한국생산제조학회 학술지 영문 홈페이지
[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 3, pp.163-169
ISSN: 2508-5107 (Online)
Print publication date 15 Jun 2020
Received 17 Apr 2020 Revised 11 May 2020 Accepted 20 May 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.3.163

공압 피로 시험기 구성을 위한 공압실린더의 고속/고정밀 제어기술

채근병a ; 심범식b ; 김영신c ; 김후식c ; 김봉호c ; 이원균b, *
High Speed and High Precision Control of Pneumatic Cylinder for a Servo-pneumatic Fatigue Testing Machine
Geun Byeong Chaea ; Bumsik Simb ; Yeongshin Kimc ; Hushik Kimc ; Bongho Kimc ; Wonkyun Leeb, *
aReliability Assessment Center of Korea Institute of Machinery & Materials
bSchool of Mechanical Engineering, Chungnam National Univ.
cJKSYS

Correspondence to: *Tel.: +82-42-821-6575 E-mail address: wklee@cnu.ac.kr (Wonkyun Lee).

Abstract

A hydraulic cylinder is typically used in fatigue testing machines for generating reciprocal motion. Hydraulic cylinders adversely affect the environment because they consume high amounts of oil for maintenance. Pneumatic cylinders can serve as potential alternatives to overcome this drawback. However, it is difficult to control a pneumatic cylinder with high accuracy due to the compressibility of air. This study presents a new control method for high-speed and high-precision control of a pneumatic cylinder for a servo-pneumatic fatigue testing machine. Displacement and load controllers with proportional-proportional-integral feedback and feedforward algorithms are proposed. Furthermore, an auto-tuning algorithm of a feedforward controller gain is proposed to improve control performance. A servo-pneumatic fatigue testing machine is constructed, and the control performance is evaluated via displacement and load control experiments at the various conditions.

Keywords:

Adaptive control, Automatic gain tuning, Fatigue testing machine, Pneumatic servo system

Acknowledgments

이 연구는 충남대학교 학술연구비에 의해 지원되었음.

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Geun Byeong Chae

Master of Science in Mechanical Engineering in 2020, from Chungnam National University.He is currently a researcher at the Reliability Assessment Center of Korea Institute of Machinery & Materials. His research interest in intelligent manufacturing.

E-mail: chaegb@kimm.re.kr

Beomsik Sim

Master course student in the School of Mechanical Engineering, Chungnam National University.His research interest is digital manufacturing.

E-mail: dale93@naver.com

Yeongshin Kim

Master of Science in Mechanical Engineering in 2006, from Sungkyunkwan University.He works for JKSYS Inc. His research interest in Mechanical Engineering.

E-mail: snape123@naver.com

Hushik Kim

Doctor course student in the School of Mechanical Engineering, Chungnam National University.He works for JKSYS Inc. His research interest in Mechanics and Mechatronics.

E-mail: hskim_6960@naver.com

Bongho Kim

University graduate of Science in Mechanical Engineering in 2011, from Hanbat National University.He works for JKSYS Inc. His research interest in Mechatronics.

E-mail: hi_jaejae@naver.com

Wonkyun Lee

Professor in the School of Mechanical Engineering, Chungnam National University.His research interest is manufacturing engineering.

E-mail: wklee@cnu.ac.kr