Design of a Fuzzy Controller for the Adaptive control of WEDM Process
Resource
International Journal of Machine Tools and Manufacture 40 (15): 2293-2307
Journal
International Journal of Machine Tools and Manufacture
Journal Volume
40
Journal Issue
15
Pages
2293-2307
Date Issued
2000
Date
2000
Author(s)
Liao, Y.S.
Woo, J.C.
Abstract
This paper addresses the design of a fuzzy controller for the control of the wire electrical discharge machining (WEDM) process. The power consumption and short circuit ratio are chosen as control parameters. Incorporated with pulse trains analysis and experience, fuzzy rules for the control of the WEDM process are formulated. A DSP-based on-line pulse monitoring system is developed, and the fuzzy control system is implemented on a PC-486. In the developed control system, a reference power level is specified beforehand, and feed is adjusted according to the computed actual machining power. Off time is regulated automatically so that short circuit ratio will not exceed a specific value. Fine tuning of feed and pulse off-time is conducted if the variation in the average ignition delay time is too large. Experiments show that the developed control strategy results in very satisfactory transient and steady state responses as compared with a conventional control scheme.
Other Subjects
Control system analysis; Control system synthesis; Fuzzy control; Process control; Wire electrical discharge machining (WEDM) process; Machining
Type
journal article
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