Title :
Design of a disturbance observer for discrete-time linear systems
Author_Institution :
POSCO, Pohang, South Korea
Abstract :
This paper presents a design method of a disturbance observer for discrete-time linear systems. In order to estimate the unknown disturbance, an augmented model is constructed by supposing the estimated disturbance to be an auxiliary state variable. The sufficient condition for the existence and convergence of the robust observer is proposed in terms of linear matrix inequality (LMI). Numerical examples are given to show the effectiveness of the proposed method.
Keywords :
discrete time systems; linear matrix inequalities; linear systems; observers; LMI; augmented model; auxiliary state variable; discrete-time linear systems; disturbance observer design method; linear matrix inequality; numerical analysis; robust observer convergence; robust observer existence; sufficient condition; unknown disturbance estimation; Legged locomotion; Discrete-time systems; Disturbance observer;
Conference_Titel :
Control, Automation and Systems (ICCAS), 2014 14th International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-8-9932-1506-9
DOI :
10.1109/ICCAS.2014.6987772
