TY - JOUR
T1 - Enhancement of disturbance-rejection performance of uncertain input-delay systems
T2 - A disturbance predictor approach
AU - Yu, Pan
AU - Wu, Min
AU - She, Jinhua
AU - Liu, Kang Zhi
AU - Nakanishi, Yosuke
N1 - Funding Information:
Hubei Provincial Natural Science Foundation of China under Grant 2015CFA010, by the 111 Project under Grant B17040, by the National Key Research and Development Program of China under Grant 2017YFB1300903, and by the Program of China Scholarship Council under Grant 201706370139.
Funding Information:
This work was supported by the National Natural Science Foundation of China under Grants 61733016 and 61473313, by the
PY - 2018/8/14
Y1 - 2018/8/14
N2 - To suppress disturbances in uncertain tracking control systems with an input-delay, a disturbance predictor based on a high-order generalised extended-state observer is devised in this study. A smooth enough approximation of the disturbance is first made, then the approximation ahead of delay-time is predicted. The construction of the disturbance predictor is based on a truncated Taylor polynomial. To facilitate the analysis and design of the closed-loop control system, control gains for the nominal plant are designed in advance. Then the stability analysis for the closed-loop system is conducted, which yields a robust stability condition. As the disturbance predictor takes into consideration the influence of the input-delay, the presented method enables the enhancement of the disturbance-rejection performance. Finally, comparisons of the developed method with major methods in this field are conducted to validate the developed method and to demonstrate its advantages.
AB - To suppress disturbances in uncertain tracking control systems with an input-delay, a disturbance predictor based on a high-order generalised extended-state observer is devised in this study. A smooth enough approximation of the disturbance is first made, then the approximation ahead of delay-time is predicted. The construction of the disturbance predictor is based on a truncated Taylor polynomial. To facilitate the analysis and design of the closed-loop control system, control gains for the nominal plant are designed in advance. Then the stability analysis for the closed-loop system is conducted, which yields a robust stability condition. As the disturbance predictor takes into consideration the influence of the input-delay, the presented method enables the enhancement of the disturbance-rejection performance. Finally, comparisons of the developed method with major methods in this field are conducted to validate the developed method and to demonstrate its advantages.
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U2 - 10.1049/iet-cta.2017.1343
DO - 10.1049/iet-cta.2017.1343
M3 - Article
AN - SCOPUS:85051250581
VL - 12
SP - 1673
EP - 1682
JO - IET Control Theory and Applications
JF - IET Control Theory and Applications
SN - 1751-8644
IS - 12
ER -