scholarly journals Modelling of Mechanisms as a Methodological Tool (the Case of Designing a Cycloidal Pin Transmission)

2022 ◽  
Vol 19 (4) ◽  
pp. 40-46
Author(s):  
M. V. Stekolnikov ◽  
L. R. Milovanova ◽  
I. A. Chelysheva
Keyword(s):  
Technology Development ◽  
Computational Design ◽  
Simulation Modelling ◽  
Design System ◽  
Software Systems ◽  
Modern Approach ◽  
Methodological Tool ◽  
Modern Level ◽  
High Degree ◽  
Modelling Data

The suggested modern approach to modelling of objects and systems allows not only to create models but also to use them to study the main properties of the object (system) with a high degree of clarity and adequacy, as well as to develop most important skills of young engineers in creating and implementing digital models of engineering objects.The objective of the study is to analyse capacity of one of the modern automated computational design systems as a methodological tool.The functionality of an automated computational design system is considered for the case of constructing a model of a planetary cycloidal pinion transmission. The resulting model allows visualising the kinematics of the designed mechanism in the form of static or moving graphic images. The model built based on the described approach contains digital images of mechanism parts, which can be transferred without modification to specialised software systems for analysing strength characteristics or manufacturing material models of a product using rapid prototyping methods.The proposed approach allows to perfect actions referring to the analysis of properties and synthesis of new structures using tools that correspond to the modern level of technology development and to get a visual idea of the process of developing a machine from a mathematical model to its material objectification.The research methods are based on the fundamental principles of mathematical and simulation modelling, data analysis and processing using powerful automated computational design tools.The tools used for modelling can be used for different forms of learning, i.e., without reference to specific premises and equipment. 

A Framework for Component Layout and Geometry Design of Mechanical Systems: Configuration Network and its Viewing Control

1995 ◽  
Author(s):  
Kikuo Fujita ◽  
Shinsuke Akagi
Keyword(s):  
Design Method ◽  
Mechanical Systems ◽  
Optimization Procedure ◽  
Computational Design ◽  
Object Oriented Programming ◽  
Design System ◽  
Air Conditioner ◽  
Programming Technique ◽  
Geometry Design ◽  
Component Layout

Abstract A Framework of computational design method and model is proposed for layout and geometry design of complicated mechanical systems, which is named “configuration network and its viewing control”. In the method, a design object is represented with a set of declarative relationships among various elements of a system, that is, configurations, which is gradually extended from schematic structure to exact layout and geometry through design process. Since a whole of such configurations forms a too complicated network to compute all together, how to view subparts is controlled based on levels of granularity and width of scope range. Such a configuration network is made to grow and refined through embodying geometry and layout corresponding to a focused subpart with a numerical optimization procedure. The framework has also an ability to flexibly integrate with engineering analysis. Moreover, a design system is implemented with an object-oriented programming technique, and it is applied to a design problem of air conditioner units in order to show the validity and effectiveness of the framework.

A Systematic Computational Design System for Turbine Cascades, Airfoil Geometry and Blade-to-Blade Analysis

1983 ◽  
Author(s):  
Z.-Q. Ye
Keyword(s):  
Boundary Layer ◽  
Leading Edge ◽  
Computational Design ◽  
Design System ◽  
Finite Area ◽  
Streamline Curvature ◽  
Boundary Layer Analysis ◽  
Curvature Analysis ◽  
Layer Analysis ◽  
Turbine Cascades

This paper describes a systematic computational design system for two-dimensional turbine cascades. The system includes a sequence of calculations in which airfoil profiles are designed from velocity diagram requirements and specified geometric parameters, followed by an inviscid global streamline curvature analysis, a magnified reanalysis around the leading edge, and a transitional profile boundary layer and wake mixing analysis. A finite area technique and a body-fitted mesh are used for the reanalysis. The boundary layer analysis is performed using the dissipation-integral method of Walz which has been modified in the present application. Several turbine airfoil profile geometry designs are presented. Also two sample cascade design cases and their calculated performance for a range of Mach numbers and incidence angles are given and discussed.

