On frequency-domain analysis of ADRC for uncertain system

Author

Wenchao Xue ; Yi Huang

Author_Institution

Lab. of Syst. & Control, Acad. of Math. & Syst. Sci., Beijing, China

fYear

2013

fDate

17-19 June 2013

Firstpage

6637

Lastpage

6642

Abstract

The paper investigates the frequency properties of active disturbance rejection control (ADRC) for a typical class of linear time invariant uncertain system. Firstly, it is shown that the ADRC based closed-loop can be stabilized by designing the bandwidth of extended state observer (ESO). The paper further analyzes the phase margin and crossover frequency of ADRC based system. The theoretical results reveal some useful frequency properties of the ADRC based system: the phase margin and crossover frequency are almost unchanged despite some uncertain parameters. And moreover, different kinds of uncertain parameter have various influence on the frequency properties of the system.

Keywords

closed loop systems; control system analysis; frequency-domain analysis; linear systems; observers; uncertain systems; ADRC based closed-loop; active disturbance rejection control; crossover frequency; extended state observer; frequency-domain analysis; linear time invariant uncertain system; phase margin; uncertain system; Bandwidth; Closed loop systems; Equations; Stability analysis; Transfer functions; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference (ACC), 2013

Conference_Location

Washington, DC

ISSN

0743-1619

Print_ISBN

978-1-4799-0177-7

Type

conf

DOI

10.1109/ACC.2013.6580881

Filename

6580881