Gray-box modeling and QFT control for precision servo transmission systems

doi:10.1007/s11465-011-0242-y

Front Mech Eng

2011, Vol. 6

Issue (4) : 442-448 https://doi.org/10.1007/s11465-011-0242-y

RESEARCH ARTICLE

Gray-box modeling and QFT control for precision servo transmission systems

Xiulan BAO(

), Xuedong CHEN, Xin LUO, Haocheng ZUO

State Key Laboratory of Digital Manufacturing Equipment & Technology, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

Precision servo transmission systems have widely been applied in industrial equipment to achieve high accuracy and high speed motion. However, due to the presence of friction and uncertainty, the characteristics of precision servo transmission systems are variant depends on the working conditions, leading to oscillation and instability in the system performances. In this paper, a grey-box model of the system is established, the model structure derived from the theoretical modeling and the model parameters are obtained by experiments using set membership identification method. This paper proposes two-degrees of freedom (2-DOF) robust position controller for a precision servo transmission system, based on the quantitative feedback theory (QFT), to achieve high accuracy and consistent tracking performance even in presence of considerable system uncertainties and friction disturbances. The results of simulate and experiment validate the effectiveness of the proposed controller.

Keywords precision servo transmission system modeling set membership identification quantitative feedback theory (QFT) robustness

Corresponding Author(s): BAO Xiulan,Email:stupidm@gmail.com

Issue Date: 05 December 2011

Cite this article:

Xuedong CHEN,Xin LUO,Haocheng ZUO, et al. Gray-box modeling and QFT control for precision servo transmission systems[J]. Front Mech Eng, 2011, 6(4): 442-448.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-011-0242-y
https://academic.hep.com.cn/fme/EN/Y2011/V6/I4/442

Fig.1 Schematic of the precision servo transmission system

Fig.2 Experimental schematic of the precision servo transmission system

Fig.3 Identification results of two different conditions. (a) Overdamped; (b) underdamped

Fig.4 Control structure of QFT

Fig.5 Intersection bounds in QFT design

Fig.6 The simulation analysis results of track performance

Fig.7 The experiment results of precision servo transmission system

Fig.8 The experiment results of precision servo transmission system

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