%0 Journal Article
%T An improved adaptive T-S fuzzy observer for arc length observing<br>改进的电弧弧长自适应T-S模糊观测器
%A GAO Zhe
%A LIAO Xiao-zhong
%A SHA De-shang
%A <br>高哲
%A 廖晓钟
%A 沙德尚
%J 控制理论与应用
%D 2011
%I 
%X 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.
%K fuzzy systems
%K adaptive observer
%K arc length observing
%K gas metal arc welding<br>模糊系统
%K 自适应观测器
%K 弧长观测
%K 熔化极气体保护焊
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=970898A57DFC021F93AB51667BAED7F7&aid=A8D31E0885BDCE414A6C6FA87B925A6E&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=5D311CA918CA9A03&sid=D610BE6A5A0C75BF&eid=C9B4EBB1C6A169D8&journal_id=1000-8152&journal_name=控制理论与应用&referenced_num=0&reference_num=15