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Publishing Language: Chinese

Feedback-feedforward variable gain iterative learning method adopted in electro-hydraulic position servo system

Xuan LIU, Weibo LI( ), Zhenjie ZOU, Jiajun GAO, Jinhao ZHAN
School of Automation, Wuhan University of Technology, Wuhan 430070, China
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Abstract

Objective

In order to realize the precise control of a certain type of electro-hydraulic position servo system, a feedback-feedforward variable gain iterative learning method is proposed.

Method

First, the simplified model of the electro-hydraulic position servo system is established, then the iterative learning control algorithm is improved and a variable gain learning law with a forgetting factor is adopted. Finally, Matlab simulation is carried out for verification.

Results

The simulation results show that compared with traditional iterative learning and PID control, the improved iterative learning algorithm has better convergence and smaller tracking error, and can make the electro-hydraulic position servo system track the position curve quickly and accurately with improved dynamic characteristics.

Conclusion

The results of this paper can provide references for the control performance optimization and practical engineering application of electro-hydraulic position servo systems.

Keywords

electro-hydraulic position servo systemfeedback-feedforwarditerative learning controlSimulink simulation
CLC number: U665.13 Document code: A

References

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Chinese Journal of Ship Research
Volume 17 Issue 6,
December 2022
Pages 148-154
DOI: 10.19693/j.issn.1673-3185.02461

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Cite this article:
LIU X, LI W, ZOU Z, et al. Feedback-feedforward variable gain iterative learning method adopted in electro-hydraulic position servo system. Chinese Journal of Ship Research, 2022, 17(6): 148-154. https://doi.org/10.19693/j.issn.1673-3185.02461

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Received: 26 July 2021
Revised: 29 October 2021
Published: 28 December 2022
© 2022 Chinese Journal of Ship Research.