Automatic Derivation of Geometric Properties of Components From 3D Polygon Models

2017 ◽  
Author(s):  
Sascha Brandt ◽  
Matthias Fischer ◽  
Maria Gerges ◽  
Claudius Jähn ◽  
Jan Berssenbrügge
Keyword(s):  
Relevant Information ◽  
Transport Systems ◽  
Material Transport ◽  
Virtual Design ◽  
Geometrical Properties ◽  
Rotation Axes ◽  
Space Rotation ◽  
Triangulated Surfaces ◽  
Conveyor Belts ◽  
Limited Input Data

To detect errors or find potential for improvement during the CAD-supported development of a complex technical system like modern industrial machines, the system’s virtual prototype can be examined in virtual reality (VR) in the context of virtual design reviews. Besides exploring the static shape of the examined system, observing the machines’ mechanics (e.g., motor-driven mechanisms) and transport routes for the material transport (e.g., via conveyor belts or chains, or rail-based transport systems) can play an equally important role in such a review. In practice it is often the case, that the relevant information about transport routes, or kinematic properties is either not consequently modeled in the CAD data or is lost during conversion processes. To significantly reduce the manual effort and costs for creating animations of the machines complex behavior with such limited input data for a design review, we present a set of algorithms to automatically determine geometrical properties of machine parts based only on their triangulated surfaces. The algorithms allow to detect the course of transport systems, the orientation of objects in 3d space, rotation axes of cylindrical objects and holes, the number of tooth of gears, as well as the tooth spacing of toothed racks. We implemented the algorithms in the VR system PADrend and applied them to animate virtual prototypes of real machines.

scholarly journals Karakter Perakaran Sejumlah Varietas Kopi Arabika pada Fase Bibit di Pesemaian

2021 ◽  
Vol 5 (1) ◽  
pp. 18-25
Author(s):  
Ari Wibowo
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Lateral Roots ◽  
Dry Weight ◽  
Transport Systems ◽  
Material Transport ◽  
Root Characteristics ◽  
Arabica Coffee ◽  
Randomized Design ◽  
Adaptation Processes

Roots represent the fundamental structure and material transport systems in plants. These important organs are used to study the adaptation processes in the environment. During the nursery stage, root evaluation serves as determining the seedling quality before transplant. This research aims to ascertain the root characteristics of several Arabica coffee varieties for a suitably vigorous root nursery system. Kaliwining Experimental Garden, Jember, Indonesia, served as the research location. The method used was a completely randomized design with a single factor, including arabica coffee varieties (Abesinia-3, Andungsari-1, BLP-4, Gayo-1, K-08, K-29, K-34, K-79, K-130, Kartika-1, Kayumas and Sigararutang). The result showed that the differences in the various sample factors significantly influenced the root properties. In addition, the entire observation parameters demonstrated a positive correlation except for the root and shoot ratio. Furthermore, BLP-4 v obtained the maximum values for plant height, stem diameter, fresh dry weight of taproot, and root biomass, while Gayo-1 variety observed the greatest number of leaves. Also, the Sigararutang variety indicated the highest value of the fresh and dry weight of shoot, fresh weight of lateral roots, and root length, while Kayumas and K-34 varieties acquired the lowest values of plant height, fresh and dry weight of shoot and root, as well as root length. Therefore, BLP-4, Gayo-1, and Sigararutang varieties exhibited the potentials of broader adaptability.

scholarly journals FEATURES OF LOGISTICS OF THE TERTIARY SECTOR OF ECONOMICS

2017 ◽  
pp. 132-136
Author(s):  
Elvira Revovna Arslanova ◽  
Olga Nikolaevna Lipatova ◽  
Elina Victorovna Polyanskaya
Keyword(s):  
Business Processes ◽  
Relevant Information ◽  
Financial Information ◽  
Economic Systems ◽  
Material Transport ◽  
Tertiary Sector ◽  
Financial Flows ◽  
Efficient Management ◽  
Tourism Product ◽  
National Economic

The tertiary sector of economics in the current economic environment ranks first in the national economic systems by the number of the employed population. At the same time the rapidly changing market environment requires new tools for efficient management of business processes. In this regard, the logistics tools enabling optimization of material, transport, financial flows is a factor increasing activity of economic entities. Studying the possibility of applying logistics principles to the flows organization in tourism has led to the conclusion about expediency of application of logistics tools in activity of service rendering enterprises, subject to specific features of services as commodity items. Studying the possibility of applying logistics principles to the flows organization in tourism has led to the conclusion about expediency of application of logistics tools in activity of service rendering enterprises, subject to specific features of services as commodity items, and helped to determine tourism logistics as a type of business which involves planning, managing and controlling the flows (material, service, financial, information, etc.) in the process of formation of the tour, bringing the tourism product to the consumer, as well as storage, transmission and processing of relevant information.

