Output feedback preset performance control method for electro-hydraulic servo system

• Main Authors: XU ZHANGBAO, LIU QINGYUN, QI GUOLIANG, GUO YONGCUN, HU XIAOLEI
• Format: Patent
• Language: Chinese; English
• Published: 07.09.2021
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention discloses an output feedback preset performance control method for an electro-hydraulic servo system, and belongs to the technical field of electro-hydraulic servo control. The method comprises the following steps: 1, establishing a double-outlet-rod hydraulic cylinder servo system model; 2, designing an output feedback preset performance controller of the electro-hydraulic servo system; 3, adjusting relevant parameters to enable the system to meet control performance indexes. A performance controller is preset through output feedback designed by the method, unknown state observation and interference approximation are carried out through a state observer and a parameter self-adaption law, and system performance is restrained through a preset performance function; the problems of uncertainty and unknown state of the electro-hydraulic servo system can be effectively solved, the overall stability of the system is finally proved through Lyapunov, asymptotic tracking of the system is theoretically ac