九点控制器对铝合金MIG焊熔宽控制的仿真  

Simulation of Al-MIG weld pool width control by nine-point controller

作　　者：樊丁[1] 李建军[1] 石玗[1] 高源[2] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050 [2]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《焊接学报》2007年第5期1-4,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50675093);甘肃省自然科学基金资助项目(3ZS051-A25-029);教育部春晖计划资助项目;兰州理工大学基金资助项目(SB1200601)

摘　　要：针对铝合金MIG焊过程的复杂性,采用近年来发展起来的一种新型智能控制器—九点控制器,设计了动态控制铝合金MIG焊熔池宽度的控制系统,并对其结构和原理进行了分析。为了对比九点控制器的性能,在已建立的脉冲电流占空比与正面熔宽的阶跃响应模型的基础上,分别利用PID、模糊控制器和九点控制器对铝合金MIG焊接过程中熔池宽度控制进行了仿真研究。结果表明,九点控制器在保证控制精度的同时,具有较好的稳定性和鲁棒性,为实现铝合金MIG焊熔宽的控制提供了基础。Considering the characteristics of aluminum alloy MIG welding process,nine-point controller was developed to control weld pool width.The structure and the principle of nine-point controller were analyzed.Based on the mathematic model of step response between pulse current and weld pool width,the simulations on three controlles of PID,fuzzy and nine-point controller used to control aluminum alloy MIG weld pool width were studied.The simulation results show that nine-point controller not only has the best stability and robust than PID and fuzzy controller,but also assure the control accuracy and provides the theoretical basis to realize the intelligent control for aluminum alloy pulsed MIG welding process.

关 键 词：铝合金 熔化极惰性气体保护焊 九点控制器 智能控制 仿真 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]