改进的电弧弧长自适应T-S模糊观测器  

An improved adaptive T-S fuzzy observer for arc length observing

作　　者：高哲[1,2] 廖晓钟[1,2] 沙德尚[1,2] 

机构地区：[1]北京理工大学自动化学院,北京100081 [2]北京理工大学复杂系统智能控制与决策教育部重点实验室,北京100081

出　　处：《控制理论与应用》2011年第8期1171-1175,共5页Control Theory & Applications

基　　金：国家自然科学基金资助项目(50807005)

摘　　要：通常基于Lyapunov方法设计自适应观测器时,要求系统满足Kalman-Yakubovitch-Popov(KYP)定理的约束.因此,通过增加辅助变量放宽了约束条件,对未知参数的一类非线性系统,提出了一种模糊自适应观测器,用来观测熔化极气体保护焊的弧长.在焊枪到工件的距离未知的情况下,可以有效地获得弧长变化信息.仿真结果验证了该方法的有效性.The design of the adaptive observer based on the Lyapunov method commonly requires that the system satisfies constraints of Kalman-Yakubovitch-Popov（KYP） theorem. Therefore, by adding an auxiliary variable to relax this constraint, this paper presents an improved adaptive observer for nonlinear systems with unknown parameters. This method is applied to design an observer for the arc length in a gas-metal arc welding system. The arc length is effectively estimated on condition that the distance between the welding tip to the work piece is unknown. Simulation results show the effectiveness of this approach.

关 键 词：模糊系统 自适应观测器 弧长观测 熔化极气体保护焊 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]