Network Equipment Selection Scheme of University Informatization Construction

2014 ◽  
Vol 599-601 ◽  
pp. 1575-1579
Author(s):  
Fang Fang ◽  
Xin Ge Luo
Keyword(s):  
Information Technology ◽  
Technology Development ◽  
Design System ◽  
Network System ◽  
Campus Network ◽  
Selection Scheme ◽  
Teaching And Research ◽  
Starting Point ◽  
Network Equipment ◽  
Information Technology Development

With teaching and research of campus reliance on information technology is growing; the campus information technology development is also increasingly rapidly. Information system of campus should adapt to the campus’s long-term development plan, considering the economic conditions of campus to meet the needs of teaching and research as the fundamental starting point. Network system is the support platform of information technology. The selection of equipments is an important part of network system planning, including routers, switches, servers and other network security products, and so on. This paper described the three-layer design system. Each layer has different requirements for routers and switches. Based on the classification and the performance analysis of main network devices, this paper presented the principles and programs of the campus network construction in the purchase of network equipment should be followed.

A Systematic Computational Design System for Turbine Cascades, Airfoil Geometry, and Blade-to-Blade Analysis

1984 ◽  
Vol 106 (3) ◽  
pp. 598-605 ◽  
Author(s):  
Z.-Q. Ye
Keyword(s):  
Boundary Layer ◽  
Leading Edge ◽  
Computational Design ◽  
Design System ◽  
Finite Area ◽  
Streamline Curvature ◽  
Boundary Layer Analysis ◽  
Curvature Analysis ◽  
Layer Analysis ◽  
Turbine Cascades

This paper describes a systematic computational design system for two-dimensional turbine cascades. The system includes a sequence of calculations in which airfoil profiles are designed from velocity diagram requirements and specified geometric parameters, followed by an inviscid global streamline curvature analysis, a magnified reanalysis around the leading edge, and a transitional profile boundary layer and wake mixing analysis. A finite area technique and a body-fitted mesh are used for the reanalysis. The boundary layer analysis is performed using the dissipation-integral method of Walz which has been modified in the present application. Several turbine airfoil profile geometry designs are presented. Also two sample cascade design cases and their calculated performance for a range of Mach numbers and incidence angles are given and discussed.

scholarly journals Simulación de la dinámica de un secador solar usando la teoría del caos

2017 ◽  
Vol 2 (1) ◽  
pp. 17
Author(s):  
Arquímides Haro Velasteguí ◽  
Yolanda Llosas Albuerne ◽  
Maria Fernández
Keyword(s):  
Developing Countries ◽  
Chaos Theory ◽  
Technology Development ◽  
Solar Drying ◽  
Alternative Technologies ◽  
Index Terms ◽  
Drying Model ◽  
And Control ◽  
High Degree ◽  
Or Applications

The simulation is a technique that represents a system, It allows to diagnose its operation, help establish its behavior and control their possible variations, why has become a very important tool in technology development, saving money, time and work. Despite the advantages, there are systems that are extremely difficult to simulate, since its complexity and unpredictability in time is very large, especially those associated with environmental conditions as in the case of solar drying is subject to variables weather, although it is designed properly functioning models regarding the efficiency obtained, but little has been done to improve it, given the development of alternative technologies or applications that have been given to it. In this framework and in order to contribute to the improvement of this type of technology that can be easily adopted by developing countries, with which they can make much better use their natural resources and knowledge, without major technological investment and high degree of accuracy, the present investigation is proposed to apply the Chaos Theory applies as operating base  of a solar drying  model in conditions of the Ecuadorian Highlands Index Terms— Secador solar, modelo matemático, teoría del caos, modelo de simulación, energía solar, altiplano Ecuatoriano.

scholarly journals Therapeutic and diagnostic enteroscopy in children: 15 years of experience

2020 ◽  
pp. 102-110
Author(s):  
E. V. Kirakosyan ◽  
M. M. Lokhmatov
Keyword(s):  
Full Range ◽  
High Definition ◽  
Double Balloon Enteroscopy ◽  
Modern Approach ◽  
Sophisticated Equipment ◽  
Modern Level ◽  
Definition Of ◽  
Diagnostic Capabilities ◽  
New Generation ◽  
Digital Or

Each new stage in the development of endoscopy was characterized by the creation of more sophisticated equipment and the expansion of diagnostic capabilities. The 21st century was marked by the transition to robotic remotely controlled endoscopic systems, the use of digital or electronic endoscopic technology in children. The modern level of endoscopy in pediatrics includes a high definition of the image obtained, a morphological study of biopsy specimens and a full range of endosurgical procedures. The paper presents the experience of introducing, teaching, preparing, conducting, analyzing and evaluating the results, features and nuances of use in children of therapeutic and diagnostic enteroscopy of a new generation: video capsule endoscopy and double-balloon enteroscopy. The modern approach to intraluminal diagnosis and endoscopic treatment of children with digestive system pathologies is substantiated.

