In this paper, the acoustical features are described of a multi-purpose auditorium of the Free University of Brussels which were investigated both with field measurements and computer simulation. The convergence of the algorithm of the simulation package RAYNOISE was investigated as a function of the influence on the calculated results of the choice of the number of rays and the reflection order. By comparing the numerical and experimental values of the sound pressure level and early decay time, it is demonstrated that sufficiently accurate acoustical models can be developed. Based on these models, acoustical quantities such as the early energy fraction, sound pressure level, early decay time and early lateral energy fraction were calculated and employed to evaluate the acoustical quality of this multi-purpose hall.

scholarly journals MODELAGEM, SIMULAÇÃO E OTIMIZAÇÃO DA DINÂMICA OPERACIONAL DO PROCESSO DE ATENDIMENTO DE UM PEQUENO POSTO DE SAÚDE

e-xacta ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 101
Author(s):  
José Airton Azevedo dos Santos ◽  
Tiago C. Dal’sotto ◽  
Wesley Schroeder
Keyword(s):  
Computer Simulation ◽  
Appointment Scheduling ◽  
Quantitative Character ◽  
Health Post ◽  
Waiting Room ◽  
Optimization Software ◽  
Simulation And Optimization ◽  
Medical Appointment ◽  
West Region ◽  
Simulation Package

<p>Este trabalho tem como objetivo analisar, através de técnicas de simulação e de otimização, a dinâmica operacional do processo de atendimento de um pequeno posto de saúde localizado na região oeste paranaense. A simulação e a otimização foram executadas utilizando o pacote de simulação Arena®, que inclui o software de otimização Optquest. A metodologia utilizada é a de modelagem através de simulação computacional, de caráter quantitativo e é caracterizada como participativa. A aplicação destas técnicas em conjunto resultaram na otimização do número de agendamento de consultas médicas do posto de saúde.</p><p>Abstract</p><p>This work aims to analyze the attending process operational dynamics of a small health post located in Paraná West Region. Another objective is connect the concepts of simulation and optimization to maximize the number of scheduling appointments for the health post, within the limits of accommodation of the waiting room. The simulation and optimization were performed using the Arena ® simulation package, which includes the OptQuest optimization software. The methodology used was the modeling through computer simulation of quantitative character and it is characterized as participative. The application of these techniques all together resulted in the optimization of the number of medical appointment scheduling of the health post</p>

scholarly journals Body Joints and Trajectory Guided 3D Deep Convolutional Descriptors for Human Activity Identification

2019 ◽  
Vol 8 (12) ◽  
pp. 1016-1021
Keyword(s):  
Optical Flow ◽  
Human Activity ◽  
Large Scale ◽  
Recognition Accuracy ◽  
Computational Cost ◽  
The Body ◽  
Support Vector ◽  
3D Network ◽  
Body Joints ◽  
Body Joint

Human Activity Identification (HAI) in videos is one of the trendiest research fields in the computer visualization. Among various HAI techniques, Joints-pooled 3D-Deep convolutional Descriptors (JDD) have achieved effective performance by learning the body joint and capturing the spatiotemporal characteristics concurrently. However, the time consumption for estimating the locale of body joints by using large-scale dataset and computational cost of skeleton estimation algorithm were high. The recognition accuracy using traditional approaches need to be improved by considering both body joints and trajectory points together. Therefore, the key goal of this work is to improve the recognition accuracy using an optical flow integrated with a two-stream bilinear model, namely Joints and Trajectory-pooled 3D-Deep convolutional Descriptors (JTDD). In this model, an optical flow/trajectory point between video frames is also extracted at the body joint positions as input to the proposed JTDD. For this reason, two-streams of Convolutional 3D network (C3D) multiplied with the bilinear product is used for extracting the features, generating the joint descriptors for video sequences and capturing the spatiotemporal features. Then, the whole network is trained end-to-end based on the two-stream bilinear C3D model to obtain the video descriptors. Further, these video descriptors are classified by linear Support Vector Machine (SVM) to recognize human activities. Based on both body joints and trajectory points, action recognition is achieved efficiently. Finally, the recognition accuracy of the JTDD model and JDD model are compared.

