Title :
A two-layered fuzzy logic controller for proportional hydraulic system
Author :
Pratumsuwan, Pornjit ; Thongchai, Siripun
Author_Institution :
Teacher Training in Mech. Eng. Dept., King Mongkut´´s Univ. of Technol. North Bangkok, Bangkok, Thailand
Abstract :
Existing fuzzy control methods do not perform well when applied to proportional hydraulic systems (PHS) containing nonlinearities arising from unknown deadzones. In this paper, a two-layered fuzzy logic controller is proposed for controlling a PHS with deadzones. The two-layered control structure consists of a fuzzy logic-based precompensator followed by a usual fuzzy PD controller. This system was implemented for PHS position control. The results show that a two-layered fuzzy logic controller has superior performance compared to usual fuzzy PD controller. In addition, the proposed scheme is robust to disturbance.
Keywords :
PD control; compensation; control nonlinearities; fuzzy control; hydraulic control equipment; dead zone; fuzzy PD controller; nonlinearity; precompensator; proportional hydraulic system; two-layered fuzzy logic controller; Control systems; Error correction; Fuzzy control; Fuzzy logic; Hydraulic systems; PD control; Proportional control; Servomechanisms; Steady-state; Valves; deadzones; fuzzy logic-based precompensator; proportional hydraulic system; twolayered fuzzy logic controller;
Conference_Titel :
Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4244-2799-4
Electronic_ISBN :
978-1-4244-2800-7
DOI :
10.1109/ICIEA.2009.5138715
