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Advanced Application of Centralized Control for a Scanning Mirror System Based on EtherCAT Fieldbus

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  • Control Theory and Applications
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Abstract

Distributed control is the most popular control strategy for controlling numerous slave devices. However, the performance of slave devices is hard to improve because the control algorithm is handled by the commercial slave devices. Therefore, this paper proposes a hybrid control structure that follows the concept of centralized control strategy and handles part of the control loop on the master computer in a distributed control system through EtherCAT fieldbus. In this study, different advanced control methods such as robust control and learning control were applied to handle the position control loop of a scanning mirror system in a selective laser melting (SLM) system with stringent demand of position error around 40 µm based on EtherCAT fieldbus. By designing a proper controller, the experiment results showed that the tracking performance was significantly improved. The tracking error dropped by about 80% after the proposed hybrid control structure was applied. By applying the proposed hybrid control structure, one can improve the high-performance-requirement devices, while reducing the calculation burden of the master computer for other low-performance-requirement devices by retaining the benefit of distributed control.

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan, ROC

    Ruei-Yu Huang, Yen-Jen Chen, Yu-Xian Chen, Chung-Wei Cheng & An-Chen Lee

  2. Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan, ROC

    Mi-Ching Tsai

Authors
  1. Ruei-Yu Huang
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  4. Chung-Wei Cheng
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  5. Mi-Ching Tsai
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  6. An-Chen Lee
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Correspondence to An-Chen Lee.

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Publisher’s Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Recommended by Associate Editor Le Van Hien under the direction of Editor Kyoung Kwan Ahn. This work was partially supported by the Ministry of Science and Technology of Republic of China, under Contract MOST 108-2221-E-009-117-MY3, Contract MOST 108-2218-E-006-009, and Contract MOST 108-2218-E-008-019.

Ruei-Yu Huang received his M.S. degree in mechanical engineering from National Chiao Tung University in 2017. He is currently a Ph.D. student in the Department of Mechanical Engineering of National Chiao Tung University, Taiwan. His research interests include robust control, and motion planning.

Yen-Jen Chen received his M.S. degree in mechanical engineering from National Chiao Tung University in 2019. He is currently an engineer in Delta Electronics, Inc. His research interests include robust control, and motion planning.

Yu-Xian Chen received his Master’s degree in mechanical engineering from National Chiao Tung University in 2018. He is currently a Ph.D. student in the Department of Mechanical Engineering of National Chiao Tung University, Taiwan. His research interests include robust control, and learning control.

Chung-Wei Cheng received his Ph.D. degree in mechanical engineering from National Cheng Kung University, Taiwan, in 2003. He is currently a Professor with the Department of Mechanical Engineering of National Chiao Tung University, Taiwan. His research interests include laser precision microfabrication, and laser additive manufacturing.

Mi-Ching Tsai received his Ph.D. degree in engineering science from the University of Oxford, Oxford, U.K., in 1990. He is currently the Chair Professor with the Department of Mechanical Engineering, National Cheng Kung University, Taiwan. He has authored or coauthored more than 127 journal articles. He holds more than 122 patents. His research interests include robust control, servo control, motor design, and applications of advanced control technologies using DSPs. Prof. Tsai is a Fellow of the Institution of Engineering and Technology, U.K. He was an Associate Editor of the IEEE/ASME TRANSACTIONS ON MECHATRONICS, from 2003 to 2007, and the Deputy Minister of Ministry of Science and Technology, Taiwan, from 2016 to 2017.

An-Chen Lee received his Ph.D. degree in mechanical engineering from the University of Wisconsin-Madison, Madison, WI, USA, in 1986. He is designated as the Chair Professor of National Chiao Tung University, Hsinchu, where he is currently a Professor in the Department of Mechanical Engineering. His current research interests include CNC machine tool control technology, magnetic bearing technology, rotor dynamic and control, and semiconductor manufacturing process control. Prof. Lee was an Editorial Board Member of the International Journal of Precision Engineering and Manufacturing and the Chinese Society of Mechanical Engineers. He is the recipient of National Science Committee (NSC) Excellent Research Award (1991–1992), the NSC Distinguished Research Award (1993–1994, 1995–1996, 1997–1998), the NSC Research Fellow Award (1999–2001, 2002–2004), the NSC Research Fellow Award (2005), the Chinese Society of Mechanical Engineers Distinguished Engineering Professor Award (2001), the Gold Medal Award, Inventor/New Product Exposition (INPEX), Pittsburgh, USA (2010), the Gold Medal Award, International Exhibition of Inventions of Geneva (2011).

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Huang, RY., Chen, YJ., Chen, YX. et al. Advanced Application of Centralized Control for a Scanning Mirror System Based on EtherCAT Fieldbus. Int. J. Control Autom. Syst. 19, 1205–1214 (2021). https://doi.org/10.1007/s12555-019-0754-5

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