Process Control for Medfly Mass Production at San Miguel Petapa, Guatemala: A System Approach

Fruit Flies ◽  
1993 ◽  
pp. 289-294 ◽  
Author(s):  
N. Bruzzone ◽  
C. Caceres ◽  
L. Andrade ◽  
N. Guzman ◽  
J. Calderon ◽  
...  
Keyword(s):  
Process Control ◽  
Mass Production ◽  
System Approach

Automatic Process Control in Press Shops

2007 ◽  
Vol 344 ◽  
pp. 881-888 ◽  
Author(s):  
Hartmut Hoffmann ◽  
Michael F. Zäh ◽  
Ingo Faass ◽  
Roland Mork ◽  
Matthias Golle ◽  
...  
Keyword(s):  
Process Control ◽  
Mass Production ◽  
Sensor Data ◽  
Production Cycle ◽  
Automatic Process ◽  
Automatic Process Control ◽  
Material Quality ◽  
Factors Influencing ◽  
Body Components ◽  
Component Quality

The manufacturing of automotive body components in press lines is a sensitive process. The quality characteristics of body components vary. These fluctuations are rooted in the fact that the factors influencing the component quality are varying, e.g., fluctuations of batches regarding material quality, abrasion or heating of the tool during the production cycle. If a certain quality characteristic exceeds a predefined range an intervention in the process is necessary. This intervention is based upon the subjective know-how of the machine operator. Objective information about the state of the process, like tool temperature or the material quality of the semi-finished product is not available. Therefore, a lack of knowledge emerges in the interrelations between the tuning parameters of the system press-tool and the component quality during different stages of the process (material quality, temperature…). In this paper a complete concept for an automatic process control in press shops is described. The concept will be realized in a pilot plant for mass production in the press shop of AUDI AG. The mechanisms of occurrence of quality defects are shown in the paper, as well as the essential factors influencing the quality during the mass production of body components in the automotive industry and their variation. A sensor-system for continuous measurement of influencing variables during the mass production is presented. The key element of the concept is the non-destructive identification of material-properties for every single blank. By associating the sensor-data with the respective quality, a knowledge-based process control can be realized. The purpose is to create a failure prediction algorithm and make optimal adjustments for each stroke of the moulding press, respectively. The potential of existing actuators in modern press lines as well as new, tool integrated proposals for actuators are highlighted.

scholarly journals PID Testing Method Suitable for Process Control of Solar Cells Mass Production

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Xianfang Gou ◽  
Xiaoyan Li ◽  
Su Zhou ◽  
Shaoliang Wang ◽  
Weitao Fan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Solar Cells ◽  
Process Control ◽  
Mass Production ◽  
Test Procedure ◽  
Quality Inspection ◽  
Test Results ◽  
Power Losses ◽  
Monitoring Method ◽  
Testing Method

Voltage bias of several hundred volts which are applied between solar cells and module frames may lead to significant power losses, so-called potential-induced degradation (PID), in normal photovoltaic (PV) installations system. Modules and minimodules are used to conduct PID test of solar cells. The test procedure is time consuming and of high cost, which cannot be used as process monitoring method during solar cells fabrication. In this paper, three kinds of test including minimodule,Rsh, and V-Q test are conducted on solar cells or wafers with SiNxof different refractive index. All comparisons between test results ofRsh, V-Q, and minimodule tests have shown equal results. It is shown thatRshtest can be used as quality inspection of solar cells and V-Q test of coated wafer can be used as process control of solar cells.

Hot-Embossing of Microstructures on Large Area of Polymers

2010 ◽  
Vol 447-448 ◽  
pp. 483-487 ◽  
Author(s):  
Wei Lin ◽  
Wen Jie Chen ◽  
Choon Meng Kiew ◽  
Chuen Leong Ng ◽  
Hong Luo ◽  
...  
Keyword(s):  
Process Control ◽  
Temperature Control ◽  
Mass Production ◽  
Hot Embossing ◽  
Machine Design ◽  
Large Area ◽  
Pmma Sheet ◽  
Linear Dimensions ◽  
Alignment Mechanism

This paper addresses the limitations of current hot embossing machines for mass production applications. It describes the features of a hot embossing machine in terms of machine design for handling large surfaces, embossing head for fast and precise temperature control, and the alignment mechanism for controlling the residual uniformity and planar offsets for producing microstructures uniformly on large area by means of step-and-repeat method. The developed machine demonstrated that microstructures of features size of up to 100µm could be replicated in 250s on PMMA sheet with an electroplated nickel stamp. The linear dimensions of the embossed features however were generally smaller than those in the stamp, which highlighted the importance of precision process control.

scholarly journals Justification of the concept of development of modern organic agriculture on the basis of biointensive technologies

2021 ◽  
Vol 101 ◽  
pp. 02031
Author(s):  
V.A. Kundius
Keyword(s):  
Process Control ◽  
Russian Federation ◽  
Organic Agriculture ◽  
Rural Areas ◽  
System Approach ◽  
Biological Function ◽  
Integrated System ◽  
Project Development ◽  
Cluster Approach ◽  
The Russian Federation

The article presents the results of research on the project "Development of organic agriculture based on advanced methods and technologies", with its integrated system approach, models of market organisation, process control of biological function and development of rural areas. The article substantiates the need to develop the concept and programs of organic agriculture in the regions of the Russian Federation in relation to the Altai Territory on the basis of a cluster approach with the development of biointensive technologies, mechanisms and methods of its development.

Energy, transport, and consumption in the Industrial Revolution

2019 ◽  
Vol 42 ◽  
Author(s):  
Joseph A. Tainter ◽  
Temis G. Taylor
Keyword(s):  
Mass Production ◽  
Industrial Revolution ◽  
Energy Transport ◽  
Underlying Assumption

Abstract We question Baumard's underlying assumption that humans have a propensity to innovate. Affordable transportation and energy underpinned the Industrial Revolution, making mass production/consumption possible. Although we cannot accept Baumard's thesis on the Industrial Revolution, it may help explain why complexity and innovation increase rapidly in the context of abundant energy.

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