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Control of sampled data systems with variable sampling rate
journal contribution
posted on 2008-10-24, 10:14 authored by Michael Schinkel, Wen-Hua ChenWen-Hua ChenThis paper addresses stability and performance of sampled-data
systems with variable sampling rate, where the change between sam-
pling rates is decided by a scheduler. A motivational example is pre-
sented, where a stable continuous time system is controlled with two
sampling rates. It is shown that the resulting system could be unsta-
ble when the sampling changes between these two rates, although each
individual closed-loop system is stable under the designed controller
that minimizes the same continuous loss function. Two solutions are
presented in this paper. The ¯rst solution is to impose restrictions on
switching sequences such that only stable sequences are chosen. The
second solution presented is more general, where a piecewise constant
state feedback control law is designed which guarantees stability for all possible variations of sampling rate. Furthermore, the performance definedn by a continuous time quadratic cost function for the sampled-data system with variable sampling rate can be optimised using the proposed synthesis method.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
SCHINKEL, M. and CHEN, W-H., 2006. Control of sampled data systems with variable sampling rate. International journal of systems science, 37 (9) pp. 609-618Publisher
© Taylor & FrancisPublication date
2006Notes
This is a journal article. It was published in the journal, International journal of systems science [© Taylor & Francis] and the definitive version is available at: http://www.informaworld.com/openurl?genre=article&issn=0020-7721&volume=37&issue=9&spage=609ISSN
0020-7721Language
- en