%0 Journal Article
%T Robust boundary control for flexible fluid-transporting marine riser based on internal fluid dynamics<br>基于内流动力学的海洋输油柔性立管鲁棒边界控制
%A GAO Hong-xi
%A ZHAO Zhi-ji
%A WU Xin-sheng
%A LIU Yu
%A <br>高红霞
%A 赵志甲
%A 吴忻生
%A 刘屿
%J 控制理论与应用
%D 2012
%I 
%X The vibrations caused by random ocean currents will make fatigue fractures for the flexible marine risers. Boundary control can lower the risk of fatigue fracture by reducing vibration displacements of the riser. By introducing internal fluid dynamics to the original infinite dimensional parameter distribution equation (PDEs), we develop an improved model for describing the dynamic behavior of risers, laying groundwork to suppress the marine riser vibration excited by internal and external fluids. The closed-looped stability and the uniform boundedness of states are proved based on Lyapunov direct method. The robust boundary controller for reducing the vibrations of flexible risers is developed, in which the sign function is employed to eliminate the influence of the uncertain environmental disturbances to the controller. Simulation results show that the proposed boundary controller effectively reduces the vibration displacements of the flexible risers.
%K marine risers
%K robust control
%K boundary control
%K internal fluid dynamics
%K uniform stability<br>海洋立管
%K 鲁棒控制
%K 边界控制
%K 内流动力学
%K 一致稳定性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=970898A57DFC021F93AB51667BAED7F7&aid=A56F1C7481D4740807B2DD83760EE9B3&yid=99E9153A83D4CB11&vid=771469D9D58C34FF&iid=B31275AF3241DB2D&sid=A1BB529A18D3A83E&eid=4198A31627C9B2A6&journal_id=1000-8152&journal_name=控制理论与应用&referenced_num=0&reference_num=0