سیستم برنامه ریزی عملیات به کمک کامپیوتر مبتنی بر دانش شی گرا برای تولید صفحات مدار لخت
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|27047||2001||17 صفحه PDF||سفارش دهید||5216 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Computers in Industry, Volume 45, Issue 2, June 2001, Pages 137–153
The manufacturing industry is time, quality and information driven. In the current highly competitive international marketplace, these factors are especially crucial to the electronics industry. In this paper, an object-oriented model of a computer-aided process planning (CAPP) system for the manufacturing of bare circuit boards is proposed. Process constraints and planning knowledge are all represented and modelled by respective constraints objects. The system is then implemented for the automatic process planning of double-sided circuit boards. The performance of the system is then compared with that of experienced process planners. The advantages in the use of the constraint and knowledge objects approach in a computer-aided process planning system are revealed.
Over the years, there have been numerous efforts directed toward the development of computer-aided process planning systems. With the rapid introduction of new products in the globalised and highly competitive market, the need for fast product development and short manufacturing turnover time is great. The development and inception of electronic products are thus time, quality and information driven  and . This is especially important in the manufacturing of printed circuit boards (PCBs), which is one of the crucial components of electronic products. This paper presents the efforts to model and implement a computer-aided process planning (CAPP) system based on an object-oriented modelling approach. First, process planning and computer-aided process planning are examined. Then an object-oriented approach based on an object modelling technique (OMT) is used to model a PCB process planning system. Next, the object model, the dynamic model and the functional model of the system are presented and described. The OMT representations of the problem constraints and knowledge are then illustrated. The hardware and software implementations of the system are then explained. The paper concludes with a discussion of how the system is evaluated and the performance of the system is compared with those of experienced process planners.
نتیجه گیری انگلیسی
This paper has demonstrated the effects of applying the OO methodology to model a CAPP system, the planning knowledge and the problem constraints. This experience shows that implementation of an object model system by an object-oriented shell is almost a direct mapping. In addition, the research has demonstrated the development of a solution to the problem of structuring planning knowledge, problem constraints and resource constraints. Evaluation shows that more consistent planning solutions are provided by the system. The research has also found that the system can generate solutions faster for inexperienced planners. Experience has shown that the CAPP system can successfully lower the required skill level of process planning activity and reduce the time required in the training of process planners. As a result, the knowledge and skill level required of the process planner can be minimised.