(1.中南工业大学信息工程学院,长沙410083;
2.湖南大学机械与汽车工程学院,长沙410082;
3.西南铝加工厂锻造分厂,重庆631326)
摘 要: 用CARIMA模型描述液压挤压机柱塞行进速度与节流阀驱动步进电机控制脉冲之间的关系,采用广义预测控制(GPC)算法控制挤压速度,使其跟踪速度引导曲线以实现模拟等温挤压。仿真实验表明,采用GPC算法能使挤压速度精确跟踪设定曲线,并能有效抑制对象参数时变、突加恒值干扰及随机干扰的影响。
关键字: 液压挤压机 挤压速度控制 CARIMA模型 GPC算法
FOR HYDRAULIC EXTRUSION PRESS
(1.College ofInformation Engineering, Central South University of Technology,Changsha 410083
2.College of Mechanical and Automotive Engineering, Hunan University,Changsha 410082
3.Forging Branch Plant, Southwest Aluminium Fabrication Plant, Chongqing631326)
Abstract:The relationship between the marching speed of main plunger of extrusion press and the control pulses of stepping motor s driving throttle valve was described by CARIMA model. The generalized predictive control (GPC) strategy was used to control extrusion velosity. This method can make the press track speed guide curves to achieve simulative isothermal extrusion. Simulation results showed that the GPC algorithm enabled extrusion speed to follow the given tracks accurately, and could effectively restrain the influence of variety of plant parameters.
Key words: hydraulic extrusion press extrusion speed control CARIMA model GPC algorithm