Hybrid Adaptive Output Feedback Tracking for Stable Systems With Unknown Input Constraints

Autor:	Patrizio Tomei, Riccardo Marino
Rok vydání:	2022
Předmět:	Settore ING-INF/04 Adaptive control Control and Systems Engineering Control theory Computer science Interval (mathematics) Minimum phase Electrical and Electronic Engineering Tracking (particle physics) Constant (mathematics) Signal Computer Science Applications Sign (mathematics)
Zdroj:	IEEE Transactions on Automatic Control. 67:5207-5217
ISSN:	2334-3303 0018-9286
Popis:	The problem of global output tracking is addressed for stable minimum phase systems, with constant uncertain parameters and constant disturbances belonging to a known compact set, in the presence of input constraints such as amplitude saturation. The relative degree, the system order and the sign of the high frequency gain are assumed to be known. A hybrid adaptive output feedback control is designed to achieve global asymptotic output tracking, provided that there exists an input within the input constraints capable of tracking exactly the output reference signal. By virtue of the hybrid control approach, the closed loop system is linear within each time interval between parameter updating. Moreover, no information on input saturation are required by the controller. In addition to the standard assumptions in adaptive control design when inputs are unconstrained, further requirements on the reference signals, on system stability and on parameter bounds are needed when inputs are constrained.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df74983b5354052997ace4910e581170 https://doi.org/10.1109/tac.2021.3123238 Zobrazit plný text záznamu