Wednesday, September 3, 2008

EDM controller

EDM process is very unstable, especially when working in fine regime. Often surface damage occurs by arc discharging. Unstable working is unavoidable, so the process is forced to work in liable, but effective region of working. The process is run by operator who overlook it and make a feedback control. Automation of process is the final goal of our research.

A strategy of controlling is a very important part of stable EDM action. It is complex and operator can master it after a long period of learning and collecting his own experience. Operator's knowledge and technological knowledge together with technological receipts can be added to adaptive controller which must be able to accept both of them. We are working on development of such a controller (Fig.). All basic function of controller (identification, reasoning and control) are computer made. Identification of process is well done by computer. The same is with reasoning, based on qualitative and probability assessment, which is usually reserved for human. Operator-to-computer communication is possible and controller can be improved. While the split between human way of reasoning and reasoning algorithms, a strategy of controller is developed by artificial intelligence (learning by example). Method FORS (First Order Regression System) is used. Rules IF-THEN-ELSE can be obtain by human demonstration of process leading. By this method, operator knowledge is transformed to algorithm used by computer. Rules IF-THEN-ELSE are human understandable, too.

Figure: Adaptive control system for EDM process control





1 comment:

Shenzhen Chongsheng Electronics Co., Ltd said...

Thanks for the links ! ! !
http://377704497.blogspot.com/
http://chinaglobaltrader.blogspot.com/
http://chinaimportexport.wikispaces.com/
http://made-in-china.wikispaces.com/
Business/Wholesale & Retail Trade
Retail is the process of routinely selling goods to consumers. The retail trade is
the collective description of all who practice retail. Clothing,
accessory, and general merchandise stores are some of the most
visited
establishments in the world. Whether shopping for an item of clothing
or piece of jewelry, a household appliance, or even food, one will
likely go to one of these stores to either make a purchase or compare
selections with other retail outlets. Some general merchandise stores
may sell a wide variety of items in their stores.
http://chinaglobaltrader.blogspot.com/ Importer,exporter,dealer and stocklist of electronic components
consisting of integrated circuits,transistors,electrolytic capacitors.
http://topmobilephonestore.wikispaces.com/ Retailer and wholesaler of mobile phones and Bluetooth headsets.
http://chinaimportexport.wikispaces.com/ Distributor of electronic components including semiconductors,
integrated circuits, connectors, capacitors, diodes and transistors.
Specializes in obsolete ICs and hard-to-find parts. Online searching,
web site registration and watch service.
http://importexportchina.wikispaces.com/ Importer,exporter,dealer and stocklist of electronic components
consisting of integrated circuits,transistors,electrolytic capacitors.
http://communicationtrade.wikispaces.com/ Importer,exporter,dealer and stocklist of electronic components
consisting of integrated circuits,transistors,electrolytic
capacitors.
http://importexportchina.wikispaces.com/ Distributor of new and
obsolete semiconductors, integrated circuits, passive and discrete
parts. Online line card part search.
http://made-in-china.wikispaces.com/ Distributor of electronic components including semiconductors,
integrated circuits, connectors, capacitors, diodes and transistors.
Specializes in obsolete ICs and hard-to-find parts. Online searching,
web site registration and watch service.
http://377704497.blogspot.com/ Importer,exporter,dealer and stocklist of electronic components
consisting of integrated circuits,transistors,electrolytic capacitors.