Abstract
This paper concentrates on digital hydraulic cylinder systems’ interference suppression and bandwidth expansion problems. The goals are to ensure the system’s stability and improve the rapid response-ability. First, a non-linear dynamics is used instead of linearization to formulate the plan. Then, considering the serious measurement noise of the load acceleration signal and the mismatching uncertainties of the electro-hydraulic servo system in practical applications, a new integral robust control strategy is proposed. Further, through the frequency-domain method, the selection laws of the feedback gains are determined. Finally, the control performance of the system is verified by simulation. The results show that the proposed controller can effectively control uncertainties and improve high-frequency tracking performance.
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This work was supported in part by National Nature Science Foundation of China (52104087, 52174116), and in part by the Key Public Relations Project of Liaoning Province (LJ2019ZL005).
Hui Yu received her B.S. degree in mechanical engineering from Liaoning Technical University, Fuxin, China. She is currently pursuing a doctoral degree in mechanical engineering at Liaoning Technical University, researching electromechanical servo systems and hydraulic servo system control.
Hui Wang received his B.E. degree in mechanical engineering from Liaoning Technical University, Fuxin, China, in 1982, and a Ph.D. degree in mechatronic engineering from the Harbin Institute of Technology, Harbin, China, in 2005. He is currently a professor and a doctoral supervisor with the school of mechanical engineering, Liaoning Technical University. His current research interests include nonlinear control, adaptive control, and hydraulic servo system control.
Chenguang Guo obtained his Ph.D. degree from the institute of advanced manufacturing and automation technology at Northeastern University. He is now an associate professor and doctoral supervisor of the school of mechanical engineering of Liaoning Technical University, Fuxin, China. Mainly engaged in research on advanced manufacturing systems and automation technology.
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Yu, H., Wang, H. & Guo, C. Analysis of Bandwidth Expansion and Interference Suppression of Digital Hydraulic Cylinder System. Int. J. Control Autom. Syst. 22, 1739–1750 (2024). https://doi.org/10.1007/s12555-022-0589-3
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DOI: https://doi.org/10.1007/s12555-022-0589-3