Digital Controller Design for Time-delayed Bouc-Wen Hysteretic Systems

摘要：

　　Bouc-Wen model is a popular analytical form to describe hysteretic system while the non-smooth absolute-value function terms in the model bring about challenges in control system design.Different from traditional piecewise approach,this paper presents a digital control design methodology based on a revised model with a universal smooth representation.In the proposed method,approximated scalar sign function in a smooth rational form is utilized to replace the non-smooth absolute-value function terms,resulting in an approximate description of Bouc-Wen model with adjustable accuracy and universal smoothness which facilitates the following linearization.Then the optimal linearization technique is adopted to obtain an accurate local linear model at any operating point.Next,an analog controller is developed based on the local linear model to attain the required control performance.Then through digital redesign,the analog controller is converted to the digital counterpart which is further capable of compensating time delays arising from controller computation,A/D and D/A conversion etc.The feasibility and effectiveness of the proposed method have been verified through simulations with two illustrative examples.

关键词： Nonlinear systems hysteresis Bouc-Wen model scalar sign function digital redesign delay compensation

作者: ZHANG Jian ZHANG Yongpeng ALI H.Warsame FULLER H.John SHIEH Leang-san

作者单位: Electrical & Computer Engineering Department,Prairie View A&M University,USA Engineering Technology Department,Prairie View A&M University,USA Electrical & Computer Engineering Department,University of Houston,USA

会议类型: 国际会议

会议名称: The 33th Chinese Control Conference第33届中国控制会议

会议地点: 南京

会议语种:英文

页码: 1868-1875

在线出版日期: 2014-07-28（万方平台首次上网日期，不代表论文的发表时间）