|
Digital
Library of the European Council for Modelling
and Simulation |
Title: |
Verification Of Robust Properties Of Digital Control
Closed- Loop Systems |
Authors: |
Vladimir Bobal,
Lubos Spacek, Peter Hornak |
Published in: |
(2017).ECMS 2017 Proceedings
Edited by: Zita Zoltay Paprika, Péter Horák, Kata Váradi, Péter Tamás
Zwierczyk, Ágnes Vidovics-Dancs, János Péter Rádics European Council for Modeling and Simulation. doi:10.7148/2017 ISBN:
978-0-9932440-4-9/ ISBN:
978-0-9932440-5-6 (CD) 31st European Conference on Modelling and
Simulation, Budapest, Hungary, May 23rd
– May 26th, 2017 |
Citation
format: |
Vladimir
Bobal, Lubos Spacek, Peter Hornak (2017). Verification Of Robust Properties
Of Digital Control Closed- Loop Systems, ECMS 2017 Proceedings Edited by:
Zita Zoltay Paprika, Péter Horák, Kata Váradi, Péter Tamás Zwierczyk,
Ágnes Vidovics-Dancs, János Péter Rádics European Council for Modeling
and Simulation. doi: 10.7148/2017-0348 |
DOI: |
https://doi.org/10.7148/2017-0348 |
Abstract: |
Robustness
is specific property of closed-loop systems when the designed controller
guarantees control not only for one nominal controlled system but also for
all predefined class of systems (perturbed models). The robust theory is
mainly exploited for design of the continuous-time systems. This paper deals
with an experimental simulation investigation of robust properties of digital
control closed-loop systems. Minimization of the Linear Quadratic (LQ)
criterion was used for the design of control algorithm. Polynomial approach
is based on the structure of the controller with two degrees of freedom
(2DOF). Four types of process models (stable, non-minimum phase, unstable and
integrating) were used for controller design. The Nyquist plot based characteristics
of the open-loop transfer function (gain margin, phase margin and modulus
margin) served as robustness indicators. The influence of change of process
gain was chosen as a parametric uncertainty. The experimental results
demonstrated that a robustness of examined digital control closed-loop
systems could be improved by addition of user-defined poles (UDP). |
Full
text: |