한국레이저가공학회:학술대회논문집 (Proceedings of the Korean Society of Laser Processing Conference)
- 한국레이저가공학회 2006년도 춘계학술발표대회 논문집
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- Pages.89-96
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- 2006
PID 제어기법을 이용한 펄스 레이저 출력 안정화에 관한 연구
Pulse Laser Power Stabilization Using PID Control Method
- 류훈철 (연세대학교 기계공학과 대학원) ;
- 곽승우 (연세대학교 기계공학과 대학원) ;
- 강동원 (연세대학교 기계공학부) ;
- 김경식 (연세대학교 기계공학부) ;
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한재원
(연세대학교 기계공학부)
- Ryu, Hoon-Chul (Graduate School of Department of Mechanical Engineering, Yonsei University) ;
- Kwak, Seung-Woo (Graduate School of Department of Mechanical Engineering, Yonsei University) ;
- Kang, Dong-Won (Department of Mechanical Engineering, Yonsei University) ;
- Kim, Kyoung-Sik (Department of Mechanical Engineering, Yonsei University) ;
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Hahn, Jae-Won
(Department of Mechanical Engineering, Yonsei University)
- 발행 : 2006.06.02
초록
In this study, PID control method was applied to decrease the power fluctuation of the pulse laser which is one of the major processing variables in laser machining process. To stabilize the power fluctuation of the pulse laser, we averaged 10 pulse outputs of Nd:YAG laser operating in 10Hz using boxcar averager, and with taking this averaged output as an input signal, we conducted PID control using optical attenuator which is consisted of half wave plate attached on the stepping motor and polarizer. When PID control was not enabled, the power fluctuation was 4.71% and with PID control, the power fluctuation was 1.86% for 2 hours and 1 hour respectively. As a result, we stabilized the power fluctuation of the pulse laser by 60.5%
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