Precise feedback linearization in EMS systems based on a disturbance observer

doi:10.16511/j.cnki.qhdxxb.2015.22.016

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Abstract Electromagnetic suspension (EMS) systems are unstable open-loop, strongly nonlinear systems. The suspension accuracy of EMS systems for machine tools is improved by integrating the feedback linearization method with a disturbance observer (DOB) to precisely linearize the EMS system. The feedback linearization error is analyzed and modeled in this paper. The DOB is then designed to compensate for the feedback linearization error. This study indicates that the DOB effectively compensates for the feedback linearization error to give precise linearization of EMS systems. Tests illustrate that the EMS feed system gives precise linearization and the platform suspension accuracy is greatly improved to micron scale accuracy.

Keywords machine tool electromagnetic suspension feedback linearization disturbance observer

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Issue Date: 15 October 2015

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	JIANG Wenxue
	ZHOU Kai

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JIANG Wenxue,ZHOU Kai. Precise feedback linearization in EMS systems based on a disturbance observer[J]. Journal of Tsinghua University(Science and Technology), 2015, 55(10): 1067-1071.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2015.22.016 OR http://jst.tsinghuajournals.com/EN/Y2015/V55/I10/1067

[1] 郭庆鼎, 赵希梅, 孙宜标, 等. 磁悬浮横梁零相位直线驱动龙门移动镗铣床及控制方法[P]. 中国: CN200610047574.X. 2007-02-21.GUO Qingding, ZHAO Ximei, SUN Yibiao, et al. EMS Cross Rail Zero-Phase Linear Drive Gantry Machine and Control Method [P]. China: CN200610047574.X. 2007-02-21. (in Chinese)
[2] 王丽梅, 石佳. 基于反馈线性化的龙门数控机床磁悬浮系统滑模鲁棒控制[J]. 机床与液压, 2008, 36(5): 254-256.WANG Limei, SHI Jia. Sliding mode control of magnetic levitation system used in gantry NC machine tool based on feedback linearization [J]. Machine Tool & Hydraulics, 2008, 36(5): 254-256. (in Chinese)
[3] 安明伟. 机床用磁悬浮系统悬浮高度的鲁棒控制研究[D]. 沈阳: 沈阳工业大学, 2010.AN Mingwei. Robust Control of Levitation Height in Electromagnetic Levitation System Used in Machine Tool [D]. Shenyang: Shenyang University of Technology, 2010. (in Chinese)
[4] 王军闯. NC机床磁悬浮进给机构研究[D]. 大连: 大连交通大学, 2006.WANG Junchuang. Study on Magnetic Suspension Feed Mechanism for NC Machine Tools [D]. Dalian: Dalian Jiaotong University, 2006. (in Chinese)
[5] 葛研军, 张文跃, 蒋成勇, 等. 数控机床磁浮直线进给系统[P]. 中国: CN200610161995.5. 2007-08-29.GE Yanjun, ZHANG Wenyue, JIANG Chengyong, et al. EMS Linear Feed Drive System of NC Machine Tool [P]. China: CN200610161995.5. 2007-08-29. (in Chinese)
[6] 张钢, 汪希平, 朱礼进, 等. 工业应用型主动磁悬浮机床导轨直线电机进给平台[P].中国: CN200310107944.0. 2004-09-15.ZHANG Gang, WANG Xiping, ZHU Lijin, et al. Industrial EMS Linear Motor Feed Drive Platform of Machine Tool [P]. China: CN200310107944.0. 2004-09-15. (in Chinese)
[7] 吴国庆. 用于数控机床的磁悬浮支承系统及其控制技术[D]. 上海: 上海大学, 2006.WU Guoqing. Magnetic Suspension Supporting System and Its Control Technology Used for Numerical Control Machine [D]. Shanghai: Shanghai University, 2006. (in Chinese)
[8] JIANG Wenxue, ZHOU Kai, LV Jiangwei, et al. Superconducting EMS feed drive system of NC machine tool [J]. International Journal of Advanced Manufacturing Technology, 2014, 74(5-8): 1053-1060.
[9] Trumper D L, Olson S M, Subrahmanyan P K. Linearizing control of magnetic suspension systems [J]. IEEE Transactions on Control Systems Technology, 1997, 5(4): 427-438.
[10] Da Rocha P H, Ferreira H C, Porsch M C, et al. Fixed-point DSP implementation of nonlinear controller for large gap electromagnetic suspension system [J]. Control Engineering Practice, 2009, 17(10): 1148-1156.
[11] Sungjun J, Seo J H. Design and analysis of the nonlinear feedback linearizing control for an electromagnetic suspension system [J]. IEEE Transactions on Control Systems Technology, 1997, 5(1): 135-144.
[12] 刘德君, 郭庆鼎, 翁秀华. 直线电动机驱动3-DOF磁浮平台推力解耦控制[J]. 机械工程学报, 2005, 41(1): 234-238.LIU Dejun, GUO Qingding, WENG Xiuhua. Thrust decoupling control of linear motor driver 3-DOF planar magnetic suspension stage [J]. Chinese Journal of Mechanical Engineering, 2005, 41(1): 234-238. (in Chinese)

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