Transactions of Materials and Heat Treatment

Title：Fuzzy-PID control on active rectify deviation system for multi-cylinder driving hydraulic machine

Authors： Wang Zhineng Liu Heng Dong Chufeng

Unit： School of Mechanical Engineering Hunan University of Science and Technology

KeyWords： multi-cylinder hydraulic machine rectify deviation fuzzy PID control mathematical model

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):137-141

Abstract：

The rectify deviation performance of multi-cylinder driving hydraulic machine directly determines the processing quality of forgings. Due to the influences of factors such as time log of hydraulic system, coupling characteristics between multiple cylinders and complex eccentric moments, the movable crossbeam of the hydraulic machine is prone to deflection. Therefore, considering the above problems, a mathematical model for the rectify deviation process of the multi-cylinder driving hydraulic machine was established according to the force balance and the moment balance of the movable beam, and taking the extension of hydraulic cylinder as the control variable and the deflection angle as the objective function, the fuzzy control rule table of the rectify deviation system was proposed, and the fuzzy PID control method with strong adaptability was formed. Simulation results show that under the action of fuzzy PID control, the steady-state inclination of the movable crossbeam is 0.2×10-3 rad under the uniform load, and it can quickly return to the equilibrium position within 4.2 s under the pulse load. In all, this method can achieve high-precision rectify deviation with fast response speed and high steady-state accuracy.

Funds：

湖南科技大学博士科研启动基金资助项目(E52055)；湖南省自然科学基金资助项目(2020JJ5184)

汪志能（1988-），男，博士，讲师 E-mail：873866634@qq.com

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