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An Improved Production Activity control Architecture for shop floor control

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Computer Aided Drafting,Design and Manufacturing 2005年第1期15卷 59-63页

作者： SHAHID Ikramullah Butt HAMID Ullah Khan Niazi School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing 100081 China.School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing 100081 China.

This paper presents a further improved Production Activity control Architecture to deal with the complexity of information by creating Sub-Producers and Sub-Movers which will not only give a better control at workstation level but also reduce load on the Dispatcher. It also makes an analysis of the basic and improved PAC (Production Activity control) Architecture in the control System for Integrated Manufacturing. The PAC Architecture and the improvement will further enhance the flexibility and adaptability of the architecture in the ever changing environment of the shop floor control (SFC) Systems.

关键词： manufacturing system shop floor control production activity control architecture type

A HOLONIC FRAMEWORK OF RECONFIGURABLE shop floor control SYSTEMS IN AUTOMATED MANUFACTURING SYSTEMS

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Transactions of Nanjing University of Aeronautics and Astronautics 1999年第1期16卷 61-69页

作者：周燕飞姬鹏华范澄冷晟南京航空航天大学机电工程学院

The agility and the flexibility of the current shop floor control systems have been limited so far, owing to the lack of structural flexibility and agility in its control software layer. Most of them are based on traditional hierarchical architecture and the top down approach and depend structurally on their specific configuration and job scheduling. Not only can they hardly satisfactorily adapt to these increasing changes and disturbances, but also make the redevelopment and maintenance of shop floor control system (SFCS) to need high cost and much time. And SFCS based on the heterarchical architecture don′t provide a predictable and high performance system, especially not in the heterogeneous environments, where the resources are scarce and the current decisions have serious repercussions on the future performances. For this reason, the heterarchical control is hardly applied in industry. Obviously, it is necessary to develop a new structural framework of reconfigurable SFCS to improve their agility, flexibility and maintainability. This paper presents a holonic framework of reconfigurable SFCS based on holonic manufacturing concepts. The framework is composed of resource holons, product holons and other staff holons. The model of each holon and the co operative mechanisms of holons are described. To verify the proposed approach experimentally, a prototype reconfigurable SFCS for a flexible manufacturing shop floor producing discrete parts is implemented.

关键词： holarchy automated manufacturing system shop floor control control system

Model of Production Planning and Scheduling in shop floor Based on Collaboration and Competition

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Wuhan University Journal of Natural Sciences 2002年第1期7卷 77-81页

作者： Liu Shi-ping Rao Yun-qing Zhang Jie Li Pei-gen Intelligent Manufacturing Laboratory School of Mechanical Sci. and Eng. Huazhong Univ. of Sci. and Technol. Wuhan 430074 Hubei China

The planning and scheduling in real shop floor is actually achieved by coordination between different persons. In this process, cooperation is mainstream, but competition also exists, for example, the competition between different groups, operators with the same skill, etc. In multi-agent based shop floor management and control system, this competition and cooperation relation must be embodied. The general process of shop floor production planning and scheduling is studied, and a colored Petri-net model for the competition and cooperation process of three main agents in such system to achieve shop floor production planning and scheduling is presented. The evaluating method of bids in bidding process that especially embodies the competition relationship is also presented. This colored Petri-net model gives a clear illustration of this complex coordination process to system designers, effectively promotes the cooperative development.

关键词： CIMS (computer integrated manufacturing system) DAI (distributed artificial intelligence) agent Petri-net shop floor control

An Improved PAC Architecture for shop floor Information System in Digital Manufacturing

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Computer Aided Drafting,Design and Manufacturing 2005年第2期15卷 56-60页

作者： SHAHID Ikramullah Butt School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing 100081 China

In order to overcome the weakness of the former production activity control （PAC） architecture, this paper presents an improved PAC architecture. The BIT-PAC architecture has been applied with the use of information technology. It facilitates the information flow from shop floor to other areas of the organization and makes the organizations more integrated and productive. This architecture also facilitates the expansion of the shop floor functions without disturbing the basic infrastructure. Effectiveness of the BIT-PAC architecture was checked by developing and running application software on a network PC which has supported the dynamic flow of information from Sub-Producers and Sub-Movers to other areas of organization.

关键词： digital manufacturing production activity control shop floor control shop floor information system.