scholarly journals Spatial Distributions of 226Ra and 228Ra in the Indian and Southern Oceans in 2020 and Their Implications for Unique Currents

2021 ◽  
Author(s):  
Mutsuo Inoue ◽  
Shotaro Hanaki ◽  
Hiroaki Kameyama ◽  
Yuichiro Kumamoto ◽  
Seiya Nagao
Keyword(s):  
Indian Ocean ◽  
Southern Ocean ◽  
Western Indian Ocean ◽  
Polar Front ◽  
Transport Systems ◽  
Material Transport ◽  
Vertical Variations ◽  
Circumpolar Current ◽  
The Antarctic ◽  
Southern Oceans

Abstract We examined the spatial variations in 226Ra and 228Ra concentrations from the surface to a depth of 830 m in the Indian and Southern Oceans during December 2019–January 2020. Notably, 226Ra concentrations at the surface increased sharply from 30°S to 60°S along an ~55°E transect (1.4 to 2.9 mBq/L), exhibiting small vertical variations, while 228Ra became depleted, particularly in the Southern Ocean. These distributions indicated the ocean-scale northward lateral movements of 226Ra-rich and 228Ra-depleted currents originating from the Antarctic Circumpolar Current (ACC). Using 226Ra concentrations, the fractions of the ACC at depths of 0–800 m were estimated to decrease from 0.95 to 0.14 from 60°S to 30°S through 0.56 at 43°S. The fractions in the subantarctic area the western Indian Ocean were higher than those previously reported from the eastern, indicating the preferential transport of the ACC. The fractions obtained were approximately equivalent to those in the western Indian section in the 1970s. This could be attributed to the minimal effects of the southward shift of the polar front due to global warming over the last 40 y, implying no notable changes in soluble material transport systems from the Southern Ocean to southern Indian Ocean.

scholarly journals Energy calculation model of an outgoing conveyor with application of a transfer chute with the damping plate

2016 ◽  
Vol 7 (2) ◽  
pp. 167-177 ◽  
Author(s):  
Vieroslav Molnár ◽  
Gabriel Fedorko ◽  
Nikoleta Husáková ◽  
Ján Král' Jr. ◽  
Mirosław Ferdynus
Keyword(s):  
Simulation Models ◽  
Calculation Model ◽  
Computing Methods ◽  
Transport Systems ◽  
Transfer Model ◽  
Energy Calculation ◽  
Efficient Operation ◽  
Analytical Simulation ◽  
Conveyor Belts ◽  
Belt Conveyors

Abstract. The energy efficiency of transport systems consisting of several belt conveyors is significantly affected by re-direction. The proper sizing of several conveyor belts using deflector plates can significantly affect their efficiency. At present, there are no uniform rules (models) which specify the methodology and procedures for their design. This paper brings proposals of design of optimal parameters for energy-efficient operation of the transport system consisting of belt conveyors based on the new analytical simulation models. Recommendations for the practical application of transport systems at the transfer point have been designed according to optimization. The results are analysed in detail in three phases of shifting by means of a physical approach with the support of computing methods and simulation experiments with the transfer model. We can state that the direction and orientation of material impact have a direct influence on the conveyor's energy intensity. Thus, the inevitable condition for operation of arbitrary type of belt conveyor is to pay greater attention to the construction of the transfer model, particularly the intensity of the energy of the outgoing conveyor.

scholarly journals Fault-Tolerant Multi-Robot Operational Strategy for Material Transport Systems Considering Maintenance Activity

2010 ◽  
Vol 22 (4) ◽  
pp. 485-495 ◽  
Author(s):  
Satoshi Hoshino ◽  
◽  
Hiroya Seki ◽  
Yuji Naka ◽  
Jun Ota ◽  
...  
Keyword(s):  
Fault Tolerant ◽  
Industrial Applications ◽  
Transport Systems ◽  
Reliability Engineering ◽  
Material Transport ◽  
Corrective Maintenance ◽  
Operational Strategies ◽  
Maintenance Activity ◽  
Robot Systems ◽  
Multi Robot

In automated robotic systems, a robot undergoing corrective maintenance (i.e., repair) or preventive maintenance (i.e., inspection) may become a disturbance of operations for other working robots. Therefore, maintenance of a robot has to be performed adequately. Multi-robot systems have the capability for the substitution and complement of such a robot. To introduce the multi-robot technology in industrial applications, we propose fault-tolerant multi-robot operational strategies for a material transport system focusing on the robot behavior. Working robots, while switching between normal and fault-tolerant operational strategies reactively according to the presence or absence of a robot undergoing maintenance, accomplish tasks. Through simulation experiments, the effectiveness of the proposed strategies is discussed. In addition, an integrated strategy for some failure rates of the robot is investigated. Finally, a maintenance activity for the robots is modeled on the basis of reliability engineering and the reasonability of preventive and corrective maintenance is discussed.

