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Adaptive Control of Systems with Dead Zones

Gianino, Michele (1994) In MSc Theses
Department of Automatic Control
Abstract
In this paper an adaptive system to control processes affected by dead-zone nonlinearities, based on a nonlinear compensation, has been studied. The adaptive control schemes ensure boundedness of the close-loop signals and reduce the tracking error. <br><br> The main goal was to understand the problem in details, analyzing the different situations and difficulties that this nonlinear compensation might introduce. A simple Lyapunov approach shows boundedness of all the signals, but a further analysis shows that this system might lead to instability. A modification of the control law assures absolute stability to the system, when the only compensator is updated. Furthermore, an analysis of the unstable situation leads to the identification... (More)
In this paper an adaptive system to control processes affected by dead-zone nonlinearities, based on a nonlinear compensation, has been studied. The adaptive control schemes ensure boundedness of the close-loop signals and reduce the tracking error. <br><br> The main goal was to understand the problem in details, analyzing the different situations and difficulties that this nonlinear compensation might introduce. A simple Lyapunov approach shows boundedness of all the signals, but a further analysis shows that this system might lead to instability. A modification of the control law assures absolute stability to the system, when the only compensator is updated. Furthermore, an analysis of the unstable situation leads to the identification of needed constraints on the input signal. <br><br> All the controllers are designed following a model reference approach. (Less)
Please use this url to cite or link to this publication:
author
Gianino, Michele
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
publication/series
MSc Theses
report number
TFRT-5519
ISSN
0280-5316
language
English
id
8848970
date added to LUP
2016-03-25 12:04:52
date last changed
2016-03-25 12:04:52
@misc{8848970,
  abstract     = {In this paper an adaptive system to control processes affected by dead-zone nonlinearities, based on a nonlinear compensation, has been studied. The adaptive control schemes ensure boundedness of the close-loop signals and reduce the tracking error. <br><br> The main goal was to understand the problem in details, analyzing the different situations and difficulties that this nonlinear compensation might introduce. A simple Lyapunov approach shows boundedness of all the signals, but a further analysis shows that this system might lead to instability. A modification of the control law assures absolute stability to the system, when the only compensator is updated. Furthermore, an analysis of the unstable situation leads to the identification of needed constraints on the input signal. <br><br> All the controllers are designed following a model reference approach.},
  author       = {Gianino, Michele},
  issn         = {0280-5316},
  language     = {eng},
  note         = {Student Paper},
  series       = {MSc Theses},
  title        = {Adaptive Control of Systems with Dead Zones},
  year         = {1994},
}