The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON SYSTEMS
Transactions ID Number: 29-363
Full Name: Chingyei Chung
Position: Professor
Age: ON
Sex: Male
Address: No. 1, Hsin Hsin Rd., Hsinfeng, Hsinchu,
Country: TAIWAN
Tel: +886988154179
Tel prefix: +88635528464
Fax: +88635528464
E-mail address: plu_chung@yahoo.com.tw
Other E-mails: chingyei@must.edu.tw
Title of the Paper: Modeling and Control of Die-sinking EDM
Authors as they appear in the Paper: Chingyei Chung, Shou-Yen Chao and M. F. Lu
Email addresses of all the authors: plu_chung@yahoo.com.tw, shouyen@must.edu.tw, mflu@must.edu.tw
Number of paper pages: 11
Abstract: This paper explores the mathematical model for electrically discharged machining (EDM) machine. Conventionally, it is known that the machining efficiency of EDM is closed related to the so-called ignition delay time. Here, it can be observed that the ignition delay time is the RC time-constant of the circuit model of Die-sinking EDM. Then, it can be shown that ignition delay time is closed related to the gap resistance. According to electromagnetic theory, it can be shown that in the first and middle stages of machining process, the overall control system becomes a nonlinear Lur¡¦e system. As for the final stage of machining process, the overall control system becomes a linear system. For the Lur¡¦e problem of Die-sinking EDM, we applied the SPR (Strict Positive Real) condition for the control of EDM. A differential-PID controller is proposed in the beginning and middle stage of machining process. In the final stage of machining process, A PID controller can appl!
ied to the final stage of machining process. An adaptive controller switch from Differential-PID (DPID) controller and PID controller is proposed in this paper. Experimental results will be verified. Especially, the machining efficiency can be enhanced up to 33% compared to the conventional optimal PID controller.
Keywords: Nonlinear Control System, Lur¡¦e Problem, EDM, Differential-PID Controller
EXTENSION of the file: .doc
Special (Invited) Session: Modeling and Control of Die-sinking EDM
Organizer of the Session: 613-531
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