U-Model-Based Finite-Time Control for Nonlinear Valve-Controlled Hydraulic Servosystem
Joint Authors
Yan, Hao
Li, Jiafeng
Nouri, Hassan
Xu, Lingling
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-10
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Valve-controlled servosystems are widely used in dynamic tracking, but, not properly studied, nonlinearity, perturbation of internal parameters, and external disturbance have significant impacts on the control performance and challenge in the controller design.
This study, with consideration of the finite pressure gain of actual servovalves, proposes a new unified nonlinear model of the valve-controlled servosystem.
Based on a U-control platform, this study makes the control strategy design independent from the nonlinear plant, and a virtual nominal plant is presented to eliminate the unmodeled high-frequency characteristics, acquire the desired control performance, and enable the control variable to be explicitly expressed.
Then, there follows, designing the U-model-based finite-time control in the valve-controlled systems.
Simulation demonstrations show the consistency with theoretical development that the valve-controlled system can smoothly track the command signal within the specified time, and the phase lag is eliminated.
Moreover, U-model’s application effectively copes with the system chattering, and with the maximum of 1 m/s the dynamic position error caused by discretization of the controller is reduced to less than 0.15%, which can satisfy the demand of general valve-controlled servosystems.
American Psychological Association (APA)
Yan, Hao& Li, Jiafeng& Nouri, Hassan& Xu, Lingling. 2020. U-Model-Based Finite-Time Control for Nonlinear Valve-Controlled Hydraulic Servosystem. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1197590
Modern Language Association (MLA)
Yan, Hao…[et al.]. U-Model-Based Finite-Time Control for Nonlinear Valve-Controlled Hydraulic Servosystem. Mathematical Problems in Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1197590
American Medical Association (AMA)
Yan, Hao& Li, Jiafeng& Nouri, Hassan& Xu, Lingling. U-Model-Based Finite-Time Control for Nonlinear Valve-Controlled Hydraulic Servosystem. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1197590
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1197590