Output feedback adaptive control of a class of nonlinear discrete-time systems with unknown control directions and preceded by hysteresis

Autor:	Adel Ghaderi, Seyed Mohsen Hosseini-Ardali
Rok vydání:	2015
Předmět:	Engineering Adaptive control Basis (linear algebra) business.industry Control (management) Nonlinear control Computer Science Applications Tracking error Nonlinear system Hysteresis Discrete time and continuous time Control and Systems Engineering Control theory business
Zdroj:	International Journal of Control. 88:2412-2422
ISSN:	1366-5820 0020-7179
Popis:	This paper considers the output feedback adaptive controller design problem for a class of discrete-time nonlinear systems in output feedback form with unknown control directions and preceded by unknown hysteresis. The problem of lacking in a-priori knowledge on the control directions and unknown hysteresis are solved by using the discrete Nussbaum gain and Prandtl–Ishlinskii model, respectively. The system is transformed into the form of a nonlinear auto regressive moving average (NARMA) model to construct an output feedback control. To overcome the noncausal problem in the control design, future output prediction laws and parameter update laws with the dead-zone technique are constructed on the basis of the NARMA model. The proposed control algorithm guarantees that all the signals in the controlled system are bound and the output tracking error is made to be neighbourhood around zero, ultimately. Finally, simulations are performed on a nonlinear system to show the effectiveness of the proposed method
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d9ee8b413e724fb69c6fb4767102f0f https://doi.org/10.1080/00207179.2015.1046494 Zobrazit plný text záznamu