NDLI: Robust controller design for CNC servo motors against the variation of external loading via the H∞/QFT approach

Content Provider	IEEE Xplore Digital Library
Author	Bo-Yi Wu Pau-Lo Hsu
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan (Bo-Yi Wu; Pau-Lo Hsu)
Abstract	In industrial applications servo motors are applied to different loads and varied control performance is thus unavoidable. Under such circumstances, engineers usually re-design or re-tune controller parameters to meet certain design specifications without reliable and consistent control performance or motion precision. In robust controller design, the quantitative feedback theory (QFT) is adopted by applying both the loop-shaping design and the feedforward controller in its feedback loop with a suitable order determined from experience. On the other hand, $H_{∞}$ controller is designed in frequency domain but is directly calculated in time domain with the controller type without restriction in selecting its order. However, $H_{∞}$ controller only deals with sensitivity without meeting control performance as in QFT design. In this study, the combined approach by using both the $H_{∞}$ algorithm and the QFT controller with better robustness is applied to the servo motor control design; in addition, the QFT feedforward controller in loop-shaping is included to lead to desirable control performance. Experimental results show that by applying the present $H_{∞}/QFT$ approach, the similar system responses under different external loading on the CNC servo motor can be successfully obtained to prove the feasibility of the present method in industrial automation.
Sponsorship	IEEE Ind. Electron. Soc. (IES)
Starting Page	1467
Ending Page	1471
File Size	532070
Page Count	5
File Format	PDF
e-ISBN	9781467391078
DOI	10.1109/AIM.2015.7222748
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-07
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conferences Mechatronics
Content Type	Text
Resource Type	Article

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