A representation for planar point contact joints in the multibody mechanical bond graph library

1998 ◽  
Vol 212 (4) ◽  
pp. 305-313 ◽  
Author(s):  
W Favre ◽  
S Scavarda
Keyword(s):  
Point Contact ◽  
Bond Graph ◽  
The Body ◽  
Graph Representation ◽  
Kinematic Constraints ◽  
Contact Joint ◽  
Cam Follower ◽  
Mechanical Bond ◽  
Junction Structure ◽  
Two Bodies

In this paper a bond graph representation of the point contact joint between two bodies with any outline curves and in planar motion is proposed. The body geometry and frames are described, the kinematic constraints attached to the point contact joint are identified and the bond graph junction structure is deduced. The example of an elliptic cam-follower is used to illustrate the bond graph representation. In particular this shows the need for the simulation to add strong damping and very stiff elements to the system.

Behavior of the six-legged robot in emergency situation

2020 ◽  
Author(s):  
Yu.F. Golubev ◽  
V.V. Koryanov ◽  
E.V. Melkumova
Keyword(s):  
Computer Simulation ◽  
Analytical Study ◽  
Emergency Situation ◽  
Longitudinal Axis ◽  
The Body ◽  
Legged Robot ◽  
Opposite Edge ◽  
Cyclic Movement ◽  
Truncated Cylinder ◽  
Universal Mechanism

The paper proposes a method of rocking the body of a six-legged robot, which provides a flipping of the body and the return of the robot to the operating position. It is shown that the autonomous rescue of the apparatus from an emergency position “upside down” is possible with the help of cyclic movement of the legs, if the body has an upper shell in the form of a truncated cylinder. The legs on the pre-chosen edge of the body through which the flip should occur, are passive, and straightened along the body so that they do not interfere with the flip. The legs on the opposite edge are active; they perform synchronous movement in a plane perpendicular to the longitudinal axis of the body, with a fixed angle in the knee. An analytical study and computer simulation of the full dynamics of the robot were fulfilled which confirmed the effectiveness of the developed technique for restore the functional capability of the robot. Computer simulation was carried out by means of the Universal Mechanism software package. The results of numerical experiments are presented.

scholarly journals USING THE TECHNICAL EXPERIMENT IN THE COMPUTER SIMULATION TRAINING FOR PROSPECTING SOFTWARE ENGINEERS

2020 ◽  
pp. 216-223
Author(s):  
Maryna Litvinova ◽  
Oleg Dudchenko ◽  
Oleksandr Shtanko ◽  
Svitlana Karpova
Keyword(s):  
Computer Simulation ◽  
Comparative Analysis ◽  
Simulation Training ◽  
New Technology ◽  
The Body ◽  
Training Process ◽  
Software Developers ◽  
Software Engineers ◽  
Further Development ◽  
Modern Standard

In present work, a new technology of the prospective software engineers training in computer simulation is described. The technology provides carrying out comparative analysis of opportunities, productivity, and the accuracy of the reproduction of different computer simulation packages (CSP) on the basis of direct performance of the technical experiment results. Training process includes the principal stages: carrying out of the independent technical experiment; its simulation using of various CSP; comparison of the result of the tested CSP to the results of the experiment; models of debugging; detection of advantages and shortcomings of each involved CSP. As an example, in Open Modelica and Mathcad packages analysis of simulation opportunities of a problem of the motion of the body thrown at an angle to the horizon is carried out. As a result, assessment of the efficiency of each CSP used for the solution of an objective is made. When training prospective software developers the offered technology is the basis for further development of the modern standard in the field of computer simulation.

