基于PFC-(PID-H_∞)300MN模锻水压机动梁速度跟踪控制  

Speed tracking control of moving beam for 300 MN die forging hydraulic press based on PFC-(PID-H_∞)

作　　者：黄长征[1] 谭建平[2] 

机构地区：[1]韶关学院机电工程系,广东韶关512005 [2]中南大学机电工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2010年第3期966-970,共5页Journal of Central South University:Science and Technology

基　　金：国家高技术研究发展计划("863"计划)项目(2007AA04Z417)

摘　　要：提出基于PFC-(PID-H∞)的双闭环串级速度跟踪控制策略,内环为基于PID-H∞串级控制的凸轮转角控制环,外环为基于预测函数控制器的动梁速度控制环。将内控制环及后续水路系统看作PFC的广义被控对象,将广义被控对象简化为一阶加纯滞后对象,作为PFC的预测模型,设计水压机动梁速度跟踪控制系统,从模型失配、外加干扰2个方面对控制系统进行仿真。仿真和试验结果表明:该控制系统稳态精度、动态品质、跟踪性能和鲁棒性好,在不同载荷下,动梁速度控制精度为0.26～1.35mm/s。A double-closed-loop PFC-（PID-H∞） cascade speed tracking control system of moving beam for 300 MN die forging hydraulic press was put forward and designed. The inner control loop is cam rotational angle PID-H∞ cascade control. The outer control loop is moving beam＇s speed PFC control. The inner control loop and subsequent waterway system were regarded as a generalized controlled object of PFC; the generalized controlled object was simplified as an one-order system with time delay,and as a prediction model of PFC. Some simulations of the PFC-（PID-H∞） system were made in the mismatched model and the disturbance. The simulation and test results show that the control system has good steady-state accuracy,dynamic characteristic,robustness and traceability,and the speed control accuracy is 0.26-1.35 mm/s under different loads.

关 键 词：模锻水压机 动梁 速度控制 预测函数控制(PFC) 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]