%0 Journal Article
%T Non-smooth observer for sandwich systems with backlash<br>基于非光滑观测器的间隙三明治系统状态估计
%A ZHOU Zu-peng
%A TAN Yong-hong
%A <br>周祖鹏
%A 谭永红
%J 控制理论与应用
%D 2012
%I 
%X Industrial systems involving backlash, such as mechanical transmission systems and hydraulic systems, can be described by so-called sandwich systems with backlash. A novel non-smooth observer is proposed to handle the state estimation for sandwich systems with backlash. Based on the characteristics of the system, a non-smooth state-space equation is constructed by using the separation principle. A non-smooth observer is developed based on the obtained state-space equation. The observer switches automatically among different operating zones according to the changes of operation conditions. The convergence of the non-smooth observer is discussed. The application of this observer to a practical hydraulic servo system is realized. The comparison of tracking performances of the hydraulic servo system is made between the proposed non-smooth scheme and the conventional method. It is shown that the proposed non-smooth approach is with much better estimated performance.
%K non-smooth observer
%K backlash
%K sandwich system
%K state estimation<br>非光滑观测器
%K 间隙
%K 三明治系统
%K 状态估计
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=970898A57DFC021F93AB51667BAED7F7&aid=399F4AB6A5A1DC87872A5ED29968151F&yid=99E9153A83D4CB11&vid=771469D9D58C34FF&iid=CA4FD0336C81A37A&sid=339D79302DF62549&eid=1371F55DA51B6E64&journal_id=1000-8152&journal_name=控制理论与应用&referenced_num=0&reference_num=0