Transactions of Materials and Heat Treatment

Title：Two-loop control method of complex forging process for die forging equipment

Authors： Sui Hao Chen Yu

Unit： Central South University

KeyWords： die forging equipment nonlinear dynamic analysis forging process two-loop control controller

ClassificationCode：TG315.4

year,vol(issue):pagenumber：2018,43(8):122-130

Abstract：

The forgings with high quality are produced by die forging equipment with steady operation ability, and the precise control is difficult to achieve because of strong nonlinearity in forging hydraulic drive process. In order to solve this problem, a two-loop control method based on nonlinear dynamic analysis was proposed. Unlike the existing control methods designed specifically for a given workpiece, the proposed control method could be effectively used in the forging process of different workpieces. Firstly, the closed-loop nonlinear mathematical model of the forging process was deduced, and a solving method was developed in order to obtain the model solution. Furthermore, the dynamics characteristic of the closed-loop forging process was further analyzed based on the above solution, and the conditions for steady operation as well as the relationship between controller parameters and constraints were also derived. Finally, the validity of analysis results and the effectiveness of design controller were verified by simulation tests of several typical workpieces. The simulation results show that the new control method has better control effect.

Funds：

国家自然科学基金资助项目（51675539）；湖南省科技领先人才项目（2016RS2015）；中南大学创新驱动计划(2016CX009）

隋昊（1993-），男，硕士研究生，E-mail：suihao@csu.edu.cn；作者简介：陈宇（1990-），男，硕士，讲师，E-mail：1032219342@qq.com

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