scholarly journals Industry 4.0 and Smart Data as Enablers of the Circular Economy in Manufacturing: Product Re-Engineering with Circular Eco-Design

2021 ◽  
Vol 13 (18) ◽  
pp. 10366
Author(s):  
Marco Vacchi ◽  
Cristina Siligardi ◽  
Erika Iveth Cedillo-González ◽  
Anna Maria Ferrari ◽  
Davide Settembre-Blundo
Keyword(s):  
Circular Economy ◽  
Industry 4.0 ◽  
Manufacturing Industry ◽  
Microstructural Analysis ◽  
Raw Material ◽  
Transport Systems ◽  
Ceramic Product ◽  
Material Transport ◽  
Life Cycle Assessment Methodology ◽  
Smart Data

The digital transformation of manufacturing firms, in addition to making operations more efficient, offers important opportunities both to promote the transition to a circular economy and to experiment with new techniques for designing smarter and greener products. This study integrates Industry 4.0 technologies, smart data, Life Cycle Assessment methodology, and material microstructural analysis techniques to develop and apply a circular eco-design model that has been implemented in the Italian ceramic tile manufacturing industry. The model has been initially adopted in a simulation environment to define five different scenarios of raw material supply, alternative to the current production one. The scenarios were then validated operationally at laboratory scale and in a pilot environment, demonstrating that a proper selection of raw material transport systems significantly improves the environmental performance of the ceramic product. Both the results of the laboratory tests and of the pre-industrial experiments have demonstrated the technological feasibility of the solutions identified with circular eco-design, enabling the re-engineering of the ceramic product as the fifth of the 6Rs of the circular economy.

Application the Renewal Theory to Determining the Models of the Optimal Lifetime for Conveyor Belts

2014 ◽  
Vol 683 ◽  
pp. 97-101
Author(s):  
Anna Grinčová ◽  
Miriam Andrejiová ◽  
Peter Grendel
Keyword(s):  
Renewal Theory ◽  
Conveyor Belt ◽  
Transport Systems ◽  
Belt Conveyor ◽  
Operation Analysis ◽  
Conveyor Belts ◽  
Belt Conveyors ◽  
High Level ◽  
The Cost ◽  
Methods Of Operation

Belt conveyance belongs to the continual transport systems characteristic with high-level conveying performances. Belt conveyors are of significant importance in the transportation of various types of materials in the industries like engineering, metallurgy and construction. The fundamental and the most expensive component of belt conveyors is the conveyor belt which is, during the operation on the belt conveyor, exposed to number of various loads that evoke the process of conveyor belt wear and damage. Lifetime of conveyor belts, which is the determining parameter for the belt conveyance economy and efficiency, is very important for the practice.Issues regarding the conveyor belt lifetime should be solved applying also the methods of operation analysis, especially the linear programming and the renewal theory that uses the theory of probability and mathematic statistics. The objective of our research was to determine the optimal lifetime (optimal performance duration) of a belt conveyor, applying the renewal theory, whereas the research was based on the cost approach of the renewal process.

CR/EPDM Blends with Steel Friction and Wear Characteristics under Dry Sliding

2013 ◽  
Vol 341-342 ◽  
pp. 291-295
Author(s):  
Lian Hua Zhao ◽  
Bao Ling Xie ◽  
Li Hua Fan
Keyword(s):  
Friction Pair ◽  
Test Results ◽  
Material Transport ◽  
Dynamic Coordination ◽  
Low Load ◽  
Conveyor Belts ◽  
Wear Friction ◽  
Reasonable Choice ◽  
Friction And Wear Characteristics ◽  
Metal Friction

CR is often used to make the foreskin material transport belts, wires, cables, and the manufacture of oil hose, gaskets, equipment and chemical resistant bushing. EPDM is often used to produce heat-resistant conveyor belts, cables, wires, anti-corrosion lining, gaskets, waterproof sheet, door and window seals, etc. The same hardness and different proportions of CR/EPDM blends with steel under dry friction pair as the research object to seek friction characteristics of different formulations of rubber with steel metal in the dynamic coordination. Friction test at a constant low load, constant temperature, the different mixing ratio of CR/EPDM blends, friction, wear, friction coefficient variation with engine speed. The test results to a reasonable choice of conveyor belts to improve the overall efficiency and life of rubber - metal friction pairs.

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