模型预测控制在大型液压机同步平衡控制系统中的仿真研究  

Simulation study on MPC in synchronous balance control system for die forging press

作　　者：李江波[1,2] 黄明辉[1,2] 陆新江[1,2] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]中南大学现代复杂设备设计与极端制造教育部重点实验室,湖南长沙410083

出　　处：《锻压技术》2011年第2期78-82,共5页Forging & Stamping Technology

基　　金：国家973重点基础发展计划项目(2005CB724102)

摘　　要：大型模锻液压机活动横梁的角度保持精度直接影响锻件的加工精度和机体受力状况。首先分析了液压机同步平衡系统的原理,建立了同步平衡系统多输入多输出数学模型,并针对同步平衡系统时变、时滞、强耦合和非线性的特点,选用模型预测控制来保证活动横梁的角度位置精度。仿真结果表明,与传统PID控制方法相比,模型预测控制具有控制精度高、响应速度快和稳定性好等优点。The forging accuracy of the pieces and the stress condition of the press are directly affected by the angle holding precision of the moving beam for large-scale die forging press.The synchronous balance system of a large-scale die forging press was analyzed firstly and then an MIMO mathematical model of the system was built.Aiming at the characters of time-varying,time-delay,strongly coupling and nonlinear,the model predictive control was chosen to ensure the angle holding precision of the moving beam.The simulation results show that comparing to conventional PID control method,the MPC has the advantage of high control precision,fast response and good stability.

关 键 词：模型预测控制 液压机 同步平衡系统 活动横梁 

分 类 号：TG315.4[金属学及工艺—金属压力加工]