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System characteristics of open radial variable plunger pump-controlled hydraulic press controlled by fuzzy PID

Published:2023-11-01 author:HOU Xuekun, CHU Zefei, LIU Yan, et al. Browse: 350 Check PDF documents

System characteristics of open radial variable plunger pump-controlled hydraulic

press controlled by fuzzy PID

HOU Xuekun1, CHU Zefei1, LIU Yan1, CHEN Wenting2, BA Kaixian2

(1.College of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Shijiazhuang

050100, China; 2.School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

Abstract: The transmission system efficiency and control accuracy of traditional large hydraulic press are low. Under the concept of energy saving, low carbon and environmental protection, the integration of high-precision pump control technology and high-performance hydraulic press control system has been widely concerned by the industry. In order to solve the problem of insufficient position control accuracy of open radial variable piston pump-controlled hydraulic press system, an adaptive fuzzy PID control system was designed, and the characteristics of fast forging system under different working conditions were studied. Firstly, the mathematical models of the digital control enhanced radial piston pump and the open pump controlled asymmetric cylinder were established, the mathematical model of the open radial variable piston pump controlled hydraulic press system was derived, and the adaptive fuzzy PID controller was designed. Then, the simulation study of the fast-forging control characteristics under different working conditions was carried out by AMESim-Simulink simulation. Finally, based on 0.6MN pump-controlled hydraulic press platform, the effectiveness of adaptive fuzzy PID and the control characteristics of the fast-forging system were verified. The results show that under the two working conditions of fast forging frequency of 1Hz, stroke of 20mm and load of 1.2×105N, and fast forging frequency of 0.5Hz, stroke of 40mm and load of 2.0×105N, the open radial variable piston pump-controlled hydraulic press system with adaptive fuzzy PID control operates stably, responds quickly, and the position accuracy error is less than 0.5mm. The validity of the simulation model and the effectiveness of the controller of open radial variable piston pump-controlled hydraulic press are verified.

Key words: metal forming machinery; radial piston pump; pumpcontrolled hydraulic press; transmission system efficiency; position control accuracy; fuzzy PID controller; AMESim-Simulink

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