Frequency Domain Identification of Fractional Order Time Delay Systems

摘要：

The problem of identifying a fractional order transfer function with time delay from frequency response data is considered. A method combining harmony search and linear least squares technique is proposed to solve the frequency domain identification problem. The optimal fractional derivative order and the time delay of the transfer function model are found using harmony search, while the numerator and denominator coefficients are obtained by solving linear least squares problems for every fractional derivative order and time delay generated with harmony search. Linear least squares estimator is used to reduce the computational burden in the rough-tuning phase of harmony search. Iterative linear least squares estimator is used to improve the accuracy in the fine-tuning phase. A numerical example is given to demonstrate the effectiveness of the proposed identification method.

关键词： Fractional Order Time Delay Systems Frequency Domain Identification Harmony Search Least Squares

作者: Cheng Peng Wang Li Yong Wang

作者单位: Department of Automation, University of Science and Technology of China, Hefei 230027, China

会议类型: 国际会议

会议名称: The 22nd China Control and Decision Conference(2010年中国控制与决策会议)

会议地点: 徐州

会议语种:英文

页码: 2635-2638

在线出版日期: 2010-05-26（万方平台首次上网日期，不代表论文的发表时间）