Performance analysis of discrete-time disturbance observer for second-order systems

Author

Yang, Kwangjin ; Choi, Youngjin ; Chung, Wan Kyun

Author_Institution

Dept. of Mech. Eng., Korea Air Force Acad., Chungju, South Korea

Volume

5

fYear

2003

fDate

9-12 Dec. 2003

Firstpage

4877

Abstract

The disturbance observer (DOB) has been widely used in high speed and high precision motion control applications. Though most of DOBs have been implemented as the discrete-time form in digital devices, we are still short of the researches on discrete-time DOB in spite of rich references on continuous-time DOB. In this paper, we will discuss the disturbance rejection property and measurement noise effect of a discrete-time DOB. Especially, we focus on revealing the role of sampling time in designing the discrete-time DOB for second order systems. Finally, we show the validity of analysis through simulations and experiments for optical disk drive systems.

Keywords

disc drives; discrete time systems; motion control; observers; optical disc storage; continuous time disturbance observer; digital devices; discrete time disturbance observer; motion control; optical disk drive systems; performance analysis; sampling time; second order systems; Filters; Intelligent robots; Mechanical engineering; Motion control; Noise measurement; Optical noise; Performance analysis; Sampling methods; Transfer functions; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 2003. Proceedings. 42nd IEEE Conference on

ISSN

0191-2216

Print_ISBN

0-7803-7924-1

Type

conf

DOI

10.1109/CDC.2003.1272378

Filename

1272378