Control of uncertain sampled-data systems: An Adaptive posicast control approach
Date
2017Source Title
IEEE Transactions on Automatic Control
Print ISSN
0018-9286
Electronic ISSN
1558-2523
Publisher
Institute of Electrical and Electronics Engineers Inc.
Volume
62
Issue
5
Pages
2597 - 2602
Language
English
Type
ArticleItem Usage Stats
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Abstract
This technical note proposes a discrete-time adaptive controller for the control of sampled-data systems. The design is inspired from the Adaptive Posicast Controller (APC) which was designed for time-delay systems in continuous time. Due to the performance degradation caused by digital approximation of continuous laws, together with the problem of assuming time-delays as integer multiples of sampling intervals, the benefits of APC could not be fully realized. In this technical note, these approximations/assumptions are eliminated. In addition, a disturbance observer is incorporated into the controller design which minimizes the effect of disturbances on the system. Extension to the case of uncertain input time-delay is also presented. The proposed approach is verified in simulation studies. © 1963-2012 IEEE.