Robust Position Controller Design for Linear Servo Units Used in Noncircular Machining

Abstract:

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This paper presents the design and implementation of a robust motion control structure for linear servo units used in noncircular machining. Compared with ball/screw driven system, the controller of the linear motor driven system must provide a high level of disturbance rejection performance, as the system is more sensitive to force disturbances and parameter variations. Thus, in this paper, a robust feedback controller based on disturbance observer is applied to enhance the stiffness and robustness. A magnitude and phase regulating control scheme (MPRC) is proposed to improve the system tracking accuracy, and a simple error feedforward compensator (EFC) further reduces the feedforward control error that result from inaccurate frequency response data. The effectiveness of the proposed controller is demonstrated by experiments.

Info:

Periodical:

Materials Science Forum (Volumes 471-472)

Edited by:

Xing Ai, Jianfeng Li and Chuanzhen Huang

Pages:

755-759

DOI:

10.4028/www.scientific.net/MSF.471-472.755

Citation:

S.T. Huang et al., "Robust Position Controller Design for Linear Servo Units Used in Noncircular Machining", Materials Science Forum, Vols. 471-472, pp. 755-759, 2004

Online since:

December 2004

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Price:

$35.00

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