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Robust adaptive backstepping controller design for DC-DC buck converters with external disturbances
conference contribution
posted on 2016-06-01, 00:00 authored by Tushar Kanti Roy, Apel MahmudApel Mahmud, W Shen, Enamul HaqueEnamul Haque, Aman Maung Than OoAman Maung Than OoIn modern power electronic systems, DC-DC converter is one of the main controlled power sources for driving DC systems. But the inherent nonlinear and time-varying characteristics often result in some difficulties mostly related to the control issue. This paper presents a robust nonlinear adaptive controller design with a recursive methodology based on the pulse width modulation (PWM) to drive a DC-DC buck converter. The proposed controller is designed based on the dynamical model of the buck converter where all parameters within the model are assumed as unknown. These unknown parameters are estimated through the adaptation laws and the stability of these laws are ensured by formulating suitable control Lyapunov functions (CLFs) at different stages. The proposed control scheme also provides robustness against external disturbances as these disturbances are considered within the model. One of the main features of the proposed scheme is that it overcomes the over-parameterization problems of unknown parameters which usually appear in some conventional adaptive methods. Finally, the effectiveness of the proposed control scheme is verified through the simulation results and compared to that of an existing adaptive backstepping controller. Simulation results clearly indicate the performance improvement in terms of a faster output voltage tracking response.
History
Event
IEEE Industrial Electronics and Applications Conference (11th : 2016 : Hefei, China)Pagination
1218 - 1223Publisher
IEEELocation
Hefei, ChinaPlace of publication
Piscataway, NJPublisher DOI
Start date
2016-06-05End date
2016-06-07eISSN
2158-2297ISBN-13
9781467386449Language
engPublication classification
E Conference publication; E1 Full written paper - refereedCopyright notice
2016, IEEEEditor/Contributor(s)
[Unknown]Title of proceedings
ICIEA 2016 : Proceedings of the 11th IEEE Industrial Electronics and Applications ConferenceUsage metrics
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