The algebraic solution parameter estimation methods for control systems based on the frequency responses
by Ling Xu
International Journal of Modelling, Identification and Control (IJMIC), Vol. 37, No. 3/4, 2021

Abstract: System identification is a basic technique which can construct system models for designing system controllers. In order to reduce the complexity of the iterative or recursive algorithms and develop easy ways to identify system models, this paper is concerned with the problem of parameter estimation for control systems from observed input and output data of system frequency characteristics. Because the system parameters are contained in the real frequency and imaginary frequency characteristics, we design several algebraic solution methods which only use seldom measurements to determine system parameters in terms of the first-order inertial system and second-order pole systems. In this study, the two-point method, three-point method and four-point method are derived by using the discrete observations of the real frequency characteristic or imaginary frequency characteristic or combining the real frequency and imaginary frequency characteristic. Finally, the effectiveness of the proposed algebraic solution methods for estimating parameters of control systems is verified by a few numerical examples.

Online publication date: Thu, 07-Apr-2022

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Modelling, Identification and Control (IJMIC):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com