Frequency conditions for stable networked controllers with time-delay

The paper analyses a networked control system consisting of a linear time-invariant system with a static feedback nonlinearity, subject to large delays in the feedback loop. This model is valid for example in wireless data flow control, where a saturation occurs since the flow is one-directional. Th...

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Bibliographic Details
Published inInternational journal of control Vol. 92; no. 4; pp. 886 - 895
Main Authors Nygren, Johannes, Wigren, Torbjörn, Pelckmans, Kristiaan
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 03.04.2019
Taylor & Francis Ltd
Subjects
Computer simulation
Control theory
Feedback loops
Flow control
networked control
nonlinear control
saturation
stability
Time delay
Time invariant systems
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Summary:The paper analyses a networked control system consisting of a linear time-invariant system with a static feedback nonlinearity, subject to large delays in the feedback loop. This model is valid for example in wireless data flow control, where a saturation occurs since the flow is one-directional. The present paper extends previous results by proving necessity, in case the loop gain is uniformly less than one. The results are validated and illustrated in a simulation study.
ISSN:0020-7179
1366-5820
1366-5820
DOI:10.1080/00207179.2017.1372635