NDLI: Predictor-based output feedback control design for sampled systems with input delay subject to disturbance

Content Provider	IET Digital Library
Author	Hao, Shoulin Liu, Tao Zhou, Bin
Abstract	In this study, a predictor-based output feedback control design is proposed for sampled systems with input delay subject to disturbance. An extended state observer (ESO) is first constructed to simultaneously estimate the system state and disturbance based on only the output measurement. Then a filtered predictor is constructed by using the estimated state and disturbance to compensate the input delay so as to improve the disturbance rejection performance. For the presence of a constant or asymptotically stable disturbance, a robust H infinity feedback control design based on state prediction and disturbance estimation is proposed to realise no steady-state output error, despite mismatched disturbance. When there exists a time-varying disturbance with deterministic dynamics, such as a sinusoidal type, the proposed predictor can achieve a small prediction error by properly tuning the filter, such that the existing observer-based feedback control methods for delay-free systems can be directly adopted to stabilise such a system with input delay. Moreover, the output error bounds in the presence of time-varying disturbance are quantitatively analysed for using the ESO-based predictor feedback and anti-disturbance predictor feedback, respectively. Two illustrative examples are given to demonstrate the effectiveness and merit of the proposed method.
Starting Page	3329
Ending Page	3340
Page Count	12
ISSN	17518644
Volume Number	11
e-ISSN	17518652
Issue Number	Issue 18, Dec (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/11/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2017.0504
Journal	IET Control Theory & Applications
Publisher Date	2017-09-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Anti-disturbance Predictor Feedback Asymptotic Stability Control System Analysis Control System Synthesis Delay Discrete Control System Distributed Parameter Control System Disturbance Estimation ESO-based Predictor Feedback Extended State Observer Feedback H∞ Control Input Delay Observers Optimal Control Predictor-based Output Feedback Control Design Robust Control Robust H Infinity Feedback Control Design Sampled Data System Sampled System Stability in Control Theory State Prediction Synthesis Method Time Varying Control System Time Varying System Time-varying Disturbance
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications

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