模锻装备复杂锻造过程两环控制方法  

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

作　　者：隋昊 陈宇 Sui Hao;Chen Yu(State Key Laboratory of High Performance and Complex Manufacturing,College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院高性能复杂制造国家重点实验室

出　　处：《锻压技术》2018年第8期122-130,共9页Forging & Stamping Technology

基　　金：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)

摘　　要：高品质锻件的成形需要模锻装备具有稳定运行的能力,然而锻造液压驱动过程的强非线性使其难以实现精确控制。针对这一问题,提出了一种基于非线性动态分析的两环控制方法,与现有的专门针对某种特定锻件的控制方法不同,该控制方法可以有效地用于不同锻件的锻造过程。首先推导了闭环锻造系统的非线性数学模型,并提出一种该模型的求解方法,针对该模型的解进一步分析了闭环锻造系统的动力学特性,推导出系统稳定运行的条件以及控制器参数与约束条件之间的关系。通过对几种典型锻件的仿真试验,验证了分析结果的正确性和所设计控制器的有效性,结果表明新的控制方法具有更好的控制效果。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.

关 键 词：模锻装备 非线性动态分析 锻造过程 两环控制 控制器 

分 类 号：TG315.4[金属学及工艺—金属压力加工]