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Keywords = offset-free global tracking control

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18 pages, 494 KiB  
Article
Disturbance Observer-Based Offset-Free Global Tracking Control for Input-Constrained LTI Systems with DC/DC Buck Converter Applications
by Kyunghwan Choi, Dong Soo Kim and Seok-Kyoon Kim
Energies 2020, 13(16), 4079; https://doi.org/10.3390/en13164079 - 6 Aug 2020
Cited by 4 | Viewed by 2469
Abstract
This paper presents an offset-free global tracking control algorithm for the input-constrained plants modeled as controllable and open-loop strictly stable linear time invariant (LTI) systems. The contribution of this study is two-fold: First, a global tracking control law is devised in such a [...] Read more.
This paper presents an offset-free global tracking control algorithm for the input-constrained plants modeled as controllable and open-loop strictly stable linear time invariant (LTI) systems. The contribution of this study is two-fold: First, a global tracking control law is devised in such a way that it not only leads to offset-free reference tracking but also handles the input constraints using the invariance property of a projection operator embedded in the proposed disturbance observer (DOB). Second, the offset-free tracking property is guaranteed against uncertainties caused by plant-model mismatch using the DOB’s integral action for the state estimation error. Simulation results are given in order to demonstrate the effectiveness of the proposed method by applying it to a DC/DC buck converter. Full article
(This article belongs to the Special Issue Distribution Grids Modernization)
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