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Finite-time tracking control for motor servo systems with unknown dead-zones

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Abstract

A finite-time tracking control scheme is proposed in this paper based on the terminal sliding mode principle for motor servo systems with unknown nonlinear dead-zone inputs. By using the differential mean value theorem, the dead-zone is represented as a time-varying system and thus the inverse compensation approach is avoided. Then, an indirect terminal sliding mode control (ITSMC) is developed to guarantee the finite-time convergence of the tracking error and to overcome the singularity problem in the traditional terminal sliding mode control. In the proposed controller design, the unknown nonlinearity of the system is approximated by a simple sigmoid neural network, and the approximation error is diminished by employing a robust term. Comparative experiments on a turntable servo system are conducted to show the superior performance of the proposed method.

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Authors and Affiliations

  1. College of Information Engineering, Zhejiang University of Technology, Hangzhou, 310023, China

    Qiang Chen, Li Yu & Yurong Nan

Authors
  1. Qiang Chen
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  2. Li Yu
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  3. Yurong Nan
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Corresponding author

Correspondence to Qiang Chen.

Additional information

This research is supported by the Scientific Research Foundation of the Education Department of Zhejiang Province, China under Grant No. Y201329260, the Natural Science Foundation of Zhejiang Province, China under Grant No. LZ12E07003, and the National Natural Science Foundation of China under Grant No. 51207139.

This paper was recommended for publication by Editor HONG Yiguang.

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Chen, Q., Yu, L. & Nan, Y. Finite-time tracking control for motor servo systems with unknown dead-zones. J Syst Sci Complex 26, 940–956 (2013). https://doi.org/10.1007/s11424-013-2153-y

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  • DOI: https://doi.org/10.1007/s11424-013-2153-y

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