The Management of Information Flow in a High Technology Development Environment

1979 ◽  
Vol 193 (1) ◽  
pp. 61-67 ◽  
Author(s):  
D. S. Pearson
Keyword(s):  
Performance Monitoring ◽  
Technology Development ◽  
Experimental Methods ◽  
Simulation Modelling ◽  
Development Programme ◽  
Effective Management ◽  
Development Environment ◽  
Commercial Airline ◽  
Original Field ◽  
And Performance

Effective management of a gas turbine development programme under commercial airline pressures demands very careful balancing of two separate cycling commodities. One is experimental engines and component parts or ‘hardware’. The other is data, information and conclusions, hereafter referred to collectively as ‘decisionware’. While techniques for hardware management are well documented, equivalent techniques for planning, monitoring and motivating decisionware activities are less developed. This paper describes experimental methods which have been evolved, and applied to some development activities within the Derby Engine Group of Rolls-Royce Limited. These methods include simulation modelling and performance monitoring of a staff organization and aim to achieve higher combined effectiveness of the two meshing cycles described. The work occupied a period of one man year and has applications in development associated departments outside the original field of study.

Government involvement in environmental technology development: a critical analysis

1996 ◽  
Vol 23 (2) ◽  
pp. 111-114 ◽  
Author(s):  
Marc E. Norman
Keyword(s):  
Technology Development ◽  
Theoretical Background ◽  
Market Failures ◽  
Market Uncertainty ◽  
Environmental Technology ◽  
Role Of Government ◽  
Proper Role ◽  
Government Involvement ◽  
Environmental Technologies ◽  
High Degree

SummaryThis paper analyzes the justifications for governmental involvement in the development and commercialization of environmental technologies. To do so, a list of ‘generic’ rationales for government R&D involvement is extracted from various literature sources. Each rationale is discussed theoretically, and then analyzed in terms of its possible application to the environmental field. The intended contribution of the paper is to provide a theoretical background concerning the proper role of government in the development of environmental technologies. By determining the circumstances under which government involvement is justified, the groundwork is laid for the development of appropriate governmental policies.The paper argues that there are several salient features of the environmental field which may justify governmental involvement. The increasingly high degree of environmental regulation has already caused indirect market failures that hinder private R&D efforts. Potential technologies to counter environmental externalities represent public goods which have social benefits for which there are no incentives in the private market. Uncertainty due both to our lack of understanding of the complexities of the natural environment and to shifting environmental regulations and policies may cause a risk aversion in the private sector against developing technologies. Imperfect public knowledge concerning environmental issues leads to less than optimal demand for new environmental technologies. All of these features generate market distortions which cause private R&D to deviate from what is socially optimal. As a result, governmental involvement in environmental technology development may well be warranted.

Conflict management and performance of information technology development teams

2016 ◽  
Vol 22 (5/6) ◽  
pp. 242-256 ◽  
Author(s):  
Dmitriy Nesterkin ◽  
Tobin Porterfield
Keyword(s):  
Conflict Management ◽  
Team Performance ◽  
Structural Equation ◽  
Technology Development ◽  
Team Cohesion ◽  
Software Systems ◽  
Negative Effects ◽  
Content Type ◽  
Team Members ◽  
Team Productivity

Purpose This research aims to investigate how team support and cohesion channel the effects of relationship conflict and its management on team productivity. Design/methodology/approach Questionnaire data were sampled from students working in groups to design software systems for companies. Structural equation methodology was used to estimate the proposed model. Findings The results indicate that the mediators (team support and cohesion) positively affect each other and team performance. The results support that the effects of conflict and conflict management on team performance are mediated by team support first and then indirectly through team cohesion. Research limitations/implications This paper empirically establishes the mechanisms through which conflict and its management affect team performance. The following limitations should be considered when generalizing the results of the study: team-level phenomena were assessed using perceived measures of individual team members and an academic setting was used for data collection. Practical implications The findings indicate that team support plays an important role in protecting the team from the negative effects of conflict and that team support contributes to the development of team cohesion. Originality/value This work is one of the first to evaluate the mechanisms of team support and cohesion through which team conflict and its management affect team performance.

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