Supervisory control of a manufacturing system using Petri net structures

A framework for building EDM collaborative manufacturing system using multi-agent technology to support organizations characterized by physically distributed, enterprise-wide, heterogeneous intelligent manufacturing system over Internet is proposed. According to the characteristics of agile EDM collaborative manufacturing system(AEDMCMS), the agent technology is combined with Petri net in order to analyze the model. Based on the basic Petri Net, the definition is extended and the Agent-oriented Petri net (APN) is proposed. AEDMCM is turned into the model of Petri Net which is suitable to the analysis and optimization of manufacturing processes.

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A Novel Approach to Evaluate the Stability of Production Manufacturing System Based on Petri-Net and Analytic Hierarchy Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.605-607.336 ◽

2012 ◽

Vol 605-607 ◽

pp. 336-340

Author(s):

Hou Xing You

Keyword(s):

Analytic Hierarchy Process ◽

Petri Net ◽

Manufacturing System ◽

New Method ◽

System Stability ◽

Production Factor ◽

Analytic Hierarchy ◽

The Stability ◽

Whole Life Cycle ◽

Hierarchy Process

In the whole life cycle of production process, the stability of production manufacturing system is an important production factor. However, there were a few researches about the system stability in the past years. In this paper, for the stability of production manufacturing system, a new method is proposed based on Petri-net and analytic hierarchy process. In the proposed method, the reachability of manufacturing system is judged by using Petri-net, and the system stability is calculated by the successful probability of the key production nodes. Finally, evaluation steps of the new method are given, and the new evaluation method is applied in case study.

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Impact of Depth of Menu Hierarchy on Performance Effectiveness in a Supervisory Task: Computerized Flexible Manufacturing System

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872088502700610 ◽

1985 ◽

Vol 27 (6) ◽

pp. 713-722 ◽

Cited By ~ 25

Author(s):

Pentti Seppålå ◽

Gavriel Salvendy

Keyword(s):

Data Structure ◽

Supervisory Control ◽

Flexible Manufacturing ◽

Manufacturing System ◽

Flexible Manufacturing System ◽

Performance Effectiveness ◽

Performance Time ◽

Hierarchical Levels ◽

Parallel Mode ◽

Speed And Accuracy

The purpose of the study was to examine the effect of different menu structures on the effectiveness of supervisory control in a flexible manufacturing system. The variables evaluated included four hierarchical levels, two sizes of database, two work methods, and four distances between the items in the data structure. The results indicated that both performance time and errors increased as the hierarchical levels of the data structure increased. This implies that the parallel mode of data presentation is more effective than the hierarchical one. Furthermore, information that is scattered around the database should be acquired and considered simultaneously, as searching back and forth through the menu hierarchy decreases the speed and accuracy of performance.

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