引用本文: | 高哲,廖晓钟,沙德尚.改进的电弧弧长自适应T-S模糊观测器[J].控制理论与应用,2011,28(8):1171~1175.[点击复制] |
GAO Zhe,LIAO Xiao-zhong,SHA De-shang.An improved adaptive T-S fuzzy observer for arc length observing[J].Control Theory and Technology,2011,28(8):1171~1175.[点击复制] |
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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 |
摘要点击 2893 全文点击 1680 投稿时间:2010-09-01 修订日期:2010-12-27 |
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DOI编号 10.7641/j.issn.1000-8152.2011.8.CCTA101014 |
2011,28(8):1171-1175 |
中文关键词 模糊系统 自适应观测器 弧长观测 熔化极气体保护焊 |
英文关键词 fuzzy systems adaptive observer arc length observing gas metal arc welding |
基金项目 国家自然科学基金资助项目(50807005). |
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中文摘要 |
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. |
英文摘要 |
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. |