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文章编号: 16726987(2018)02000115; DOI: 10.16351/j.16726987.2018.02.001
丁锋1,2, 徐玲2, 刘喜梅1
(1.青岛科技大学 自动化与电子工程学院,山东 青岛 266042; 2.江南大学 物联网工程学院,江苏 无锡 214122)
摘要: 本工作利用系统的脉冲响应观测数据,提出了辨识一阶系统、二阶系统传递函数参数的两点法、三点法等,以及确定传递函数参数的差分方程法和面积法。所提出的方法能够避免直接求解超越方程,且原理简单,实现方便。
关键词: 传递函数; 参数估计; 系统辨识; 阶跃响应; 脉冲响应
中图分类号: TP 273文献标志码: A
引用格式:丁锋, 徐玲, 刘喜梅. 传递函数辨识(2):脉冲响应两点法和三点法\[J\]. 青岛科技大学学报(自然科学版), 2018, 39(2): 115.
DING Feng, XU Ling, LIU Ximei. Transfer function identification. Part B: Twopoint and threepoint methods based on the impulse responses\[J\]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2018, 39(2): 115.
Transfer Function Identification. Part B: TwoPoint and ThreePoint
Methods Based on the Impulse Responses
DING Feng1,2, XU Ling2, LIU Ximei1
(1.College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2.School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China)
Abstract: By means of the system impulse response data, this paper presents twopoint methods and threepoint methods for identifying the parameters of firstorder systems and secondorder systems, which are described by transfer functions, and presents the difference equation method and the area method for identifying transfer functions. The proposed algebraic methods of determining the parameters of the transfer functions have simple mechanism and ease to understand, and avoid solving some transcendental equations.
Key words: transfer function; parameter estimation; system identification; step response; impulse response
收稿日期: 20180126
基金项目: 国家自然科学基金项目(61472195).
作者简介: 丁锋(1963—),男,博士,“泰山学者”特聘教授,博士生导师.