Transactions of Materials and Heat Treatment

Title：Speed tracking control on electro-hydraulic system considering variable load disturbance

Authors： Xu Wenbin Zeng Le Zhou Mile

Unit： Airforce Aviation Repair Istitute of Technology Central South University

KeyWords： electro-hydraulic system load disturbance speed tracking multi-model control unified switching control

ClassificationCode：TH117

year,vol(issue):pagenumber：2022,47(8):163-170

Abstract：

Forming speed is one of the key factors affecting metal forming performance. Therefore, in order to improve the stability of forming speed and the quality of metal forming, a dynamic model of electro-hydraulic system was established considering the variable load disturbance electro-hydraulic system. Then, the load simulation of the forming process was carried out under different working conditions, and the dynamic segmented sub-models representing the characteristics of the system at different stages were established. Furthermore, the switching control law was designed by introducing the boundary layer function to replace the sign function, and the compensation term was added to the variable load disturbance. Finally, based on robust feedback linearization control, the unified switching control strategy was proposed, and the system responses of unified switching control, PD control and robust control under different load states and different forming speeds were compared and analyzed by simulation and experiment. The results show that the unified switching control can improve the accuracy and robustness of the system speed control, and the effectiveness of the unified switching control strategy for suppression of the variable load disturbance is verified.

Funds：

湖南省科教联合基金项目(2020JJ7084)

作者简介：许文斌(1977-)，男，硕士，副教授，E-mail：xwb_770210@126.com

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