Cited by 48Hydraulic and Pneumatic SystemsAdaptive Control of Nonlinear SystemsDynamics and Control of Mechanical Systems

Extended sliding mode observer‐based high‐accuracy motion control for uncertain electro‐hydraulic systems

Nguyen, Manh Hung, Dao, Hoang Vu, Ahn, Kyoung Kwan·2023·International Journal of Robust and Nonlinear Control

Abstract

In this paper, a novel robust backstepping control strategy is introduced to achieve high‐accuracy tracking performance for electro‐hydraulic servo systems (EHSSs) without velocity information in the presence of uncertainties and disturbances. Firstly, system dynamics of the studied EHSS considering parameter deviations, modeling errors, and unknown external loads which are grouped into lumped mismatched and matched disturbances in the mechanical system and pressure dynamics, respectively, are developed. On the basis of the sliding mode theory, two extended sliding mode observers (ESMOs) are originally established to simultaneously estimate the immeasurable angular velocity of the actuator, and lumped mismatched and matched uncertainties. As a consequence, an observer‐based controller is designed using the conventional backstepping technique to ensure a highly accurate tracking position control. In addition, the stability of the observer and overall closed‐loop control system is conclusively proven through the Lyapunov theory. Finally, several numerical simulations for an EHSS with a hydraulic rotary actuator are conducted to demonstrate the advantage of the recommended method compared to the existing well‐known extended state observer‐based control approaches.

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Crossref · 10.1002/rnc.6421

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Authors
Nguyen, M. H., Dao, H. V., & Ahn, K. K.
Affiliations
University of Ulsan (KR)
Corresponding author
Ahn, Kyoung Kwan
Venue
International Journal of Robust and Nonlinear Control
Publisher
Wiley
Published
2022-10-17
Volume
33
Issue
2
Pages
1351-1370
ISSN
  • 1049-8923 (ISSN-L)
  • 1099-1239
OpenAlex
W4306658470
Cited by
48
References
51
Citations by year
2026: 12 · 2025: 13 · 2024: 15 · 2023: 7 · 2022: 1
FWCI
3.40
Type
journal article
Language
en
Open access
closed
Locations
International Journal of Robust and Nonlinear Control (publishedVersion)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Hydraulic and Pneumatic Systems
  • Physical Sciences › Engineering › Control and Systems Engineering › Adaptive Control of Nonlinear Systems
  • Physical Sciences › Engineering › Control and Systems Engineering › Dynamics and Control of Mechanical Systems
Keywords
electro-hydraulic servo system, backstepping control, position tracking control, velocity estimation, mismatched disturbances, matched disturbances, parameter deviation, robust control

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