Design of Position Control Method for Pump-Controlled Hydraulic Presses via Adaptive Integral Robust Control

This paper takes the position control performance of pump-controlled hydraulic presses as the research object. The control methods are designed respectively for the two motion stages of rapid descent and slow descent of hydraulic presses in order to improve the control performance of the system. Fir...

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Bibliographic Details
Published in:Processes 2022-01, Vol.10 (1), p.14
Main Authors: Huang, Zhipeng, Xu, Yuepeng, Ren, Wang, Fu, Chengwei, Cao, Ruikang, Kong, Xiangdong, Li, Wenfeng
Format: Article
Language:English
Subjects:
Accuracy
Adaptive control
Control algorithms
Control methods
Controllers
Design
Hydraulic presses
Hydraulics
Interference
Laplace transforms
Mathematical models
Model accuracy
Robust control
Servocontrol
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Summary:This paper takes the position control performance of pump-controlled hydraulic presses as the research object. The control methods are designed respectively for the two motion stages of rapid descent and slow descent of hydraulic presses in order to improve the control performance of the system. First of all, the accuracy model of the pump-controlled hydraulic presses position servo system (the pump-controlled hydraulic presses position servo system, which is called PCHPS) and its MATLAB/Simulink simulation platform are established. Based on the theoretical analysis and experimental data, the interference factors affecting the tracking accuracy and positioning accuracy of the PCHPS are analyzed. Then, an adaptive integral robust control (the adaptive integral robust control, which is called AIRC) for PCHPS is designed to reduce the influence of nonlinear factors on the system, and the effectiveness of the controller is verified by simulation. Finally, the position control experiment of PCHPS is designed, and the experimental results show that the AIRC can effectively reduce nonlinear factors such as unknown interference in the slow-down stage of the system. The positioning accuracy is raised to within 0.008 mm, which improves the process level of the hydraulic presses.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr10010014