The velocity control of an electro-hydraulic displacement-controlled system using adaptive fuzzy controller with self-tuning fuzzy sliding mode compensation
Resource
Asian Journal of Control, 13(4), 492-504
Journal
Asian Journal of Control
Pages
492-504
Date Issued
2011
Date
2011
Author(s)
Abstract
Hydraulic servo control systems have been used widely in industry. Within the realm of hydraulic control systems, conventional hydraulic valve-controlled systems have higher response and lower energy efficiency, where as hydraulic displacement-controlled servo systems have higher energy efficiency. This paper aims to investigate the velocity control performance of an electro-hydraulic displacement-controlled system (EHDCS), where the controlled hydraulic cylinder is altered by a variable displacement axial piston pump to achieve velocity control. For that, a novel adaptive fuzzy controller with self-tuning fuzzy sliding-mode compensation (AFC-STFSMC) is proposed for velocity control in EHDCS. The AFC-STFSMC approach combining adaptive fuzzy control and the self-tuning fuzzy sliding-mode control scheme, has the advantages of the capability of automatically adjusting the fuzzy rules and of reducing the fuzzy rules. The proposed AFC-STFSMC scheme can design the sliding-mode controller with no requirement on the system dynamic model, and it can be free of chattering, thereby providing stable tracking control performance and robustness against uncertainties. Moreover, the stability of the proposed scheme via the Lyapunov method is proven. Therefore, the velocity control of EHDCS controlled by AFC-STFSMC is implemented and verified experimentally in different velocity targets and loading conditions. The experimental results show that the proposed AFC-STFSMC method can achieve good velocity control performance and robustness in EHDCS with regard to parameter variations and external disturbance. © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society.
SDGs
Other Subjects
Controllers; Displacement control; Energy efficiency; Fuzzy control; Fuzzy inference; Fuzzy rules; Lyapunov methods; Piston displacement; Reciprocating pumps; Robustness (control systems); Sliding mode control; Tuning; Velocity; Velocity control; Adaptive fuzzy control; Adaptive fuzzy controller; Electro-hydraulic displacement-controlled systems; Fuzzy sliding mode control; Hydraulic control systems; Hydraulic servo control; Sliding mode controller; Variable displacement axial piston pumps; Adaptive control systems
Type
journal article
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