摘要
分析了剪切—闪光对焊的工艺过程及各阶段的作用,指出保证焊接质量的关键因素是在保证焊接电压的前提下使待焊工件按给定的位移曲线s=kt2运动,建立了液压伺服控制系统的数学模型,并对线性二次型控制的基本原理进行了详细的阐述,利用AMES im建模与仿真软件对液压伺服控制系统进行了分别采用LQR控制与PID控制的仿真对比试验.结果表明,将LQR算法用于"剪切—闪光对焊"中,位置跟踪误差是传统PID控制器的六分之一,更能满足"剪切—闪光对焊"工艺对位置伺服系统的要求.
The technological process of shear-flash butt welding and the role of each stage were analysed in this paper.The key factor to welding quality is that the displacement of workpiece to be weld must be according with equation:s=kt2.The mathematical model of hydraulic servo control system has been established.The basic principle of linear quadratic was described in detail.The simulation of hydraulic servo control system has been done by modeling and simulation software AMESim.LQR control algorithm and PID control algorithm were respectively used in simulation.The results showed that the tracking error of LQR controller is only one-sixth of traditional PID controller,which is much better meeting the requirements of the position servo system of shear-flash butt welding technological process.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第1期41-44,共4页
Transactions of The China Welding Institution
基金
河北省科学技术研究与发展计划项目(06212174D)
