An adaptive output feedback control for time-delay systems with input disturbance

Time-delay and input disturbance frequently occur in control systems, which decrease the pre-defined performance of the closed-loop system. This paper presents an output feedback controller that compensates the performance degradation owing to time-delay and input disturbance. Simple adaptive contro...

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Bibliographic Details
Published in2009 ICCAS-SICE pp. 1742 - 1746
Main Authors In-Hyuk Kim, Goo-Jong Jeong, Young-Ik Son
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2009
Subjects
Adaptive control
Attenuation
Control systems
Degradation
Delay effects
Disturbance Observer
Non-minimum Phase
Output feedback
Programmable control
Robust control
Robustness
Simple Adaptive Control
Smith Predictor
Time Delay
Transfer functions
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Summary:Time-delay and input disturbance frequently occur in control systems, which decrease the pre-defined performance of the closed-loop system. This paper presents an output feedback controller that compensates the performance degradation owing to time-delay and input disturbance. Simple adaptive control (SAC) and a new disturbance observer (DOB) approaches have been combined to achieve the control purpose. It is shown that the closed-loop system can be made robust against uncertain time-delay by using the SAC algorithm. For disturbance attenuation a new DOB structure has been used for the non-minimum phase system caused by to the Pade approximation of time-delay. Simulation results show the performance improvement by the proposed controller for reducing the both effects of time-delay and input disturbance.
ISBN:9784907764340
4907764340