scholarly journals Body Size and Behaviour Traits of Dogs in Czech Households

2009 ◽  
Vol 78 (1) ◽  
pp. 107-114 ◽  
Author(s):  
Eva Baranyiová ◽  
Antonín Holub ◽  
Mojmír Tyrlík
Keyword(s):  
Body Size ◽  
Body Mass ◽  
The Body ◽  
Medium Size ◽  
Rural Environments ◽  
Size Groups ◽  
Working Dogs ◽  
Average Body Mass ◽  
Household Members ◽  
Giant Size

The objective of this study was to analyse the effect of body size of dogs on their coexistence with humans in Czech households. For this purpose we used questionnaire data on 246 dogs indicating the breed. The dogs were divided into five body size groups, i.e. toy (T, up to 5 kg body mass, n = 32), small (S, 5 - 10 kg body mass, n = 52), medium size (M, 10 - 17 kg body mass, n = 39), large (L, 17 - 33 kg body mass, n = 70), giant (G, over 33 kg body mass, n = 53). The largest dogs surpassed the body mass of the smallest dogs at least seven times, and giant dogs weighed at least one half and toy dogs less than one tenth of the average body mass of people in the Czech human population. Despite this the majority of the studied traits regardless of body mass of the dogs showed no significant differences. In the vast majority of Czech households all dogs were considered household members, taken on travels or vacations, photographed and their birthdays were celebrated. Aggressiveness of the dogs did not correlate with their body size. Among the 84 traits of the behaviour of dogs and their owners, which were analysed, only 23, i.e. 27.4% traits were significantly related to their body mass. Larger and heavier dogs were more frequently kept in houses with yards and gardens, in rural environments. Toy and small dogs prevailed in urbanised environments, in apartments. They were allowed to use furniture, sleep in beds of household members. Moreover, toy dogs predominated in one-person households. Large dogs were more often trained, sometimes by professional trainers, obeyed commands better and were more often described as obedient. They were considered not only as companions but also as working dogs. Giant size dogs were also more often trained to be protective. These data show that the differences in the body size of dogs modified their co-existence with humans only to a limited extent.

Highlights of two and one-half years of simulation efforts for deep submergence vehicles

SIMULATION ◽  
1967 ◽  
Vol 8 (5) ◽  
pp. 283-293
Author(s):  
Tom F. Noble
Keyword(s):  
Computer Simulation ◽  
Control System ◽  
System Design ◽  
Block Diagram ◽  
The Body ◽  
Degree Of Freedom ◽  
Control Input ◽  
Design Work ◽  
Input Devices ◽  
And Control

This paper describes the highlights of two and one-half years of computer simulation effort on the deep submer gence vehicles Trieste II (Trieste), NR-1, and Deep Sub mergence Rescue Vehicle (DSRV). The work, which is still in progress, is being performed by Sperry Gyroscope Com pany under Navy and company-funded programs. Introductory material of the paper presents the simula tion program objectives, outlines the simulation facilities, and gives an overall simulation block diagram. The com puter simulations are being used in control-system, hull, and force-effector design efforts for the development of operational doctrine, as a tool for human engineering as sessment of displays, control input devices, and console layouts, and as a pilot training aid. Basic computation equipment consists of a hybridiza tion between an Electronic Associates 231-R analog com puter and an Ambilog Model 200 digital computer. Major facilities used to supplement these computers are a two- degree-of-freedom cab containing console mockup, pilot's control station, and an electronic flying-spot-scanner tele vision display generator. Major elements characterized in the simulations are six- degree-of-freedom boat dynamics; coordinate transforma tions for television display cues and real-world television pictures; various effectors, actuators, and sensors; and control computer equations. The body of the paper gives details on the use of the computer simulation in deep submergence craft design work. The design stages are broken down as: statement of design criteria, analysis of system parts, analysis of com plete system, synthesis of system design, fabrication of system hardware, test and evaluation, and improvement of design. Unique hull, effector, actuator, and control-system design problems encountered during the two-and-one- half-year simulation study are outlined.. This paper on simulation is concluded with a summary which indicates the need for highly integrated displays, control input devices, and control computers for deep sea craft.

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