Transactions of Materials and Heat Treatment

Title：Electro-hydraulic servo motion control method for hollow forging mandrel of precision forging press based on feedforward tracking compensation

Authors： Lin Suhong1 2 Kou Yanyan3 Lei Bingwang3

Unit： 1.College of Mechanical Engineering Taiyuan University of Technology 2. Advanced Forming and Intelligent Equipment Research Institute Taiyuan University of Technology 3. Inner Mongolia North Heavy Industries Group Corp.Ltd.

KeyWords： precision forging press vibration and impact speed feedforward PI control algorithm positioning accuracy

ClassificationCode：TG315.4

year,vol(issue):pagenumber：2025,50(3):170-175

Abstract：

For the problem of significant vibration and impact in the motor of precision forging press mandrel trolley during startup, the electro-hydraulic servo control mechanism for mandrel movement in the precision forging press was systematically analyzed. Mathematical models of each component in the electro-hydraulic servo system were established. A simulation model for electro-hydraulic servo system of the mandrel movement trolley was developed using the Matlab/Simulink simulation platform. The motion controller of the mandrel trolley and the electro-hydraulic servo closed-loop controller based on feedforward tracking compensation were respectively designed. Simulation and experimental results demonstrate that the electro-hydraulic servo motion control algorithm based on feedforward tracking compensation can control the mandrel trolley to run smoothly, thus solving the problem of mandrel impact during trolley startup. The implementation of speed feedforward significantly reduces the displacement tracking errors. By comparing the tracking errors under different speed feedforward coefficients, it is found that when the speed feedforward coefficient is 0.5, the tracking error of the system is the smallest and the control effect is the best.

Funds：

国防基础科研计划（JCKY2022208A002）

作者简介：蔺素宏（1990-），男，博士，实验师 E-mail：linsuhong@tyut.edu.cn

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