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文章编号: 16726987(2018)03000115; DOI: 10.16351/j.16726987.2018.03.001
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: 系统在正弦信号激励下的输出称为系统的正弦响应。在单频正弦信号、双频正弦信号和多频正弦信号激励下,利用系统的正弦响应观测数据,讨论确定一阶系统、二阶系统、高阶等容惯性系统传递函数参数代数解的两点法、四点法和多点法,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; 正弦响应
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(3):正弦响应两点法和多点法\[J\]. 青岛科技大学学报(自然科学版), 2018, 39(3): 115.
DING Feng, XU Ling, LIU Ximei. Transfer function identification. Part C: Twopoint and multipoint methods based on the sine responses\[J\]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2018, 39(3): 115.
Transfer Function Identification. Part C: TwoPoint and
MultiPoint Methods Based on the Sine 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: The output of a system driven by sine signals is called the sine response. By means of the sine response data,this paper presents twopoint methods, fourpoint methods and multipoint methods for identifying the parameters of firstorder, secondorder and highorder systems described by transfer functions using singlefrequency, dualfrequency and multifrequency sine signals as the inputs.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; sine response
收稿日期: 20180408
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.