气辅成型注气压力的PID控制应用研究  

Study on PID Application of Gas-injection Pressure Curve in Gas-assistant Injection Molding

作　　者：孙锡红[1] 傅沛福[2] 李义[2] 梁继才[2] 孙志斌[2] 

机构地区：[1]上海理工大学机械学院 [2]吉林大学辊锻工艺研究所

出　　处：《农业机械学报》2003年第3期115-117,121,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：上海市教委基金资助项目 (项目编号 :2 0 0 0 H0 8)

摘　　要：建立了注气压力曲线的控制模型 ,对注气压力曲线的 PID控制算法进行了研究 ,提出了提高注气压力控制精度的扩充临界比例带法的 PID参数计算公式 ,并在研制的小型气辅装置上进行了实验验证。结果表明 :扩充临界比例带法是一种基于系统临界振荡参数的闭环整定法 ,可以优化参数 。The common measures of gas injection used in the gas assistant injection molding(GAIM) were reviewed and the gas injection pressure curve and its controlling model were developed. It studied the PID arithmetic in the gas injection pressure controlling, and put forwards the PID parameters calculation formula of the expanding critical proportion zone method used in the GAIM. The method was tested and verified on the small type GAIM apparatus developed by oneself. The results show that the expanding critical proportion zone method is a closed control conformity method based on the system vibration parameters. It will optimize the parameters and enhance the control precision.

关 键 词：气辅成型 注气压力 PID控制 注气压力曲线 

分 类 号：TG386[金属学及工艺—金属压力加工]