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Model of an Rotating Valve Based Electro-Hydraulic Servomechanism and its Dead-Zone Compensation Control

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Abstract:

This paper present the structure of the rotating valve based electro-hydraulic servomechanism and analyze its model. The electro-hydraulic servomechanism consists of the controller, the step motor, the rotating valve and cylinder, and the displacement sensor. In the servomechanisms model, it contains a time-varying dead-zone. To eliminate the dead-zone effect, we construct a dead-zone inverse model compensates the controller output. The parameters of the dead-zone inverse model are tuned on-line according to the dynamic performance of the feedback system by a group of rule functions. The controller employs the SIMENS PLC S7-200 and using STL program realizes control algorithm and the dead-zone inverse model. This simulative and practical experimenting results show that the compensation method is feasible.

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Periodical:

Applied Mechanics and Materials (Volume 420)

Pages:

369-374

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.420.369

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Cite this paper

Online since:

September 2013

Authors:

Yin Song Wang, Hui Li, Liang Tian

Keywords:

Compensation Control, Dead-Zone, Electro-Hydraulic Servomechanism, PLC Controller

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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References

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